glibc/manual/install.texi

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@include macros.texi
@include pkgvers.texi
@ifclear plain
@node Installation, Maintenance, Library Summary, Top
@end ifclear
@c %MENU% How to install the GNU C Library
@appendix Installing @theglibc{}
Before you do anything else, you should read the FAQ at
@url{http://sourceware.org/glibc/wiki/FAQ}. It answers common
questions and describes problems you may experience with compilation
and installation.
Features can be added to @theglibc{} via @dfn{add-on} bundles. These are
separate tar files, which you unpack into the top level of the source
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
tree. Then you give @code{configure} the @samp{--enable-add-ons} option
to activate them, and they will be compiled into the library.
You will need recent versions of several GNU tools: definitely GCC and
GNU Make, and possibly others. @xref{Tools for Compilation}, below.
@ifclear plain
@menu
* Configuring and compiling:: How to compile and test GNU libc.
* Running make install:: How to install it once you've got it
compiled.
* Tools for Compilation:: You'll need these first.
* Linux:: Specific advice for GNU/Linux systems.
* Reporting Bugs:: So they'll get fixed.
@end menu
@end ifclear
@node Configuring and compiling
@appendixsec Configuring and compiling @theglibc{}
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@cindex configuring
@cindex compiling
@Theglibc{} cannot be compiled in the source directory. You must build
it in a separate build directory. For example, if you have unpacked
the @glibcadj{} sources in @file{/src/gnu/glibc-@var{version}},
create a directory
@file{/src/gnu/glibc-build} to put the object files in. This allows
removing the whole build directory in case an error occurs, which is
the safest way to get a fresh start and should always be done.
From your object directory, run the shell script @file{configure} located
at the top level of the source tree. In the scenario above, you'd type
@smallexample
$ ../glibc-@var{version}/configure @var{args@dots{}}
@end smallexample
Please note that even though you're building in a separate build
directory, the compilation may need to create or modify files and
directories in the source directory.
@noindent
@code{configure} takes many options, but the only one that is usually
mandatory is @samp{--prefix}. This option tells @code{configure}
where you want @theglibc{} installed. This defaults to @file{/usr/local},
but the normal setting to install as the standard system library is
@samp{--prefix=/usr} for @gnulinuxsystems{} and @samp{--prefix=} (an
empty prefix) for @gnuhurdsystems{}.
It may also be useful to set the @var{CC} and @var{CFLAGS} variables in
the environment when running @code{configure}. @var{CC} selects the C
compiler that will be used, and @var{CFLAGS} sets optimization options
for the compiler.
The following list describes all of the available options for
@code{configure}:
@table @samp
@item --prefix=@var{directory}
Install machine-independent data files in subdirectories of
@file{@var{directory}}. The default is to install in @file{/usr/local}.
@item --exec-prefix=@var{directory}
Install the library and other machine-dependent files in subdirectories
of @file{@var{directory}}. The default is to the @samp{--prefix}
directory if that option is specified, or @file{/usr/local} otherwise.
@item --with-headers=@var{directory}
Look for kernel header files in @var{directory}, not
@file{/usr/include}. @Theglibc{} needs information from the kernel's header
files describing the interface to the kernel. @Theglibc{} will normally
look in @file{/usr/include} for them,
but if you specify this option, it will look in @var{DIRECTORY} instead.
This option is primarily of use on a system where the headers in
@file{/usr/include} come from an older version of @theglibc{}. Conflicts can
occasionally happen in this case. You can also use this option if you want to
compile @theglibc{} with a newer set of kernel headers than the ones found in
@file{/usr/include}.
@item --enable-add-ons[=@var{list}]
Specify add-on packages to include in the build. If this option is
specified with no list, it enables all the add-on packages it finds in
the main source directory; this is the default behavior. You may
specify an explicit list of add-ons to use in @var{list}, separated by
spaces or commas (if you use spaces, remember to quote them from the
shell). Each add-on in @var{list} can be an absolute directory name
or can be a directory name relative to the main source directory, or
relative to the build directory (that is, the current working directory).
For example, @samp{--enable-add-ons=nptl,../glibc-libidn-@var{version}}.
@item --enable-kernel=@var{version}
This option is currently only useful on @gnulinuxsystems{}. The
@var{version} parameter should have the form X.Y.Z and describes the
smallest version of the Linux kernel the generated library is expected
to support. The higher the @var{version} number is, the less
compatibility code is added, and the faster the code gets.
@item --with-binutils=@var{directory}
Use the binutils (assembler and linker) in @file{@var{directory}}, not
the ones the C compiler would default to. You can use this option if
the default binutils on your system cannot deal with all the constructs
in @theglibc{}. In that case, @code{configure} will detect the
problem and suppress these constructs, so that the library will still be
usable, but functionality may be lost---for example, you can't build a
shared libc with old binutils.
@item --without-fp
Use this option if your computer lacks hardware floating-point support
and your operating system does not emulate an FPU.
@c disable static doesn't work currently
@c @item --disable-static
@c Don't build static libraries. Static libraries aren't that useful these
@c days, but we recommend you build them in case you need them.
@item --disable-shared
Don't build shared libraries even if it is possible. Not all systems
support shared libraries; you need ELF support and (currently) the GNU
linker.
@item --disable-profile
Don't build libraries with profiling information. You may want to use
this option if you don't plan to do profiling.
@item --enable-static-nss
Compile static versions of the NSS (Name Service Switch) libraries.
This is not recommended because it defeats the purpose of NSS; a program
linked statically with the NSS libraries cannot be dynamically
reconfigured to use a different name database.
@item --enable-hardcoded-path-in-tests
By default, dynamic tests are linked to run with the installed C library.
This option hardcodes the newly built C library path in dynamic tests
so that they can be invoked directly.
@item --disable-timezone-tools
By default, timezone related utilities (@command{zic}, @command{zdump},
and @command{tzselect}) are installed with @theglibc{}. If you are building
these independently (e.g. by using the @samp{tzcode} package), then this
option will allow disabling the install of these.
Note that you need to make sure the external tools are kept in sync with
the versions that @theglibc{} expects as the data formats may change over
time. Consult the @file{timezone} subdirectory for more details.
@item --enable-lock-elision=yes
Enable lock elision for pthread mutexes by default.
@item --enable-stack-protector
@itemx --enable-stack-protector=strong
@itemx --enable-stack-protector=all
Compile the C library and all other parts of the glibc package
(including the threading and math libraries, NSS modules, and
transliteration modules) using the GCC @option{-fstack-protector},
@option{-fstack-protector-strong} or @option{-fstack-protector-all}
options to detect stack overruns. Only the dynamic linker and a small
number of routines called directly from assembler are excluded from this
protection.
@item --enable-bind-now
Disable lazy binding for installed shared objects. This provides
additional security hardening because it enables full RELRO and a
read-only global offset table (GOT), at the cost of slightly increased
program load times.
@pindex pt_chown
@findex grantpt
@item --enable-pt_chown
The file @file{pt_chown} is a helper binary for @code{grantpt}
(@pxref{Allocation, Pseudo-Terminals}) that is installed setuid root to
fix up pseudo-terminal ownership. It is not built by default because
systems using the Linux kernel are commonly built with the @code{devpts}
filesystem enabled and mounted at @file{/dev/pts}, which manages
pseudo-terminal ownership automatically. By using
@samp{--enable-pt_chown}, you may build @file{pt_chown} and install it
setuid and owned by @code{root}. The use of @file{pt_chown} introduces
additional security risks to the system and you should enable it only if
you understand and accept those risks.
Use -Werror by default, add --disable-werror. As discussed starting at <https://sourceware.org/ml/libc-alpha/2014-11/msg00323.html>, this patch makes the glibc build use -Werror by default to avoid accidentally adding new warnings to the build. The configure option --disable-werror can be used to disable this. -Wno-error=undef is temporarily used because the build isn't clean regarding -Wundef warnings. The idea is that once the remaining -Wundef warnings have been cleaned up (in at least one configuration), -Wno-error=undef will be removed. I get a clean build and test on x86_64 (GCC 4.9 branch) with this patch. The expectation is that this may well break the build for some other configurations, and people seeing such breakage should make appropriate fixes to fix or suppress the warnings for their configurations. In some cases that may involve using pragmas as the right fix (I think that will be right for the -Wno-inline issue for MIPS I referred to in <https://sourceware.org/ml/libc-alpha/2012-11/msg00798.html>, for example), in some cases -Wno-error in sysdeps makefiles (__restore_rt in MIPS sigaction, for example), in some cases substantive fixes for the warnings. Note that if, with a view to listing all the warnings then fixing them all, you just look for "warning:" in output from building and testing with --disable-werror, you'll see lots of warnings from the linker about functions such as tmpnam. Those warnings can be ignored - only compiler warnings are relevant to -Werror, not linker warnings. * configure.ac (--disable-werror): New configure option. (enable_werror): New AC_SUBST. * configure: Regenerated. * config.make.in (enable-werror): New variable. * Makeconfig [$(enable-werror) = yes] (+gccwarn): Add -Werror -Wno-error=undef. (+gccwarn-c): Do not use -Werror=implicit-function-declaration. * manual/install.texi (Configuring and compiling): Document --disable-werror. * INSTALL: Regenerated. * debug/Makefile (CFLAGS-tst-chk1.c): Add -Wno-error. (CFLAGS-tst-chk2.c): Likewise. (CFLAGS-tst-chk3.c): Likewise. (CFLAGS-tst-chk4.cc): Likewise. (CFLAGS-tst-chk5.cc): Likewise. (CFLAGS-tst-chk6.cc): Likewise. (CFLAGS-tst-lfschk1.c): Likewise. (CFLAGS-tst-lfschk2.c): Likewise. (CFLAGS-tst-lfschk3.c): Likewise. (CFLAGS-tst-lfschk4.cc): Likewise. (CFLAGS-tst-lfschk5.cc): Likewise. (CFLAGS-tst-lfschk6.cc): Likewise.
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@item --disable-werror
By default, @theglibc{} is built with @option{-Werror}. If you wish
to build without this option (for example, if building with a newer
version of GCC than this version of @theglibc{} was tested with, so
new warnings cause the build with @option{-Werror} to fail), you can
configure with @option{--disable-werror}.
Start of series of patches with x86_64 vector math functions. Here is implementation of cos containing SSE, AVX, AVX2 and AVX512 versions according to Vector ABI which had been discussed in <https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>. Vector math library build and ABI testing enabled by default for x86_64. * sysdeps/x86_64/fpu/Makefile: New file. * sysdeps/x86_64/fpu/Versions: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.S: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.h: New file. * sysdeps/x86_64/fpu/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core_avx.S: New file. * sysdeps/x86_64/fpu/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/svml_d_wrapper_impl.h: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core_sse4.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core_avx2.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core_avx512.S: New file. * sysdeps/x86_64/fpu/multiarch/Makefile (libmvec-sysdep_routines): Added build of SSE, AVX2 and AVX512 IFUNC versions. * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration for cos. * math/bits/mathcalls.h: Added cos declaration with __MATHCALL_VEC. * sysdeps/x86_64/configure.ac: Options for libmvec build. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/sysdep.h (cfi_offset_rel_rsp): New macro. * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New file. * manual/install.texi (Configuring and compiling): Document --disable-mathvec. * INSTALL: Regenerated. * NEWS: Mention addition of libmvec and x86_64 vector cos.
2015-06-09 13:25:49 +02:00
@item --disable-mathvec
By default for x86_64, @theglibc{} is built with the vector math library.
Use this option to disable the vector math library.
Start of series of patches with x86_64 vector math functions. Here is implementation of cos containing SSE, AVX, AVX2 and AVX512 versions according to Vector ABI which had been discussed in <https://groups.google.com/forum/#!topic/x86-64-abi/LmppCfN1rZ4>. Vector math library build and ABI testing enabled by default for x86_64. * sysdeps/x86_64/fpu/Makefile: New file. * sysdeps/x86_64/fpu/Versions: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.S: New file. * sysdeps/x86_64/fpu/svml_d_cos_data.h: New file. * sysdeps/x86_64/fpu/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/svml_d_cos4_core_avx.S: New file. * sysdeps/x86_64/fpu/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/svml_d_wrapper_impl.h: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos2_core_sse4.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos4_core_avx2.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core.S: New file. * sysdeps/x86_64/fpu/multiarch/svml_d_cos8_core_avx512.S: New file. * sysdeps/x86_64/fpu/multiarch/Makefile (libmvec-sysdep_routines): Added build of SSE, AVX2 and AVX512 IFUNC versions. * sysdeps/x86/fpu/bits/math-vector.h: Added SIMD declaration for cos. * math/bits/mathcalls.h: Added cos declaration with __MATHCALL_VEC. * sysdeps/x86_64/configure.ac: Options for libmvec build. * sysdeps/x86_64/configure: Regenerated. * sysdeps/x86_64/sysdep.h (cfi_offset_rel_rsp): New macro. * sysdeps/unix/sysv/linux/x86_64/libmvec.abilist: New file. * manual/install.texi (Configuring and compiling): Document --disable-mathvec. * INSTALL: Regenerated. * NEWS: Mention addition of libmvec and x86_64 vector cos.
2015-06-09 13:25:49 +02:00
Add framework for tunables The tunables framework allows us to uniformly manage and expose global variables inside glibc as switches to users. tunables/README has instructions for glibc developers to add new tunables. Tunables support can be enabled by passing the --enable-tunables configure flag to the configure script. This patch only adds a framework and does not pose any limitations on how tunable values are read from the user. It also adds environment variables used in malloc behaviour tweaking to the tunables framework as a PoC of the compatibility interface. * manual/install.texi: Add --enable-tunables option. * INSTALL: Regenerate. * README.tunables: New file. * Makeconfig (CPPFLAGS): Define TOP_NAMESPACE. (before-compile): Generate dl-tunable-list.h early. * config.h.in: Add HAVE_TUNABLES. * config.make.in: Add have-tunables. * configure.ac: Add --enable-tunables option. * configure: Regenerate. * csu/init-first.c (__libc_init_first): Move __libc_init_secure earlier... * csu/init-first.c (LIBC_START_MAIN):... to here. Include dl-tunables.h, libc-internal.h. (LIBC_START_MAIN) [!SHARED]: Initialize tunables for static binaries. * elf/Makefile (dl-routines): Add dl-tunables. * elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE namespace. * elf/dl-support (_dl_nondynamic_init): Unset MALLOC_CHECK_ only when !HAVE_TUNABLES. * elf/rtld.c (process_envvars): Likewise. * elf/dl-sysdep.c [HAVE_TUNABLES]: Include dl-tunables.h (_dl_sysdep_start): Call __tunables_init. * elf/dl-tunable-types.h: New file. * elf/dl-tunables.c: New file. * elf/dl-tunables.h: New file. * elf/dl-tunables.list: New file. * malloc/tst-malloc-usable-static.c: New test case. * malloc/Makefile (tests-static): Add it. * malloc/arena.c [HAVE_TUNABLES]: Include dl-tunables.h. Define TUNABLE_NAMESPACE. (DL_TUNABLE_CALLBACK (set_mallopt_check)): New function. (DL_TUNABLE_CALLBACK_FNDECL): New macro. Use it to define callback functions. (ptmalloc_init): Set tunable values. * scripts/gen-tunables.awk: New file. * sysdeps/mach/hurd/dl-sysdep.c: Include dl-tunables.h. (_dl_sysdep_start): Call __tunables_init.
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@item --enable-tunables
Tunables support allows additional library parameters to be customized at
runtime. This feature is enabled by default. This option can take the
following values:
Enhance --enable-tunables to select tunables frontend at build time At the GNU Tools Cauldron 2016, the state of the current tunables patchset was considered OK with the addition of a way to select the frontend to be used for the tunables. That is, to avoid being locked in to one type of frontend initially, it should be possible to build tunables with a different frontend with something as simple as a configure switch. To that effect, this patch enhances the --enable-tunables option to accept more values than just 'yes' or 'no'. The current frontend (and default when enable-tunables is 'yes') is called 'valstring', to select the frontend where a single environment variable is set to a colon-separated value string. More such frontends can be added in future. * Makeconfig (have-tunables): Check for non-negative instead of positive. * configure.ac: Add 'valstring' as a valid value for --enable-tunables. * configure: Regenerate. * elf/Makefile (have-tunables): Check for non-negative instead of positive. (CPPFLAGS-dl-tunables.c): Define TUNABLES_FRONTEND for dl-tunables.c. * elf/dl-tunables.c (GLIBC_TUNABLES): Define only when TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. (tunables_strdup): Likewise. (disable_tunables): Likewise. (parse_tunables): Likewise. (__tunables_init): Process GLIBC_TUNABLES envvar only when. TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. * elf/dl-tunables.h (TUNABLES_FRONTEND_valstring): New macro. (TUNABLES_FRONTEND_yes): New macro, define as TUNABLES_FRONTEND_valstring by default. * manual/install.texi: Document new acceptable values for --enable-tunables. * INSTALL: Regenerate.
2016-12-31 19:04:04 +01:00
@table @code
@item yes
This is the default if no option is passed to configure. This enables tunables
Enhance --enable-tunables to select tunables frontend at build time At the GNU Tools Cauldron 2016, the state of the current tunables patchset was considered OK with the addition of a way to select the frontend to be used for the tunables. That is, to avoid being locked in to one type of frontend initially, it should be possible to build tunables with a different frontend with something as simple as a configure switch. To that effect, this patch enhances the --enable-tunables option to accept more values than just 'yes' or 'no'. The current frontend (and default when enable-tunables is 'yes') is called 'valstring', to select the frontend where a single environment variable is set to a colon-separated value string. More such frontends can be added in future. * Makeconfig (have-tunables): Check for non-negative instead of positive. * configure.ac: Add 'valstring' as a valid value for --enable-tunables. * configure: Regenerate. * elf/Makefile (have-tunables): Check for non-negative instead of positive. (CPPFLAGS-dl-tunables.c): Define TUNABLES_FRONTEND for dl-tunables.c. * elf/dl-tunables.c (GLIBC_TUNABLES): Define only when TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. (tunables_strdup): Likewise. (disable_tunables): Likewise. (parse_tunables): Likewise. (__tunables_init): Process GLIBC_TUNABLES envvar only when. TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. * elf/dl-tunables.h (TUNABLES_FRONTEND_valstring): New macro. (TUNABLES_FRONTEND_yes): New macro, define as TUNABLES_FRONTEND_valstring by default. * manual/install.texi: Document new acceptable values for --enable-tunables. * INSTALL: Regenerate.
2016-12-31 19:04:04 +01:00
and selects the default frontend (currently @samp{valstring}).
@item no
This option disables tunables.
Enhance --enable-tunables to select tunables frontend at build time At the GNU Tools Cauldron 2016, the state of the current tunables patchset was considered OK with the addition of a way to select the frontend to be used for the tunables. That is, to avoid being locked in to one type of frontend initially, it should be possible to build tunables with a different frontend with something as simple as a configure switch. To that effect, this patch enhances the --enable-tunables option to accept more values than just 'yes' or 'no'. The current frontend (and default when enable-tunables is 'yes') is called 'valstring', to select the frontend where a single environment variable is set to a colon-separated value string. More such frontends can be added in future. * Makeconfig (have-tunables): Check for non-negative instead of positive. * configure.ac: Add 'valstring' as a valid value for --enable-tunables. * configure: Regenerate. * elf/Makefile (have-tunables): Check for non-negative instead of positive. (CPPFLAGS-dl-tunables.c): Define TUNABLES_FRONTEND for dl-tunables.c. * elf/dl-tunables.c (GLIBC_TUNABLES): Define only when TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. (tunables_strdup): Likewise. (disable_tunables): Likewise. (parse_tunables): Likewise. (__tunables_init): Process GLIBC_TUNABLES envvar only when. TUNABLES_FRONTEND == TUNABLES_FRONTEND_valstring. * elf/dl-tunables.h (TUNABLES_FRONTEND_valstring): New macro. (TUNABLES_FRONTEND_yes): New macro, define as TUNABLES_FRONTEND_valstring by default. * manual/install.texi: Document new acceptable values for --enable-tunables. * INSTALL: Regenerate.
2016-12-31 19:04:04 +01:00
@item valstring
This enables tunables and selects the @samp{valstring} frontend for tunables.
This frontend allows users to specify tunables as a colon-separated list in a
single environment variable @env{GLIBC_TUNABLES}.
@end table
Add framework for tunables The tunables framework allows us to uniformly manage and expose global variables inside glibc as switches to users. tunables/README has instructions for glibc developers to add new tunables. Tunables support can be enabled by passing the --enable-tunables configure flag to the configure script. This patch only adds a framework and does not pose any limitations on how tunable values are read from the user. It also adds environment variables used in malloc behaviour tweaking to the tunables framework as a PoC of the compatibility interface. * manual/install.texi: Add --enable-tunables option. * INSTALL: Regenerate. * README.tunables: New file. * Makeconfig (CPPFLAGS): Define TOP_NAMESPACE. (before-compile): Generate dl-tunable-list.h early. * config.h.in: Add HAVE_TUNABLES. * config.make.in: Add have-tunables. * configure.ac: Add --enable-tunables option. * configure: Regenerate. * csu/init-first.c (__libc_init_first): Move __libc_init_secure earlier... * csu/init-first.c (LIBC_START_MAIN):... to here. Include dl-tunables.h, libc-internal.h. (LIBC_START_MAIN) [!SHARED]: Initialize tunables for static binaries. * elf/Makefile (dl-routines): Add dl-tunables. * elf/Versions (ld): Add __tunable_set_val to GLIBC_PRIVATE namespace. * elf/dl-support (_dl_nondynamic_init): Unset MALLOC_CHECK_ only when !HAVE_TUNABLES. * elf/rtld.c (process_envvars): Likewise. * elf/dl-sysdep.c [HAVE_TUNABLES]: Include dl-tunables.h (_dl_sysdep_start): Call __tunables_init. * elf/dl-tunable-types.h: New file. * elf/dl-tunables.c: New file. * elf/dl-tunables.h: New file. * elf/dl-tunables.list: New file. * malloc/tst-malloc-usable-static.c: New test case. * malloc/Makefile (tests-static): Add it. * malloc/arena.c [HAVE_TUNABLES]: Include dl-tunables.h. Define TUNABLE_NAMESPACE. (DL_TUNABLE_CALLBACK (set_mallopt_check)): New function. (DL_TUNABLE_CALLBACK_FNDECL): New macro. Use it to define callback functions. (ptmalloc_init): Set tunable values. * scripts/gen-tunables.awk: New file. * sysdeps/mach/hurd/dl-sysdep.c: Include dl-tunables.h. (_dl_sysdep_start): Call __tunables_init.
2016-12-31 19:02:17 +01:00
Deprecate libnsl by default (only shared library will be build for backward compatibility, no linking possible) and disable building of libnss_compat, libnss_nis and libnss_nisplus, except --enable-obsolete-nsl option is given to configure. * config.h.in: Add LINK_OBSOLETE_NSL. * config.make.in: Add build-obsolete-nsl. * configure.ac: Add obsolete-nsl option. * include/libc-symbols.h: Define libnsl_hidden_nolink_def. * include/rpcsvc/yp.h: Add missing functions as libnsl_hidden_proto. * include/rpcsvc/nislib.h: Likewise. * include/rpcsvc/ypclnt.h: Likewise. * manual/install.texi: Document --enable-obsolete-nsl. * nis/Makefile: Build only libnsl by default (add build-obsolete-nsl). * nis/nis_add.c: Replace libnsl_hidden_def with libnsl_hidden_nolink_def. * nis/nis_addmember.c: Likewise. * nis/nis_call.c: Likewise. * nis/nis_clone_obj.c: Likewise. * nis/nis_defaults.c: Likeise. * nis/nis_domain_of_r.c: Likewise. * nis/nis_error.c: Likewise. * nis/nis_file.c: Likewise. * nis/nis_free.c: Likewise. * nis_local_names.c: Likewise. * nis/nis_lookup.c: Likewise. * nis/nis_modify.c: Likewise. * nis/nis_print.c: Likewise. * nis/nis_remove.c: Likewise. * nis/nis_table.c: Likewise. * nis/nis_util.c: Likewise. * nis/nis_xdr.c: Likewise. * nis/yp_xdr.c: Likewise. * nis/ypclnt.c: Likewise. * nis/ypupdate_xdr.c: Likewise. * nis/nis_checkpoint.c: Add libnsl_hidden_nolink_def to all functions. * nis/nis_clone_dir.c: Likewise. * nis/nis_clone_res.c: Likewise. * nis/nis_creategroup.c: Likewise. * nis/nis_destroygroup.c: Likewise. * nis/nis_domain_of.c: Likewise. * nis/nis_getservlist.c: Likewise. * nis/nis_ismember.c: Likewise. * nis/nis_mkdir.c: Likewise. * nis/nis_ping.c: Likewise. * nis/nis_print_group_entry.c: Likewise. * nis/nis_removemember.c: Likewise. * nis/nis_rmdir.c: Likewise. * nis/nis_server.c: Likewise. * nis/nis_subr.c: Likewise. * nis/nis_verifygroup.c: Likewise. Signed-off-by: Thorsten Kukuk <kukuk@suse.com>
2017-03-21 15:14:27 +01:00
@item --enable-obsolete-nsl
By default, libnsl is only built as shared library for backward
compatibility and the NSS modules libnss_compat, libnss_nis and
libnss_nisplus are not built at all.
Use this option to enable libnsl with all depending NSS modules and
header files.
@item --build=@var{build-system}
@itemx --host=@var{host-system}
These options are for cross-compiling. If you specify both options and
@var{build-system} is different from @var{host-system}, @code{configure}
will prepare to cross-compile @theglibc{} from @var{build-system} to be used
on @var{host-system}. You'll probably need the @samp{--with-headers}
option too, and you may have to override @var{configure}'s selection of
the compiler and/or binutils.
If you only specify @samp{--host}, @code{configure} will prepare for a
native compile but use what you specify instead of guessing what your
system is. This is most useful to change the CPU submodel. For example,
if @code{configure} guesses your machine as @code{i686-pc-linux-gnu} but
you want to compile a library for 586es, give
@samp{--host=i586-pc-linux-gnu} or just @samp{--host=i586-linux} and add
the appropriate compiler flags (@samp{-mcpu=i586} will do the trick) to
@var{CFLAGS}.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
If you specify just @samp{--build}, @code{configure} will get confused.
@item --with-pkgversion=@var{version}
Specify a description, possibly including a build number or build
date, of the binaries being built, to be included in
@option{--version} output from programs installed with @theglibc{}.
For example, @option{--with-pkgversion='FooBar GNU/Linux glibc build
123'}. The default value is @samp{GNU libc}.
@item --with-bugurl=@var{url}
Specify the URL that users should visit if they wish to report a bug,
to be included in @option{--help} output from programs installed with
@theglibc{}. The default value refers to the main bug-reporting
information for @theglibc{}.
@end table
To build the library and related programs, type @code{make}. This will
produce a lot of output, some of which may look like errors from
@code{make} but aren't. Look for error messages from @code{make}
containing @samp{***}. Those indicate that something is seriously wrong.
The compilation process can take a long time, depending on the
configuration and the speed of your machine. Some complex modules may
take a very long time to compile, as much as several minutes on slower
machines. Do not panic if the compiler appears to hang.
If you want to run a parallel make, simply pass the @samp{-j} option
with an appropriate numeric parameter to @code{make}. You need a recent
GNU @code{make} version, though.
To build and run test programs which exercise some of the library
facilities, type @code{make check}. If it does not complete
successfully, do not use the built library, and report a bug after
verifying that the problem is not already known. @xref{Reporting Bugs},
for instructions on reporting bugs. Note that some of the tests assume
they are not being run by @code{root}. We recommend you compile and
test @theglibc{} as an unprivileged user.
Before reporting bugs make sure there is no problem with your system.
The tests (and later installation) use some pre-existing files of the
system such as @file{/etc/passwd}, @file{/etc/nsswitch.conf} and others.
These files must all contain correct and sensible content.
Do not terminate default test runs on test failure. This patch is an updated version of <https://sourceware.org/ml/libc-alpha/2014-01/msg00198.html> and <https://sourceware.org/ml/libc-alpha/2014-03/msg00180.html>. Normal practice for software testsuites is that rather than terminating immediately when a test fails, they continue running and report at the end on how many tests passed or failed. The principle behind the glibc testsuite stopping on failure was probably that the expected state is no failures and so any failure indicates a problem such as miscompilation. In practice, while this is fairly close to true for native testing on x86_64 and x86 (kernel bugs and race conditions can still cause intermittent failures), it's less likely to be the case on other platforms, and so people testing glibc run the testsuite with "make -k" and then examine the logs to determine whether the failures are what they expect to fail on that platform, possibly with some automation for the comparison. This patch switches the glibc testsuite to the normal convention of not stopping on failure - unless you use stop-on-test-failure=y, in which case it behaves essentially as it did before (and does not generate overall test summaries on failure). Instead, the summary tests.sum may contain tests that FAILed. At the end of the test run, any FAIL or ERROR lines from tests.sum are printed, and then it exits with error status if there were any such lines. In addition, build failures will also cause the test run to stop - this has the justification that those *do* indicate serious problems that should be promptly fixed and aren't generally hard to fix (but apart from that, avoiding the build stopping on those failures seems harder). Note that unlike the previous patches in this series, this *does* require people with automation around testing glibc to change their processes - either to start using tests.sum / xtests.sum to track failures and compare them with expectations (with or without also using "make -k" and examining "make" logs to identify build failures), or else to use stop-on-test-failure=y and ignore the new tests.sum / xtests.sum mechanism. (If all you check is the exit status from "make check", no changes are needed unless you want to avoid test runs continuing after the first failure.) Tested x86_64. * scripts/evaluate-test.sh: Handle fourth argument to determine whether test run should stop on failure. * Makeconfig (stop-on-test-failure): New variable. (evaluate-test): Pass fourth argument to evaluate-test.sh based on $(stop-on-test-failure). * Makefile (tests): Give a summary of results from testing and exit with failure status if they include an ERROR or FAIL. (xtests): Likewise. * manual/install.texi (Configuring and compiling): Mention stop-on-test-failure=y. * INSTALL: Regenerated.
2014-03-14 22:02:40 +01:00
Normally, @code{make check} will run all the tests before reporting
all problems found and exiting with error status if any problems
occurred. You can specify @samp{stop-on-test-failure=y} when running
@code{make check} to make the test run stop and exit with an error
status immediately when a failure occurs.
Add pretty printers for the NPTL lock types This patch adds pretty printers for the following NPTL types: - pthread_mutex_t - pthread_mutexattr_t - pthread_cond_t - pthread_condattr_t - pthread_rwlock_t - pthread_rwlockattr_t To load the pretty printers into your gdb session, do the following: python import sys sys.path.insert(0, '/path/to/glibc/build/nptl/pretty-printers') end source /path/to/glibc/source/pretty-printers/nptl-printers.py You can check which printers are registered and enabled by issuing the 'info pretty-printer' gdb command. Printers should trigger automatically when trying to print a variable of one of the types mentioned above. The printers are architecture-independent, and were tested on an AMD64 running Ubuntu 14.04 and an x86 VM running Fedora 24. In order to work, the printers need to know the values of various flags that are scattered throughout pthread.h and pthreadP.h as enums and #defines. Since replicating these constants in the printers file itself would create a maintenance burden, I wrote a script called gen-py-const.awk that Makerules uses to extract the constants. This script is pretty much the same as gen-as-const.awk, except it doesn't cast the constant values to 'long' and is thorougly documented. The constants need only to be enumerated in a .pysym file, which is then referenced by a Make variable called gen-py-const-headers. As for the install directory, I discussed this with Mike Frysinger and Siddhesh Poyarekar, and we agreed that it can be handled in a separate patch, and shouldn't block merging of this one. In addition, I've written a series of test cases for the pretty printers. Each lock type (mutex, condvar and rwlock) has two test programs, one for itself and other for its related 'attributes' object. Each test program in turn has a PExpect-based Python script that drives gdb and compares its output to the expected printer's. The tests run on the glibc host, which is assumed to have both gdb and PExpect; if either is absent the tests will fail with code 77 (UNSUPPORTED). For cross-testing you should use cross-test-ssh.sh as test-wrapper. I've tested the printers on both native builds and a cross build using a Beaglebone Black running Debian, with the build system's filesystem shared with the board through NFS. Finally, I've written a README that explains all this and more. * INSTALL: Regenerated. * Makeconfig: Add comments and whitespace to make the control flow clearer. (+link-printers-tests, +link-pie-printers-tests, CFLAGS-printers-tests, installed-rtld-LDFLAGS, built-rtld-LDFLAGS, link-libc-rpath, link-libc-tests-after-rpath-link, link-libc-printers-tests): New. (rtld-LDFLAGS, rtld-tests-LDFLAGS, link-libc-tests-rpath-link, link-libc-tests): Use the new variables as required. * Makerules ($(py-const)): New rule. generated: Add $(py-const). * README.pretty-printers: New file. * Rules (tests-printers-programs, tests-printers-out, py-env): New. (others): Depend on $(py-const). (tests): Depend on $(tests-printers-programs) or $(tests-printers-out), as required. Pass $(tests-printers) to merge-test-results.sh. * manual/install.texi: Add requirements for testing the pretty printers. * nptl/Makefile (gen-py-const-headers, pretty-printers, tests-printers, CFLAGS-test-mutexattr-printers.c CFLAGS-test-mutex-printers.c, CFLAGS-test-condattr-printers.c, CFLAGS-test-cond-printers.c, CFLAGS-test-rwlockattr-printers.c CFLAGS-test-rwlock-printers.c, tests-printers-libs): Define. * nptl/nptl-printers.py: New file. * nptl/nptl_lock_constants.pysym: Likewise. * nptl/test-cond-printers.c: Likewise. * nptl/test-cond-printers.py: Likewise. * nptl/test-condattr-printers.c: Likewise. * nptl/test-condattr-printers.py: Likewise. * nptl/test-mutex-printers.c: Likewise. * nptl/test-mutex-printers.py: Likewise. * nptl/test-mutexattr-printers.c: Likewise. * nptl/test-mutexattr-printers.py: Likewise. * nptl/test-rwlock-printers.c: Likewise. * nptl/test-rwlock-printers.py: Likewise. * nptl/test-rwlockattr-printers.c: Likewise. * nptl/test-rwlockattr-printers.py: Likewise. * scripts/gen-py-const.awk: Likewise. * scripts/test_printers_common.py: Likewise. * scripts/test_printers_exceptions.py: Likewise.
2016-12-08 14:29:02 +01:00
The @glibcadj{} pretty printers come with their own set of scripts for testing,
which run together with the rest of the testsuite through @code{make check}.
These scripts require the following tools to run successfully:
@itemize @bullet
@item
Python 2.7.6/3.4.3 or later
Python is required for running the printers' test scripts.
@item PExpect 4.0
The printer tests drive GDB through test programs and compare its output
to the printers'. PExpect is used to capture the output of GDB, and should be
compatible with the Python version in your system.
@item
GDB 7.8 or later with support for Python 2.7.6/3.4.3 or later
GDB itself needs to be configured with Python support in order to use the
pretty printers. Notice that your system having Python available doesn't imply
that GDB supports it, nor that your system's Python and GDB's have the same
version.
@end itemize
@noindent
If these tools are absent, the printer tests will report themselves as
@code{UNSUPPORTED}. Notice that some of the printer tests require @theglibc{}
to be compiled with debugging symbols.
To format the @cite{GNU C Library Reference Manual} for printing, type
@w{@code{make dvi}}. You need a working @TeX{} installation to do
this. The distribution builds the on-line formatted version of the
manual, as Info files, as part of the build process. You can build
them manually with @w{@code{make info}}.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
The library has a number of special-purpose configuration parameters
which you can find in @file{Makeconfig}. These can be overwritten with
the file @file{configparms}. To change them, create a
@file{configparms} in your build directory and add values as appropriate
for your system. The file is included and parsed by @code{make} and has
to follow the conventions for makefiles.
It is easy to configure @theglibc{} for cross-compilation by
setting a few variables in @file{configparms}. Set @code{CC} to the
cross-compiler for the target you configured the library for; it is
important to use this same @code{CC} value when running
@code{configure}, like this: @samp{CC=@var{target}-gcc configure
@var{target}}. Set @code{BUILD_CC} to the compiler to use for programs
run on the build system as part of compiling the library. You may need to
2011-02-15 20:52:29 +01:00
set @code{AR} to cross-compiling versions of @code{ar}
if the native tools are not configured to work with
2012-10-25 21:17:45 +02:00
object files for the target you configured for. When cross-compiling
@theglibc{}, it may be tested using @samp{make check
test-wrapper="@var{srcdir}/scripts/cross-test-ssh.sh @var{hostname}"},
where @var{srcdir} is the absolute directory name for the main source
directory and @var{hostname} is the host name of a system that can run
the newly built binaries of @theglibc{}. The source and build
directories must be visible at the same locations on both the build
system and @var{hostname}.
In general, when testing @theglibc{}, @samp{test-wrapper} may be set
to the name and arguments of any program to run newly built binaries.
This program must preserve the arguments to the binary being run, its
Don't require test wrappers to preserve environment variables, use more consistent environment. One wart in the original support for test wrappers for cross testing, as noted in <https://sourceware.org/ml/libc-alpha/2012-10/msg00722.html>, is the requirement for test wrappers to pass a poorly-defined set of environment variables from the build system to the system running the glibc under test. Although some variables are passed explicitly via $(test-wrapper-env), including LD_* variables that simply can't be passed implicitly because of the side effects they'd have on the build system's dynamic linker, others are passed implicitly, including variables such as GCONV_PATH and LOCPATH that could potentially affect the build system's libc (so effectively relying on any such effects not breaking the wrappers). In addition, the code in cross-test-ssh.sh for preserving environment variables is fragile (it depends on how bash formats a list of exported variables, and could well break for multi-line variable definitions where the contents contain things looking like other variable definitions). This patch moves to explicitly passing environment variables via $(test-wrapper-env). Makefile variables that previously used $(test-wrapper) are split up into -before-env and -after-env parts that can be passed separately to the various .sh files used in testing, so those files can then insert environment settings between the two parts. The common default environment settings in make-test-out are made into a separate makefile variable that can also be passed to scripts, rather than many scripts duplicating those settings (for testing an installed glibc, it is desirable to have the GCONV_PATH setting on just one place, so just that one place needs to support it pointing to an installed sysroot instead of the build tree). The default settings are included in the variables such as $(test-program-prefix), so that if tests do not need any non-default settings they can continue to use single variables rather than the split-up variables. Although this patch cleans up LC_ALL=C settings (that being part of the common defaults), various LANG=C and LANGUAGE=C settings remain. Those are generally unnecessary and I propose a subsequent cleanup to remove them. LC_ALL takes precedence over LANG, and while LANGUAGE takes precedence over LC_ALL, it only does so for settings other than LC_ALL=C. So LC_ALL=C on its own is sufficient to ensure the C locale, and anything that gets LC_ALL=C does not need the other settings. While preparing this patch I noticed some tests with .sh files that appeared to do nothing beyond what the generic makefile support for tests can do (localedata/tst-wctype.sh - the makefiles support -ENV variables and .input files - and localedata/tst-mbswcs.sh - just runs five tests that could be run individually from the makefile). So I propose another subsequent cleanup to move those to using the generic support instead of special .sh files. Tested x86_64 (native) and powerpc32 (cross). * Makeconfig (run-program-env): New variable. (run-program-prefix-before-env): Likewise. (run-program-prefix-after-env): Likewise. (run-program-prefix): Define in terms of new variables. (built-program-cmd-before-env): New variable. (built-program-cmd-after-env): Likewise. (built-program-cmd): Define in terms of new variables. (test-program-prefix-before-env): New variable. (test-program-prefix-after-env): Likewise. (test-program-prefix): Define in terms of new variables. (test-program-cmd-before-env): New variable. (test-program-cmd-after-env): Likewise. (test-program-cmd): Define in terms of new variables. * Rules (make-test-out): Use $(run-program-env). * scripts/cross-test-ssh.sh (env_blacklist): Remove variable. (help): Do not mention environment variables. Mention --timeoutfactor option. (timeoutfactor): New variable. (blacklist_exports): Remove function. (exports): Remove variable. (command): Do not include ${exports}. * manual/install.texi (Configuring and compiling): Do not mention test wrappers preserving environment variables. Mention that last assignment to a variable must take precedence. * INSTALL: Regenerated. * benchtests/Makefile (run-bench): Use $(run-program-env). * catgets/Makefile ($(objpfx)test1.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test2.cat): Do not specify environment variables explicitly. ($(objpfx)de/libc.cat): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)test-gencat.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)sample.SJIS.cat): Do not specify environment variables explicitly. * catgets/test-gencat.sh: Use test_program_cmd_before_env, run_program_env and test_program_cmd_after_env arguments. * elf/Makefile ($(objpfx)tst-pathopt.out): Use $(run-program-env). * elf/tst-pathopt.sh: Use run_program_env argument. * iconvdata/Makefile ($(objpfx)iconv-test.out): Use $(test-wrapper-env) and $(run-program-env). * iconvdata/run-iconv-test.sh: Use test_wrapper_env and run_program_env arguments. * iconvdata/tst-table.sh: Do not set GCONV_PATH explicitly. * intl/Makefile ($(objpfx)tst-gettext.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-gettext2.out): Likewise. * intl/tst-gettext.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * intl/tst-gettext2.sh: Likewise. * intl/tst-gettext4.sh: Do not set environment variables explicitly. * intl/tst-gettext6.sh: Likewise. * intl/tst-translit.sh: Likewise. * malloc/Makefile ($(objpfx)tst-mtrace.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * malloc/tst-mtrace.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * math/Makefile (run-regen-ulps): Use $(run-program-env). * nptl/Makefile ($(objpfx)tst-tls6.out): Use $(run-program-env). * nptl/tst-tls6.sh: Use run_program_env argument. Set LANG=C explicitly with each use of ${test_wrapper_env}. * posix/Makefile ($(objpfx)wordexp-tst.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * posix/tst-getconf.sh: Do not set environment variables explicitly. * posix/wordexp-tst.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * stdio-common/tst-printf.sh: Do not set environment variables explicitly. * stdlib/Makefile ($(objpfx)tst-fmtmsg.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). * stdlib/tst-fmtmsg.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. Split $test calls into $test_pre and $test. * timezone/Makefile (build-testdata): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). localedata/ChangeLog: * Makefile ($(addprefix $(objpfx),$(CTYPE_FILES))): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)sort-test.out): Use $(test-program-prefix-before-env), $(run-program-env) and $(test-program-prefix-after-env). ($(objpfx)tst-fmon.out): Use $(run-program-prefix-before-env), $(run-program-env) and $(run-program-prefix-after-env). ($(objpfx)tst-locale.out): Use $(built-program-cmd-before-env), $(run-program-env) and $(built-program-cmd-after-env). ($(objpfx)tst-trans.out): Use $(run-program-prefix-before-env), $(run-program-env), $(run-program-prefix-after-env), $(test-program-prefix-before-env) and $(test-program-prefix-after-env). ($(objpfx)tst-ctype.out): Use $(test-program-cmd-before-env), $(run-program-env) and $(test-program-cmd-after-env). ($(objpfx)tst-wctype.out): Likewise. ($(objpfx)tst-langinfo.out): Likewise. ($(objpfx)tst-langinfo-static.out): Likewise. * gen-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * sort-test.sh: Use test_program_prefix_before_env, run_program_env and test_program_prefix_after_env arguments. * tst-ctype.sh: Use tst_ctype_before_env, run_program_env and tst_ctype_after_env arguments. * tst-fmon.sh: Use run_program_prefix_before_env, run_program_env and run_program_prefix_after_env arguments. * tst-langinfo.sh: Use tst_langinfo_before_env, run_program_env and tst_langinfo_after_env arguments. * tst-locale.sh: Use localedef_before_env, run_program_env and localedef_after_env arguments. * tst-mbswcs.sh: Do not set environment variables explicitly. * tst-numeric.sh: Likewise. * tst-rpmatch.sh: Likewise. * tst-trans.sh: Use run_program_prefix_before_env, run_program_env, run_program_prefix_after_env, test_program_prefix_before_env and test_program_prefix_after_env arguments. * tst-wctype.sh: Use tst_wctype_before_env, run_program_env and tst_wctype_after_env arguments.
2014-06-07 00:19:27 +02:00
working directory and the standard input, output and error file
descriptors. If @samp{@var{test-wrapper} env} will not work to run a
program with environment variables set, then @samp{test-wrapper-env}
must be set to a program that runs a newly built program with
environment variable assignments in effect, those assignments being
specified as @samp{@var{var}=@var{value}} before the name of the
program to be run. If multiple assignments to the same variable are
specified, the last assignment specified must take precedence.
Similarly, if @samp{@var{test-wrapper} env -i} will not work to run a
program with an environment completely empty of variables except those
directly assigned, then @samp{test-wrapper-env-only} must be set; its
use has the same syntax as @samp{test-wrapper-env}, the only
difference in its semantics being starting with an empty set of
environment variables rather than the ambient set.
@node Running make install
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@appendixsec Installing the C Library
@cindex installing
To install the library and its header files, and the Info files of the
Remove redundant C locale settings. Various glibc build / install / test code has C locale settings that are redundant with LC_ALL=C. LC_ALL takes precedence over LANG, so anywhere that sets LC_ALL=C (explicitly, or through it being in the default environment for running tests) does not need to set LANG=C. LC_ALL=C also takes precedence over LANGUAGE, since 2001-01-02 Ulrich Drepper <drepper@redhat.com> * intl/dcigettext.c (guess_category_value): Rewrite so that LANGUAGE value is ignored if the selected locale is the C locale. * intl/tst-gettext.c: Set locale for above change. * intl/tst-translit.c: Likewise. and so settings of LANGUAGE=C are also redundant when LC_ALL=C is set. One test also had LC_ALL=C in its -ENV setting, although it's part of the default environment used for tests. This patch removes the redundant settings. It removes a suggestion in install.texi of setting LANGUAGE=C LC_ALL=C for "make install"; the Makefile.in target "install" already sets LC_ALL_C so there's no need for the user to set it (and nor should there be any need for the user to set it). If some build machine tool used by "make install" uses a version of libintl predating that 2001 change, and the user has LANGUAGE set, the removal of LANGUAGE=C from the Makefile.in "install" rule could in principle affect the user's installation. However, I don't think we need to be concerned about pre-2001 build tools. Tested x86_64. * Makefile (install): Don't set LANGUAGE. * Makefile.in (install): Likewise. * assert/Makefile (test-assert-ENV): Remove variable. (test-assert-perr-ENV): Likewise. * elf/Makefile (neededtest4-ENV): Likewise. * iconvdata/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Don't set LANGUAGE. * io/ftwtest-sh (LANG): Remove variable. * libio/Makefile (tst-widetext-ENV): Likewise. * manual/install.texi (Running make install): Don't refer to environment settings for make install. * INSTALL: Regenerated. * nptl/tst-tls6.sh: Don't set LANG. * posix/globtest.sh (LANG): Remove variable. * string/Makefile (tester-ENV): Likewise. (inl-tester-ENV): Likewise. (noinl-tester-ENV): Likewise. * sysdeps/s390/s390-64/Makefile ($(inst_gconvdir)/gconv-modules) [$(cross-compiling) = no]: Don't set LANGUAGE. * timezone/Makefile (build-testdata): Use $(built-program-cmd) without explicit environment settings. localedata/ChangeLog: * tst-fmon.sh: Don't set LANGUAGE. * tst-locale.sh: Likewise.
2014-06-07 21:58:36 +02:00
manual, type @code{make install}. This will
build things, if necessary, before installing them; however, you should
still compile everything first. If you are installing @theglibc{} as your
primary C library, we recommend that you shut the system down to
single-user mode first, and reboot afterward. This minimizes the risk
of breaking things when the library changes out from underneath.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@samp{make install} will do the entire job of upgrading from a
previous installation of @theglibc{} version 2.x. There may sometimes
be headers
left behind from the previous installation, but those are generally
harmless. If you want to avoid leaving headers behind you can do
things in the following order.
You must first build the library (@samp{make}), optionally check it
(@samp{make check}), switch the include directories and then install
(@samp{make install}). The steps must be done in this order. Not moving
the directory before install will result in an unusable mixture of header
files from both libraries, but configuring, building, and checking the
library requires the ability to compile and run programs against the old
library. The new @file{/usr/include}, after switching the include
directories and before installing the library should contain the Linux
headers, but nothing else. If you do this, you will need to restore
any headers from libraries other than @theglibc{} yourself after installing the
2000-03-26 08:03:42 +02:00
library.
You can install @theglibc{} somewhere other than where you configured
it to go by setting the @code{DESTDIR} GNU standard make variable on
the command line for @samp{make install}. The value of this variable
is prepended to all the paths for installation. This is useful when
setting up a chroot environment or preparing a binary distribution.
The directory should be specified with an absolute file name. Installing
with the @code{prefix} and @code{exec_prefix} GNU standard make variables
set is not supported.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@Theglibc{} includes a daemon called @code{nscd}, which you
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
may or may not want to run. @code{nscd} caches name service lookups; it
can dramatically improve performance with NIS+, and may help with DNS as
well.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
One auxiliary program, @file{/usr/libexec/pt_chown}, is installed setuid
@code{root} if the @samp{--enable-pt_chown} configuration option is used.
This program is invoked by the @code{grantpt} function; it sets the
permissions on a pseudoterminal so it can be used by the calling process.
If you are using a Linux kernel with the @code{devpts} filesystem enabled
and mounted at @file{/dev/pts}, you don't need this program.
After installation you might want to configure the timezone and locale
installation of your system. @Theglibc{} comes with a locale
database which gets configured with @code{localedef}. For example, to
set up a German locale with name @code{de_DE}, simply issue the command
@samp{localedef -i de_DE -f ISO-8859-1 de_DE}. To configure all locales
that are supported by @theglibc{}, you can issue from your build directory the
command @samp{make localedata/install-locales}.
To configure the locally used timezone, set the @code{TZ} environment
variable. The script @code{tzselect} helps you to select the right value.
As an example, for Germany, @code{tzselect} would tell you to use
@samp{TZ='Europe/Berlin'}. For a system wide installation (the given
paths are for an installation with @samp{--prefix=/usr}), link the
timezone file which is in @file{/usr/share/zoneinfo} to the file
@file{/etc/localtime}. For Germany, you might execute @samp{ln -s
/usr/share/zoneinfo/Europe/Berlin /etc/localtime}.
@node Tools for Compilation
@appendixsec Recommended Tools for Compilation
@cindex installation tools
@cindex tools, for installing library
We recommend installing the following GNU tools before attempting to
build @theglibc{}:
@itemize @bullet
@item
GNU @code{make} 3.79 or newer
You need the latest version of GNU @code{make}. Modifying @theglibc{}
to work with other @code{make} programs would be so difficult that
we recommend you port GNU @code{make} instead. @strong{Really.} We
recommend GNU @code{make} version 3.79. All earlier versions have severe
bugs or lack features.
@item
GCC 4.9 or newer
2012-02-28 00:07:59 +01:00
GCC 4.9 or higher is required. In general it is recommended to use
the newest version of the compiler that is known to work for building
@theglibc{}, as newer compilers usually produce better code. As of
release time, GCC 6.3 is the newest compiler verified to work to build
@theglibc{}.
For PowerPC 64-bits little-endian (powerpc64le), GCC 6.2 or higher is
required. This compiler version is the first to provide the features
required for building @theglibc{} with support for @code{_Float128}.
For multi-arch support it is recommended to use a GCC which has been built with
support for GNU indirect functions. This ensures that correct debugging
information is generated for functions selected by IFUNC resolvers. This
support can either be enabled by configuring GCC with
@samp{--enable-gnu-indirect-function}, or by enabling it by default by setting
@samp{default_gnu_indirect_function} variable for a particular architecture in
the GCC source file @file{gcc/config.gcc}.
You can use whatever compiler you like to compile programs that use
@theglibc{}.
Check the FAQ for any special compiler issues on particular platforms.
@item
GNU @code{binutils} 2.22 or later
You must use GNU @code{binutils} (as and ld) to build @theglibc{}.
No other assembler or linker has the necessary functionality at the
moment. As of release time, GNU @code{binutils} 2.25 is the newest
verified to work to build @theglibc{}.
@item
GNU @code{texinfo} 4.7 or later
To correctly translate and install the Texinfo documentation you need
this version of the @code{texinfo} package. Earlier versions do not
understand all the tags used in the document, and the installation
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
mechanism for the info files is not present or works differently.
As of release time, @code{texinfo} 6.0 is the newest verified to work
to build @theglibc{}.
@item
GNU @code{awk} 3.1.2, or higher
@code{awk} is used in several places to generate files.
Some @code{gawk} extensions are used, including the @code{asorti}
function, which was introduced in version 3.1.2 of @code{gawk}.
As of release time, @code{gawk} version 4.1.3 is the newest verified
to work to build @theglibc{}.
@item
Perl 5
Perl is not required, but it is used if present to test the
installation. We may decide to use it elsewhere in the future.
Update. 2000-02-25 Andreas Jaeger <aj@suse.de> * math/Versions: Move fe* function to GLIBC_2.2. The patches have not been added to glibc 2.1.3. * Versions.def: Remove 2.1.3 entry for math. * sysdeps/alpha/fpu/fclrexcpt.c: Change default version to GLIBC_2.2. * sysdeps/alpha/fpu/fegetenv.c: Likewise. * sysdeps/alpha/fpu/fesetenv.c: Likewise. * sysdeps/alpha/fpu/feupdateenv.c: Likewise. * sysdeps/alpha/fpu/fgetexcptflg.c: Likewise. * sysdeps/alpha/fpu/fraiseexcpt.c: Likewise. * sysdeps/alpha/fpu/fsetexcptflg.c: Likewise. * sysdeps/arm/fpu/fclrexcpt.c: Likewise. * sysdeps/arm/fpu/fegetenv.c: Likewise. * sysdeps/arm/fpu/fesetenv.c: Likewise. * sysdeps/arm/fpu/fraiseexcpt.c: Likewise. * sysdeps/arm/fpu/fsetexcptflg.c: Likewise. * sysdeps/generic/fclrexcpt.c: Likewise. * sysdeps/generic/fegetenv.c: Likewise. * sysdeps/generic/fesetenv.c: Likewise. * sysdeps/generic/feupdateenv.c: Likewise. * sysdeps/generic/fgetexcptflg.c: Likewise. * sysdeps/generic/fraiseexcpt.c: Likewise. * sysdeps/generic/fsetexcptflg.c: Likewise. * sysdeps/i386/fpu/fclrexcpt.c: Likewise. * sysdeps/i386/fpu/fegetenv.c: Likewise. * sysdeps/i386/fpu/fesetenv.c: Likewise. * sysdeps/i386/fpu/feupdateenv.c: Likewise. * sysdeps/i386/fpu/fgetexcptflg.c: Likewise. * sysdeps/i386/fpu/fraiseexcpt.c: Likewise. * sysdeps/i386/fpu/fsetexcptflg.c: Likewise. * sysdeps/m68k/fpu/fclrexcpt.c: Likewise. * sysdeps/m68k/fpu/fegetenv.c: Likewise. * sysdeps/m68k/fpu/fesetenv.c: Likewise. * sysdeps/m68k/fpu/feupdateenv.c: Likewise. * sysdeps/m68k/fpu/fgetexcptflg.c: Likewise. * sysdeps/m68k/fpu/fraiseexcpt.c: Likewise. * sysdeps/m68k/fpu/fsetexcptflg.c: Likewise. * sysdeps/mips/fpu/fclrexcpt.c: Likewise. * sysdeps/mips/fpu/fegetenv.c: Likewise. * sysdeps/mips/fpu/fesetenv.c: Likewise. * sysdeps/mips/fpu/feupdateenv.c: Likewise. * sysdeps/mips/fpu/fgetexcptflg.c: Likewise. * sysdeps/powerpc/fclrexcpt.c: Likewise. * sysdeps/powerpc/fpu/fegetenv.c: Likewise. * sysdeps/powerpc/fpu/fesetenv.c: Likewise. * sysdeps/powerpc/fpu/feupdateenv.c: Likewise. * sysdeps/powerpc/fpu/fgetexcptflg.c: Likewise. * sysdeps/powerpc/fpu/fraiseexcpt.c: Likewise. * sysdeps/powerpc/fpu/fsetexcptflg.c: Likewise. * sysdeps/sparc/fpu/fclrexcpt.c: Likewise. * sysdeps/sparc/fpu/fegetenv.c: Likewise. * sysdeps/sparc/fpu/fesetenv.c: Likewise. * sysdeps/sparc/fpu/feupdateenv.c: Likewise. * sysdeps/sparc/fpu/fgetexcptflg.c: Likewise. * sysdeps/sparc/fpu/fraiseexcpt.c: Likewise. * sysdeps/sparc/fpu/fsetexcptflg.c: Likewise. 2000-02-25 Andreas Jaeger <aj@suse.de> * sysdeps/alpha/fpu/fraiseexcpt.c (__feraiseexcept): Correct declaration to return value. * sysdeps/ieee754/Makefile (CFLAGS-k_standard.c): Added. * math/Makefile: Remove -Wno-write-strings since it's only needed by one file. * intl/Makefile (CFLAGS-bindtextdom.c): The code has been fixed, we don't need to disable the warnings anymore, remove them. (CFLAGS-finddomain.c): Likewise. (CFLAGS-localealias.c): Likewise. 2000-02-25 Andreas Jaeger <aj@suse.de> * configure.in: Allow sed 3.02 or newer versions. * manual/install.texi (Tools for Compilation): Document sed requirement.
2000-02-26 02:21:37 +01:00
@item
GNU @code{sed} 3.02 or newer
@code{Sed} is used in several places to generate files. Most scripts work
with any version of @code{sed}. As of release time, @code{sed} version
4.2.2 is the newest verified to work to build @theglibc{}.
Update. 2000-02-25 Andreas Jaeger <aj@suse.de> * math/Versions: Move fe* function to GLIBC_2.2. The patches have not been added to glibc 2.1.3. * Versions.def: Remove 2.1.3 entry for math. * sysdeps/alpha/fpu/fclrexcpt.c: Change default version to GLIBC_2.2. * sysdeps/alpha/fpu/fegetenv.c: Likewise. * sysdeps/alpha/fpu/fesetenv.c: Likewise. * sysdeps/alpha/fpu/feupdateenv.c: Likewise. * sysdeps/alpha/fpu/fgetexcptflg.c: Likewise. * sysdeps/alpha/fpu/fraiseexcpt.c: Likewise. * sysdeps/alpha/fpu/fsetexcptflg.c: Likewise. * sysdeps/arm/fpu/fclrexcpt.c: Likewise. * sysdeps/arm/fpu/fegetenv.c: Likewise. * sysdeps/arm/fpu/fesetenv.c: Likewise. * sysdeps/arm/fpu/fraiseexcpt.c: Likewise. * sysdeps/arm/fpu/fsetexcptflg.c: Likewise. * sysdeps/generic/fclrexcpt.c: Likewise. * sysdeps/generic/fegetenv.c: Likewise. * sysdeps/generic/fesetenv.c: Likewise. * sysdeps/generic/feupdateenv.c: Likewise. * sysdeps/generic/fgetexcptflg.c: Likewise. * sysdeps/generic/fraiseexcpt.c: Likewise. * sysdeps/generic/fsetexcptflg.c: Likewise. * sysdeps/i386/fpu/fclrexcpt.c: Likewise. * sysdeps/i386/fpu/fegetenv.c: Likewise. * sysdeps/i386/fpu/fesetenv.c: Likewise. * sysdeps/i386/fpu/feupdateenv.c: Likewise. * sysdeps/i386/fpu/fgetexcptflg.c: Likewise. * sysdeps/i386/fpu/fraiseexcpt.c: Likewise. * sysdeps/i386/fpu/fsetexcptflg.c: Likewise. * sysdeps/m68k/fpu/fclrexcpt.c: Likewise. * sysdeps/m68k/fpu/fegetenv.c: Likewise. * sysdeps/m68k/fpu/fesetenv.c: Likewise. * sysdeps/m68k/fpu/feupdateenv.c: Likewise. * sysdeps/m68k/fpu/fgetexcptflg.c: Likewise. * sysdeps/m68k/fpu/fraiseexcpt.c: Likewise. * sysdeps/m68k/fpu/fsetexcptflg.c: Likewise. * sysdeps/mips/fpu/fclrexcpt.c: Likewise. * sysdeps/mips/fpu/fegetenv.c: Likewise. * sysdeps/mips/fpu/fesetenv.c: Likewise. * sysdeps/mips/fpu/feupdateenv.c: Likewise. * sysdeps/mips/fpu/fgetexcptflg.c: Likewise. * sysdeps/powerpc/fclrexcpt.c: Likewise. * sysdeps/powerpc/fpu/fegetenv.c: Likewise. * sysdeps/powerpc/fpu/fesetenv.c: Likewise. * sysdeps/powerpc/fpu/feupdateenv.c: Likewise. * sysdeps/powerpc/fpu/fgetexcptflg.c: Likewise. * sysdeps/powerpc/fpu/fraiseexcpt.c: Likewise. * sysdeps/powerpc/fpu/fsetexcptflg.c: Likewise. * sysdeps/sparc/fpu/fclrexcpt.c: Likewise. * sysdeps/sparc/fpu/fegetenv.c: Likewise. * sysdeps/sparc/fpu/fesetenv.c: Likewise. * sysdeps/sparc/fpu/feupdateenv.c: Likewise. * sysdeps/sparc/fpu/fgetexcptflg.c: Likewise. * sysdeps/sparc/fpu/fraiseexcpt.c: Likewise. * sysdeps/sparc/fpu/fsetexcptflg.c: Likewise. 2000-02-25 Andreas Jaeger <aj@suse.de> * sysdeps/alpha/fpu/fraiseexcpt.c (__feraiseexcept): Correct declaration to return value. * sysdeps/ieee754/Makefile (CFLAGS-k_standard.c): Added. * math/Makefile: Remove -Wno-write-strings since it's only needed by one file. * intl/Makefile (CFLAGS-bindtextdom.c): The code has been fixed, we don't need to disable the warnings anymore, remove them. (CFLAGS-finddomain.c): Likewise. (CFLAGS-localealias.c): Likewise. 2000-02-25 Andreas Jaeger <aj@suse.de> * configure.in: Allow sed 3.02 or newer versions. * manual/install.texi (Tools for Compilation): Document sed requirement.
2000-02-26 02:21:37 +01:00
@end itemize
@noindent
If you change any of the @file{configure.ac} files you will also need
@itemize @bullet
@item
GNU @code{autoconf} 2.69 (exactly)
@end itemize
@noindent
and if you change any of the message translation files you will need
@itemize @bullet
@item
GNU @code{gettext} 0.10.36 or later
@end itemize
@noindent
If you wish to regenerate the @code{yacc} parser code in the @file{intl}
subdirectory you will need
@itemize @bullet
@item
GNU @code{bison} 2.7 or later
@end itemize
@noindent
You may also need these packages if you upgrade your source tree using
patches, although we try to avoid this.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@node Linux
@appendixsec Specific advice for @gnulinuxsystems{}
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@cindex kernel header files
If you are installing @theglibc{} on @gnulinuxsystems{}, you need to have
Require Linux 3.2 except on x86 / x86_64, 3.2 headers everywhere. In <https://sourceware.org/ml/libc-alpha/2016-01/msg00885.html> I proposed a minimum Linux kernel version of 3.2 for glibc 2.24, since Linux 2.6.32 has reached EOL. In the discussion in February, some concerns were expressed about compatibility with OpenVZ containers. It's not clear that these are real issues, given OpenVZ backporting kernel features and faking the kernel version for guest software, as discussed in <https://sourceware.org/ml/libc-alpha/2016-02/msg00278.html>. It's also not clear that supporting running GNU/Linux distributions from late 2016 (at the earliest) on a kernel series from 2009 is a sensible expectation. However, as an interim step, this patch increases the requirement everywhere except x86 / x86_64 (since the controversy was only about those architectures); the special caveats and settings can easily be removed later when we're ready to increase the requirements on x86 / x86_64 (and if someone would like to raise the issue on LWN as suggested in the previous discussion, that would be welcome). 3.2 kernel headers are required everywhere by this patch. (x32 already requires 3.4 or later, so is unaffected by this patch.) As usual for such a change, this patch only changes the configure scripts and associated documentation. The intent is to follow up with removal of dead __LINUX_KERNEL_VERSION conditionals. Each __ASSUME_* or other macro that becomes dead can then be removed independently. Tested for x86_64 and x86. * sysdeps/unix/sysv/linux/configure.ac (LIBC_LINUX_VERSION): Define to 3.2.0. (arch_minimum_kernel): Likewise. * sysdeps/unix/sysv/linux/configure: Regenerated. * sysdeps/unix/sysv/linux/i386/configure.ac (arch_minimum_kernel): Define to 2.6.32. * sysdeps/unix/sysv/linux/i386/configure: Regenerated. * sysdeps/unix/sysv/linux/x86_64/64/configure.ac (arch_minimum_kernel): Define to 2.6.32. * sysdeps/unix/sysv/linux/x86_64/64/configure: Regenerated. * README: Document Linux 3.2 requirement. * manual/install.texi (Linux): Document Linux 3.2 headers requirement. * INSTALL: Regenerated.
2016-02-24 18:15:12 +01:00
the header files from a 3.2 or newer kernel around for reference.
(For the ia64 architecture, you need version 3.2.18 or newer because this
is the first version with support for the @code{accept4} system call.)
These headers must be installed using @samp{make headers_install}; the
headers present in the kernel source directory are not suitable for
direct use by @theglibc{}. You do not need to use that kernel, just have
its headers installed where @theglibc{} can access them, referred to here as
@var{install-directory}. The easiest way to do this is to unpack it
in a directory such as @file{/usr/src/linux-@var{version}}. In that
directory, run @samp{make headers_install
INSTALL_HDR_PATH=@var{install-directory}}. Finally, configure @theglibc{}
with the option @samp{--with-headers=@var{install-directory}/include}.
Use the most recent kernel you can get your hands on. (If you are
cross-compiling @theglibc{}, you need to specify
@samp{ARCH=@var{architecture}} in the @samp{make headers_install}
command, where @var{architecture} is the architecture name used by the
Linux kernel, such as @samp{x86} or @samp{powerpc}.)
After installing @theglibc{}, you may need to remove or rename
directories such as @file{/usr/include/linux} and
@file{/usr/include/asm}, and replace them with copies of directories
such as @file{linux} and @file{asm} from
@file{@var{install-directory}/include}. All directories present in
@file{@var{install-directory}/include} should be copied, except that
@theglibc{} provides its own version of @file{/usr/include/scsi}; the
files provided by the kernel should be copied without replacing those
provided by @theglibc{}. The @file{linux}, @file{asm} and
@file{asm-generic} directories are required to compile programs using
@theglibc{}; the other directories describe interfaces to the kernel but
are not required if not compiling programs using those interfaces.
You do not need to copy kernel headers if you did not specify an
alternate kernel header source using @samp{--with-headers}.
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
The Filesystem Hierarchy Standard for @gnulinuxsystems{} expects some
components of the @glibcadj{} installation to be in
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
@file{/lib} and some in @file{/usr/lib}. This is handled automatically
if you configure @theglibc{} with @samp{--prefix=/usr}. If you set some other
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
prefix or allow it to default to @file{/usr/local}, then all the
components are installed there.
@node Reporting Bugs
@appendixsec Reporting Bugs
@cindex reporting bugs
@cindex bugs, reporting
There are probably bugs in @theglibc{}. There are certainly
errors and omissions in this manual. If you report them, they will get
fixed. If you don't, no one will ever know about them and they will
remain unfixed for all eternity, if not longer.
It is a good idea to verify that the problem has not already been
reported. Bugs are documented in two places: The file @file{BUGS}
describes a number of well known bugs and the central @glibcadj{}
bug tracking system has a
WWW interface at
@url{http://sourceware.org/bugzilla/}. The WWW
interface gives you access to open and closed reports. A closed report
normally includes a patch or a hint on solving the problem.
To report a bug, first you must find it. With any luck, this will be the
hard part. Once you've found a bug, make sure it's really a bug. A
good way to do this is to see if @theglibc{} behaves the same way
some other C library does. If so, probably you are wrong and the
libraries are right (but not necessarily). If not, one of the libraries
is probably wrong. It might not be @theglibc{}. Many historical
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
Unix C libraries permit things that we don't, such as closing a file
twice.
If you think you have found some way in which @theglibc{} does not
Update. 1998-11-09 18:16 Ulrich Drepper <drepper@cygnus.com> * math/complex.h: Include bits/mathdef.h to get __NO_LONG_DOUBLE_MATH is needed. Don't define long double functions if __NO_LONG_DOUBLE_MATH is defined. Don't define `complex' but instead `_Complex'. The later is the reserved keyword. * math/bits/cmathcalls.c: Define _Mdouble_complex_ using _Complex, not complex. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * manual/libc.texinfo: Remove colon from category name. * manual/Makefile (dir-add.info): Likewise. 1998-11-07 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * configure.in: Avoid autoconf bug. 1998-10-28 H.J. Lu <hjl@gnu.org> * posix/getopt.h: Add "__" to arguments in prototypes. 1998-11-05 H.J. Lu <hjl@gnu.org> * libio/iofgets.c (_IO_fgets): Don't report error if something was read in and errno is set to EAGAIN. * libio/iofgets_u.c (fgets_unlocked): Likewise. 1998-11-05 Philip Blundell <philb@gnu.org> * sysdeps/unix/sysv/linux/net/if_packet.h: Don't include kernel header; it defines too much. Provide a local definition of struct sockaddr_pkt and a comment advising against its use. 1998-11-06 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Avoid empty include list. 1998-11-04 Andreas Schwab <schwab@issan.cs.uni-dortmund.de> * extra-lib.mk: Add support for $(lib)-shared-only-routines. * elf/Makefile (libdl-routines): Add dlopenold only if doing versioning. (libdl-shared-only-routines): New variable. 1998-11-06 Paul Eggert <eggert@twinsun.com> Don't invoke localtime_r or gmtime_r unless it's the GNU C library's localtime_r and gmtime_r; there are too many buggy implementations of localtime_r and gmtime_r out there, and it's not worth keeping track of all the different bugs. * time/mktime.c (__EXTENSIONS__): Remove. (<unistd.h>): No need to include. Remove. (my_mktime_localtime_r): Renamed from localtime_r; all uses changed. Base it on localtime unless _LIBC. * time/strftime.c (my_strftime_gmtime_r): Renamed from gmtime_r; all uses changed. (my_strftime_localtime_r): Renamed from localtime_r; all uses changed. Base them on localtime/gmtime if not _LIBC.
1998-11-09 19:21:06 +01:00
conform to the ISO and POSIX standards (@pxref{Standards and
Portability}), that is definitely a bug. Report it!
Once you're sure you've found a bug, try to narrow it down to the
smallest test case that reproduces the problem. In the case of a C
library, you really only need to narrow it down to one library
function call, if possible. This should not be too difficult.
The final step when you have a simple test case is to report the bug.
Do this at @value{REPORT_BUGS_TO}.
If you are not sure how a function should behave, and this manual
doesn't tell you, that's a bug in the manual. Report that too! If the
function's behavior disagrees with the manual, then either the library
or the manual has a bug, so report the disagreement. If you find any
errors or omissions in this manual, please report them to the
bug database. If you refer to specific
sections of the manual, please include the section names for easier
identification.