Add --with-nonshared-cflags option to configure
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10
ChangeLog
10
ChangeLog
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@ -1,3 +1,13 @@
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2018-08-16 Florian Weimer <fweimer@redhat.com>
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* configure.ac: Add --with-nonshared-cflags option.
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* config.make.in (extra-nonshared-cflags): Set variable.
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* Makeconfig (CFLAGS-.oS): Use it.
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* manual/install.texi (Configuring and compiling): Document
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--with-nonshared-cflags.
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* configure: Regenerate.
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* INSTALL: Likewise.
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2018-08-16 Florian Weimer <fweimer@redhat.com>
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* Makeconfig (ASFLAGS): Always append required assembler flags.
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16
INSTALL
16
INSTALL
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@ -90,6 +90,22 @@ if 'CFLAGS' is specified it must enable optimization. For example:
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library will still be usable, but functionality may be lost--for
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example, you can't build a shared libc with old binutils.
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'--with-nonshared-cflags=CFLAGS'
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Use additional compiler flags CFLAGS to build the parts of the
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library which are always statically linked into applications and
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libraries even with shared linking (that is, the object files
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contained in 'lib*_nonshared.a' libraries). The build process will
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automatically use the appropriate flags, but this option can be
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used to set additional flags required for building applications and
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libraries, to match local policy. For example, if such a policy
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requires that all code linked into applications must be built with
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source fortification,
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'--with-nonshared-cflags=-Wp,-D_FORTIFY_SOURCE=2' will make sure
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that the objects in 'libc_nonshared.a' are compiled with this flag
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(although this will not affect the generated code in this
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particular case and potentially change debugging information and
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metadata only).
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'--disable-shared'
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Don't build shared libraries even if it is possible. Not all
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systems support shared libraries; you need ELF support and
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@ -1038,7 +1038,7 @@ object-suffixes-for-libc += .oS
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# Must build the routines as PIC, though, because they can end up in (users')
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# shared objects. We don't want to use CFLAGS-os because users may, for
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# example, make that processor-specific.
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CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
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CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
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CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
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libtype.oS = lib%_nonshared.a
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endif
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@ -110,6 +110,7 @@ BUILD_CC = @BUILD_CC@
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CFLAGS = @CFLAGS@
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CPPFLAGS-config = @CPPFLAGS@
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CPPUNDEFS = @CPPUNDEFS@
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extra-nonshared-cflags = @extra_nonshared_cflags@
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ASFLAGS-config = @ASFLAGS_config@
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AR = @AR@
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NM = @NM@
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@ -684,6 +684,7 @@ force_install
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bindnow
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hardcoded_path_in_tests
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enable_timezone_tools
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extra_nonshared_cflags
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use_default_link
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sysheaders
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ac_ct_CXX
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@ -762,6 +763,7 @@ with_binutils
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with_selinux
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with_headers
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with_default_link
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with_nonshared_cflags
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enable_sanity_checks
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enable_shared
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enable_profile
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@ -1482,6 +1484,8 @@ Optional Packages:
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--with-headers=PATH location of system headers to use (for example
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/usr/src/linux/include) [default=compiler default]
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--with-default-link do not use explicit linker scripts
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--with-nonshared-cflags=CFLAGS
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build nonshared libraries with additional CFLAGS
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--with-cpu=CPU select code for CPU variant
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Some influential environment variables:
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@ -3339,6 +3343,16 @@ else
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fi
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# Check whether --with-nonshared-cflags was given.
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if test "${with_nonshared_cflags+set}" = set; then :
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withval=$with_nonshared_cflags; extra_nonshared_cflags=$withval
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else
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extra_nonshared_cflags=
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fi
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# Check whether --enable-sanity-checks was given.
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if test "${enable_sanity_checks+set}" = set; then :
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enableval=$enable_sanity_checks; enable_sanity=$enableval
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@ -154,6 +154,14 @@ AC_ARG_WITH([default-link],
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[use_default_link=$withval],
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[use_default_link=default])
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dnl Additional build flags injection.
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AC_ARG_WITH([nonshared-cflags],
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AC_HELP_STRING([--with-nonshared-cflags=CFLAGS],
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[build nonshared libraries with additional CFLAGS]),
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[extra_nonshared_cflags=$withval],
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[extra_nonshared_cflags=])
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AC_SUBST(extra_nonshared_cflags)
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AC_ARG_ENABLE([sanity-checks],
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AC_HELP_STRING([--disable-sanity-checks],
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[really do not use threads (should not be used except in special situations) @<:@default=yes@:>@]),
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@ -117,6 +117,20 @@ problem and suppress these constructs, so that the library will still be
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usable, but functionality may be lost---for example, you can't build a
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shared libc with old binutils.
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@item --with-nonshared-cflags=@var{cflags}
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Use additional compiler flags @var{cflags} to build the parts of the
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library which are always statically linked into applications and
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libraries even with shared linking (that is, the object files contained
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in @file{lib*_nonshared.a} libraries). The build process will
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automatically use the appropriate flags, but this option can be used to
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set additional flags required for building applications and libraries,
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to match local policy. For example, if such a policy requires that all
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code linked into applications must be built with source fortification,
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@samp{--with-nonshared-cflags=-Wp,-D_FORTIFY_SOURCE=2} will make sure
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that the objects in @file{libc_nonshared.a} are compiled with this flag
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(although this will not affect the generated code in this particular
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case and potentially change debugging information and metadata only).
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@c disable static doesn't work currently
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@c @item --disable-static
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@c Don't build static libraries. Static libraries aren't that useful these
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