Add --with-rtld-early-cflags configure option
Reviewed-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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8
INSTALL
8
INSTALL
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@ -106,6 +106,14 @@ if 'CFLAGS' is specified it must enable optimization. For example:
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particular case and potentially change debugging information and
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metadata only).
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'--with-rtld-early-cflags=CFLAGS'
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Use additional compiler flags CFLAGS to build the early startup
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code of the dynamic linker. These flags can be used to enable
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early dynamic linker diagnostics to run on CPUs which are not
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compatible with the rest of the GNU C Library, for example, due to
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compiler flags which target a later instruction set architecture
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(ISA).
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'--with-timeoutfactor=NUM'
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Specify an integer NUM to scale the timeout of test programs. This
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factor can be changed at run time using 'TIMEOUTFACTOR' environment
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6
NEWS
6
NEWS
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@ -120,6 +120,12 @@ Major new features:
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The OpenRISC ABI is 32-bit big-endian and uses 64-bit time (y2038 safe) and
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64-bit file offsets (LFS default).
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* A new configure option, --with-rtld-early-cflags, can be used to
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specify additional compiler flags for building the early startup code
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of the dynamic linker. On targets which have CPU compatibility
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checks, this can help to ensure that proper diagnostics are printed if
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the dynamic loader runs on an incompatible CPU.
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Deprecated and removed features, and other changes affecting compatibility:
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* On x86-64, the LD_PREFER_MAP_32BIT_EXEC environment variable support
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@ -110,6 +110,7 @@ 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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rtld-early-cflags = @rtld_early_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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@ -681,6 +681,7 @@ 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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rtld_early_cflags
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extra_nonshared_cflags
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use_default_link
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sysheaders
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@ -761,6 +762,7 @@ 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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with_rtld_early_cflags
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with_timeoutfactor
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enable_sanity_checks
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enable_shared
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@ -1480,6 +1482,8 @@ Optional Packages:
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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-rtld-early-cflags=CFLAGS
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build early initialization with additional CFLAGS
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--with-timeoutfactor=NUM
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specify an integer to scale the timeout
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--with-cpu=CPU select code for CPU variant
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@ -3386,6 +3390,15 @@ fi
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# Check whether --with-rtld-early-cflags was given.
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if test "${with_rtld_early_cflags+set}" = set; then :
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withval=$with_rtld_early_cflags; rtld_early_cflags=$withval
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else
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rtld_early_cflags=
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fi
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# Check whether --with-timeoutfactor was given.
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if test "${with_timeoutfactor+set}" = set; then :
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@ -162,6 +162,12 @@ AC_ARG_WITH([nonshared-cflags],
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[extra_nonshared_cflags=$withval],
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[extra_nonshared_cflags=])
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AC_SUBST(extra_nonshared_cflags)
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AC_ARG_WITH([rtld-early-cflags],
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AS_HELP_STRING([--with-rtld-early-cflags=CFLAGS],
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[build early initialization with additional CFLAGS]),
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[rtld_early_cflags=$withval],
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[rtld_early_cflags=])
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AC_SUBST(rtld_early_cflags)
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AC_ARG_WITH([timeoutfactor],
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AS_HELP_STRING([--with-timeoutfactor=NUM],
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@ -167,6 +167,14 @@ CFLAGS-.o += $(call elide-stack-protector,.o,$(elide-routines.os))
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CFLAGS-.op += $(call elide-stack-protector,.op,$(elide-routines.os))
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CFLAGS-.os += $(call elide-stack-protector,.os,$(all-rtld-routines))
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# Add the requested compiler flags to the early startup code.
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CFLAGS-dl-printf.os += $(rtld-early-cflags)
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CFLAGS-dl-sysdep.os += $(rtld-early-cflags)
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CFLAGS-dl-tunables.os += $(rtld-early-cflags)
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CFLAGS-dl-write.os += $(rtld-early-cflags)
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CFLAGS-dl-writev.os += $(rtld-early-cflags)
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CFLAGS-rtld.os += $(rtld-early-cflags)
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ifeq ($(unwind-find-fde),yes)
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routines += unwind-dw2-fde-glibc
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shared-only-routines += unwind-dw2-fde-glibc
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@ -131,6 +131,13 @@ 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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@item --with-rtld-early-cflags=@var{cflags}
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Use additional compiler flags @var{cflags} to build the early startup
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code of the dynamic linker. These flags can be used to enable early
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dynamic linker diagnostics to run on CPUs which are not compatible with
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the rest of @theglibc{}, for example, due to compiler flags which target
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a later instruction set architecture (ISA).
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@item --with-timeoutfactor=@var{NUM}
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Specify an integer @var{NUM} to scale the timeout of test programs.
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This factor can be changed at run time using @env{TIMEOUTFACTOR}
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