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elf/Makefile: Run IFUNC tests if binutils supports IFUNC

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We should run IFUNC tests with --disable-multi-arch if the toolchain
supports IFUNCs.  For correctness, --disable-multi-arch must not
remove IFUNC support from the loader.

Tested on x86-64, x32 and i686 with and without --disable-multi-arch.

	* configure.ac (have-ifunc): New LIBC_CONFIG_VAR.
	* configure: Regenerated.
	* elf/Makefile: Run IFUNC tests if binutils supports IFUNC.

Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
This commit is contained in:
H.J. Lu 2019-02-27 13:21:46 -08:00
parent 6bd4d02ee9
commit 92ad88fe72
4 changed files with 10 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2019-02-27 H.J. Lu <hongjiu.lu@intel.com>
* configure.ac (have-ifunc): New LIBC_CONFIG_VAR.
* configure: Regenerated.
* elf/Makefile: Run IFUNC tests if binutils supports IFUNC.
2019-02-27 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* sysdeps/powerpc/powerpc32/power4/multiarch/wcscpy.c: Define ifunc

2
configure vendored
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@ -6794,6 +6794,8 @@ if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
$as_echo "#define HAVE_IFUNC 1" >>confdefs.h
fi
config_vars="$config_vars
have-ifunc = $libc_cv_ld_gnu_indirect_function"
if test x"$libc_cv_gcc_indirect_function" = xyes; then
$as_echo "#define HAVE_GCC_IFUNC 1" >>confdefs.h

1
configure.ac
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@ -1804,6 +1804,7 @@ AC_SUBST(libc_cv_gcc_unwind_find_fde)
if test x"$libc_cv_ld_gnu_indirect_function" = xyes; then
AC_DEFINE(HAVE_IFUNC)
fi
LIBC_CONFIG_VAR([have-ifunc], [$libc_cv_ld_gnu_indirect_function])
if test x"$libc_cv_gcc_indirect_function" = xyes; then
AC_DEFINE(HAVE_GCC_IFUNC)

2
elf/Makefile
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@ -321,7 +321,7 @@ modules-names-nobuild := filtmod1
tests += $(tests-static)
ifneq (no,$(multi-arch))
ifeq (yes,$(have-ifunc))
tests-ifuncstatic := ifuncmain1static ifuncmain1picstatic \
ifuncmain2static ifuncmain2picstatic \
ifuncmain4static ifuncmain4picstatic \