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Use AC_LINK_IFELSE instead of _COMPILE_IFELSE for cpuid detection

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This apparently works around a bug on OpenSuSE on ARM and PPC when
LTO is enabled.

Still, as documented, LTO shouldn't be used when compiling the library.
This commit is contained in:
Frank Denis 2019-08-16 12:28:42 +02:00
parent a179b25eb0
commit 4b448b5095
2 changed files with 4 additions and 3 deletions
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5
configure vendored
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@ -18568,7 +18568,7 @@ __asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
if ac_fn_c_try_link "$LINENO"; then :
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
$as_echo "yes" >&6; }
@ -18579,7 +18579,8 @@ else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi

2
configure.ac
View File

@ -694,7 +694,7 @@ AC_SUBST(HAVE_TI_MODE_V)
HAVE_CPUID_V=0
AS_IF([test "$enable_asm" != "no"],[
AC_MSG_CHECKING(for cpuid instruction)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ ]], [[
AC_LINK_IFELSE([AC_LANG_PROGRAM([[ ]], [[
unsigned int cpu_info[4];
__asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
"=a" (cpu_info[0]), "=&r" (cpu_info[1]),