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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/i386.
AC_CACHE_CHECK([if gcc provides <cpuid.h>], libc_cv_gcc_cpuid, [dnl
AC_COMPILE_IFELSE([#include <cpuid.h>], libc_cv_gcc_cpuid=yes,
libc_cv_gcc_cpuid=no)])
if test $libc_cv_gcc_cpuid != yes; then
AC_MSG_ERROR([gcc must provide the <cpuid.h> header])
fi
AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
libc_cv_cpp_asm_debuginfo, [dnl
cat > conftest.S <<EOF
#include "confdefs.h"
/* comment on
two lines */
${libc_cv_dot_text}
${libc_cv_asm_global_directive} foo
foo:
/* Unfortunately this test only works for a real instruction,
not for any of the machine-independent pseudo-ops.
So we just have to assume everybody has a "nop". */
nop
/* comment */
nop
/* comment */
nop
EOF
if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) && {
ac_pattern='conftest\.S'
AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
grep $ac_pattern 1>&AS_MESSAGE_LOG_FD])
}; then
libc_cv_cpp_asm_debuginfo=yes
else
libc_cv_cpp_asm_debuginfo=no
fi
rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
if test $libc_cv_cpp_asm_debuginfo = yes; then
AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
fi
dnl Check if -msse4 works.
AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
if AC_TRY_COMMAND([${CC-cc} -msse4 -xc /dev/null -S -o /dev/null]); then
libc_cv_cc_sse4=yes
else
libc_cv_cc_sse4=no
fi])
if test $libc_cv_cc_sse4 = yes; then
AC_DEFINE(HAVE_SSE4_SUPPORT)
fi
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