2003-01-28 18:42:28 +08:00
|
|
|
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
|
2012-03-24 00:37:31 +08:00
|
|
|
# Local configure fragment for sysdeps/s390.
|
2003-01-28 18:42:28 +08:00
|
|
|
|
|
|
|
|
dnl It is always possible to access static and hidden symbols in an
|
|
|
|
|
dnl position independent way.
|
|
|
|
|
AC_DEFINE(PI_STATIC_AND_HIDDEN)
|
2014-04-16 18:58:02 +08:00
|
|
|
|
|
|
|
|
dnl Accept as 2.24 or newer.
|
|
|
|
|
AC_CHECK_PROG_VER(AS, $AS, --version,
|
|
|
|
|
[GNU assembler.* \([0-9]*\.[0-9.]*\)],
|
|
|
|
|
[2.2[4-9]*|2.[3-9][0-9]*|[3-9].*|[1-9][0-9]*], critic_missing="$critic_missing The program AS is required in version >= 2.24 for target S390.")
|
|
|
|
|
|
2014-05-09 22:58:46 +08:00
|
|
|
|
|
|
|
|
AC_CACHE_CHECK(for __builtin_tbegin, libc_cv_gcc_builtin_tbegin, [dnl
|
|
|
|
|
cat > conftest.c <<\EOF
|
|
|
|
|
#include <htmintrin.h>
|
|
|
|
|
void testtransaction ()
|
|
|
|
|
{
|
|
|
|
|
if (__builtin_tbegin (0) == _HTM_TBEGIN_STARTED)
|
|
|
|
|
{
|
|
|
|
|
__builtin_tend ();
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
EOF
|
|
|
|
|
dnl
|
|
|
|
|
dnl test, if the tbegin instruction is used by __builtin_tbegin
|
|
|
|
|
if AC_TRY_COMMAND([${CC-cc} -mhtm -O2 -S conftest.c -o - | grep -w tbegin > /dev/null]) ;
|
|
|
|
|
then
|
|
|
|
|
libc_cv_gcc_builtin_tbegin=yes
|
|
|
|
|
else
|
|
|
|
|
libc_cv_gcc_builtin_tbegin=no
|
|
|
|
|
fi
|
|
|
|
|
rm -f conftest* ])
|
|
|
|
|
|
|
|
|
|
if test "$enable_lock_elision" = yes && test "$libc_cv_gcc_builtin_tbegin" = no ; then
|
|
|
|
|
critic_missing="$critic_missing The used GCC has no support for __builtin_tbegin, which is needed for lock-elision on target S390."
|
|
|
|
|
fi
|
|
|
|
|
|
2014-04-16 18:58:02 +08:00
|
|
|
test -n "$critic_missing" && AC_MSG_ERROR([
|
|
|
|
|
*** $critic_missing])
|
