diff options
Diffstat (limited to 'libstdc++-v3/acinclude.m4')
| -rw-r--r-- | libstdc++-v3/acinclude.m4 | 134 |
1 files changed, 116 insertions, 18 deletions
diff --git a/libstdc++-v3/acinclude.m4 b/libstdc++-v3/acinclude.m4 index 186916c2e47..2d046e94f04 100644 --- a/libstdc++-v3/acinclude.m4 +++ b/libstdc++-v3/acinclude.m4 @@ -2429,8 +2429,7 @@ dnl is intended to be an all-or-nothing switch, so all the atomic operations dnl that are used should be checked. dnl dnl Note: -dnl libgomp and libgfortran do this with a link test, instead of an asm test. -dnl see: CHECK_SYNC_FETCH_AND_ADD +dnl libgomp and libgfortran use a link test, see CHECK_SYNC_FETCH_AND_ADD. dnl dnl Defines: dnl _GLIBCXX_ATOMIC_BUILTINS_1 @@ -2442,12 +2441,110 @@ AC_DEFUN([GLIBCXX_ENABLE_ATOMIC_BUILTINS], [ AC_LANG_SAVE AC_LANG_CPLUSPLUS old_CXXFLAGS="$CXXFLAGS" - + + # Do link tests if possible, instead asm tests. + if test x$gcc_no_link != xyes; then + + # Can do link tests. + + CXXFLAGS="$CXXFLAGS -fno-exceptions" + + AC_MSG_CHECKING([for atomic builtins for bool]) + AC_CACHE_VAL(glibcxx_cv_atomic_bool, [ + AC_TRY_LINK( + [ ], + [typedef bool atomic_type; + atomic_type c1; + atomic_type c2; + const atomic_type c3(0); + __sync_fetch_and_add(&c1, c2); + __sync_val_compare_and_swap(&c1, c3, c2); + __sync_lock_test_and_set(&c1, c3); + __sync_lock_release(&c1); + __sync_synchronize();], + [glibcxx_cv_atomic_bool=yes], + [glibcxx_cv_atomic_bool=no]) + ]) + if test $glibcxx_cv_atomic_bool = yes; then + AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1, + [Define if builtin atomic operations for bool are supported on this host.]) + fi + AC_MSG_RESULT($glibcxx_cv_atomic_bool) + + AC_MSG_CHECKING([for atomic builtins for short]) + AC_CACHE_VAL(glibcxx_cv_atomic_short, [ + AC_TRY_LINK( + [ ], + [typedef short atomic_type; + atomic_type c1; + atomic_type c2; + const atomic_type c3(0); + __sync_fetch_and_add(&c1, c2); + __sync_val_compare_and_swap(&c1, c3, c2); + __sync_lock_test_and_set(&c1, c3); + __sync_lock_release(&c1); + __sync_synchronize();], + [glibcxx_cv_atomic_short=yes], + [glibcxx_cv_atomic_short=no]) + ]) + if test $glibcxx_cv_atomic_short = yes; then + AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1, + [Define if builtin atomic operations for short are supported on this host.]) + fi + AC_MSG_RESULT($glibcxx_cv_atomic_short) + + AC_MSG_CHECKING([for atomic builtins for int]) + AC_CACHE_VAL(glibcxx_cv_atomic_int, [ + AC_TRY_LINK( + [ ], + [typedef int atomic_type; + atomic_type c1; + atomic_type c2; + const atomic_type c3(0); + __sync_fetch_and_add(&c1, c2); + __sync_val_compare_and_swap(&c1, c3, c2); + __sync_lock_test_and_set(&c1, c3); + __sync_lock_release(&c1); + __sync_synchronize();], + [glibcxx_cv_atomic_int=yes], + [glibcxx_cv_atomic_int=no]) + ]) + if test $glibcxx_cv_atomic_int = yes; then + AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1, + [Define if builtin atomic operations for int are supported on this host.]) + fi + AC_MSG_RESULT($glibcxx_cv_atomic_int) + + AC_MSG_CHECKING([for atomic builtins for long long]) + AC_CACHE_VAL(glibcxx_cv_atomic_long_long, [ + AC_TRY_LINK( + [ ], + [typedef long long atomic_type; + atomic_type c1; + atomic_type c2; + const atomic_type c3(0); + __sync_fetch_and_add(&c1, c2); + __sync_val_compare_and_swap(&c1, c3, c2); + __sync_lock_test_and_set(&c1, c3); + __sync_lock_release(&c1); + __sync_synchronize();], + [glibcxx_cv_atomic_long_long=yes], + [glibcxx_cv_atomic_long_long=no]) + ]) + if test $glibcxx_cv_atomic_long_long = yes; then + AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1, + [Define if builtin atomic operations for long long are supported on this host.]) + fi + AC_MSG_RESULT($glibcxx_cv_atomic_long_long) + + else + + # Do asm tests. + # Compile unoptimized. CXXFLAGS='-O0 -S' - # Fake what AC_TRY_COMPILE does, without linking as this is - # unnecessary for a builtins test. + # Fake what AC_TRY_COMPILE does. cat > conftest.$ac_ext << EOF [#]line __oline__ "configure" @@ -2469,14 +2566,14 @@ EOF AC_MSG_CHECKING([for atomic builtins for bool]) if AC_TRY_EVAL(ac_compile); then if grep __sync_ conftest.s >/dev/null 2>&1 ; then - enable_atomic_builtinsb=no + glibcxx_cv_atomic_bool=no else AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_1, 1, [Define if builtin atomic operations for bool are supported on this host.]) - enable_atomic_builtinsb=yes + glibcxx_cv_atomic_bool=yes fi fi - AC_MSG_RESULT($enable_atomic_builtinsb) + AC_MSG_RESULT($glibcxx_cv_atomic_bool) rm -f conftest* cat > conftest.$ac_ext << EOF @@ -2499,14 +2596,14 @@ EOF AC_MSG_CHECKING([for atomic builtins for short]) if AC_TRY_EVAL(ac_compile); then if grep __sync_ conftest.s >/dev/null 2>&1 ; then - enable_atomic_builtinss=no + glibcxx_cv_atomic_short=no else AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_2, 1, [Define if builtin atomic operations for short are supported on this host.]) - enable_atomic_builtinss=yes + glibcxx_cv_atomic_short=yes fi fi - AC_MSG_RESULT($enable_atomic_builtinss) + AC_MSG_RESULT($glibcxx_cv_atomic_short) rm -f conftest* cat > conftest.$ac_ext << EOF @@ -2530,14 +2627,14 @@ EOF AC_MSG_CHECKING([for atomic builtins for int]) if AC_TRY_EVAL(ac_compile); then if grep __sync_ conftest.s >/dev/null 2>&1 ; then - enable_atomic_builtinsi=no + glibcxx_cv_atomic_int=no else AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_4, 1, [Define if builtin atomic operations for int are supported on this host.]) - enable_atomic_builtinsi=yes + glibcxx_cv_atomic_int=yes fi fi - AC_MSG_RESULT($enable_atomic_builtinsi) + AC_MSG_RESULT($glibcxx_cv_atomic_int) rm -f conftest* cat > conftest.$ac_ext << EOF @@ -2560,22 +2657,23 @@ EOF AC_MSG_CHECKING([for atomic builtins for long long]) if AC_TRY_EVAL(ac_compile); then if grep __sync_ conftest.s >/dev/null 2>&1 ; then - enable_atomic_builtinsll=no + glibcxx_cv_atomic_long_long=no else AC_DEFINE(_GLIBCXX_ATOMIC_BUILTINS_8, 1, [Define if builtin atomic operations for long long are supported on this host.]) - enable_atomic_builtinsll=yes + glibcxx_cv_atomic_long_long=yes fi fi - AC_MSG_RESULT($enable_atomic_builtinsll) + AC_MSG_RESULT($glibcxx_cv_atomic_long_long) rm -f conftest* + fi CXXFLAGS="$old_CXXFLAGS" AC_LANG_RESTORE # Set atomicity_dir to builtins if either of above tests pass. - if test $enable_atomic_builtinsi = yes || test $enable_atomic_builtinsb = yes ; then + if test $glibcxx_cv_atomic_int = yes || test $glibcxx_cv_atomic_bool = yes ; then atomicity_dir=cpu/generic/atomicity_builtins fi |