diff options
| author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-10-26 00:13:37 +0000 |
|---|---|---|
| committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-10-26 00:13:37 +0000 |
| commit | 7b410abfb8e976a78f7f9a7139ad5140a67b41ad (patch) | |
| tree | 319290b23bda60cea9c3bc319a86ee3d1aa3c8fa /configure.in | |
| parent | 3ea90fc38e6fa8c4f60539dba2185270dd45c792 (diff) | |
* configure.in (rb_cv_gcc_atomic_builtins): check for atomic
builtins, all are not available in Apple derivative gcc.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29593 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 073da9355b..5dc59396a2 100644 --- a/configure.in +++ b/configure.in @@ -775,6 +775,19 @@ if test "$GCC" = yes; then AC_DEFINE_UNQUOTED([RUBY_ALIAS_FUNCTION_VOID(prot, name, args)], [RUBY_ALIAS_FUNCTION_TYPE(void, prot, name, args)]) fi + AC_CACHE_CHECK([for atomic builtins], [rb_cv_gcc_atomic_builtins], [ + AC_TRY_LINK([unsigned char atomic_var;], + [ + __sync_lock_test_and_set(&atomic_var, 0); + __sync_lock_test_and_set(&atomic_var, 1); + __sync_fetch_and_add(&atomic_var, 1); + __sync_fetch_and_sub(&atomic_var, 1); + ], + [rb_cv_gcc_atomic_builtins=yes], + [rb_cv_gcc_atomic_builtins=no])]) + if test "$rb_cv_gcc_atomic_builtins" = yes; then + AC_DEFINE(HAVE_GCC_ATOMIC_BUILTINS) + fi fi AC_CACHE_CHECK(for exported function attribute, rb_cv_func_exported, [ |