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check whether exists __sync_{sub, add}_and_fetch

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nori0428 2013-03-01 11:08:37 +09:00
parent f290814f64
commit 764bfdcb9f
1 changed files with 1 additions and 1 deletions
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2
configure.in
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@ -47,7 +47,7 @@ AC_CACHE_CHECK([for __sync_* atomic operations], msgpack_cv_atomic_ops, [
AC_TRY_LINK([
int atomic_sub(int i) { return __sync_sub_and_fetch(&i, 1); }
int atomic_add(int i) { return __sync_add_and_fetch(&i, 1); }
], [], msgpack_cv_atomic_ops="yes")
], [atomic_sub(1); atomic_add(1);], msgpack_cv_atomic_ops="yes")
])
if test "$msgpack_cv_atomic_ops" != "yes"; then
if test "$enable_cxx" = "no"; then