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Diffstat (limited to 'configure.in')
| -rw-r--r-- | configure.in | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/configure.in b/configure.in index 3f195a65117..9cad43620cc 100644 --- a/configure.in +++ b/configure.in @@ -1454,6 +1454,17 @@ fi AC_CHECK_FUNCS([strtoll strtoq], [break]) AC_CHECK_FUNCS([strtoull strtouq], [break]) +AC_CACHE_CHECK([for builtin locking functions], pgac_cv_gcc_int_atomics, +[AC_TRY_LINK([], + [int lock = 0; + __sync_lock_test_and_set(&lock, 1); + __sync_lock_release(&lock);], + [pgac_cv_gcc_int_atomics="yes"], + [pgac_cv_gcc_int_atomics="no"])]) +if test x"$pgac_cv_gcc_int_atomics" = x"yes"; then + AC_DEFINE(HAVE_GCC_INT_ATOMICS, 1, [Define to 1 if you have __sync_lock_test_and_set(int *) and friends.]) +fi + # # Pthreads |