logging_unittest: fixed undeclared identifier error (fixes #267)

[platform/upstream/glog.git] / m4 / ac_have_sync_val_compare_and_swap.m4

diff --git a/m4/ac_have_sync_val_compare_and_swap.m4 b/m4/ac_have_sync_val_compare_and_swap.m4
index 9ff59c2..88b027e 100644 (file)
--- a/m4/ac_have_sync_val_compare_and_swap.m4
+++ b/m4/ac_have_sync_val_compare_and_swap.m4
@@ -2,8 +2,8 @@ AC_DEFUN([AX_C___SYNC_VAL_COMPARE_AND_SWAP], [
   AC_MSG_CHECKING(for __sync_val_compare_and_swap)
   AC_CACHE_VAL(ac_cv___sync_val_compare_and_swap, [
     AC_TRY_LINK(
-      [int main() { int a; if (__sync_val_compare_and_swap(&a, 0, 1)) return 1; return 0; }],
       [],
+      [int a; if (__sync_val_compare_and_swap(&a, 0, 1)) return 1; return 0;],
       ac_cv___sync_val_compare_and_swap=yes,
       ac_cv___sync_val_compare_and_swap=no
     )])