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-rw-r--r--configure.ac5
1 files changed, 4 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 0b2a429e02..ffd05ae4f8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -332,7 +332,10 @@ if test x$use_glibc_compat != xno; then
#__fdelt_chk's params and return type have changed from long unsigned int to long int.
# See which one is present here.
AC_MSG_CHECKING(__fdelt_chk type)
- AC_TRY_COMPILE([#define __USE_FORTIFY_LEVEL 2
+ AC_TRY_COMPILE([#ifdef _FORTIFY_SOURCE
+ #undef _FORTIFY_SOURCE
+ #endif
+ #define _FORTIFY_SOURCE 2
#include <sys/select.h>
extern "C" long unsigned int __fdelt_warn(long unsigned int);],[],
[ fdelt_type="long unsigned int"],