[__GLIBC__ >= 2]: Don't declare __getpagesize.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/gmalloc.c b/src/gmalloc.c
index 7e7a8939238..ac51e2509fc 100644
--- a/src/gmalloc.c
+++ b/src/gmalloc.c
@@ -1612,7 +1612,11 @@ Cambridge, MA 02139, USA.
 #if defined (__GNU_LIBRARY__) || defined (_LIBC)
 #include <stddef.h>
 #include <sys/cdefs.h>
+#if defined (__GLIBC__) && __GLIBC__ >= 2
+/* __getpagesize is already declared in <unistd.h> with return type int */
+#else
 extern size_t __getpagesize __P ((void));
+#endif
 #else
 #include "getpagesize.h"
 #define  __getpagesize()        getpagesize()