2 files changed, 5 insertions, 1 deletions
diff --git a/include/alloca.h b/include/alloca.h
index f61b817a..d2e6f1c6 100644
--- a/include/alloca.h
+++ b/include/alloca.h
@@ -10,6 +10,10 @@ extern "C" {
 
 void *alloca(size_t);
 
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/stdlib.h b/include/stdlib.h
index 9c8a1182..ed512f43 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -128,7 +128,7 @@ void lcong48 (unsigned short [7]);
 #endif
 
 #if defined(_GNU_SOURCE)
-void *alloca(size_t);
+#include <alloca.h>
 char *mktemp (char *);
 void *valloc (size_t);
 void *memalign(size_t, size_t);