alloca: provide <alloca.h>

STATUS

@@ -225,6 +225,9 @@ TEST:       Function/symbol/macro needs to be tested
 
 7.25 <wctype.h>                              TODO (not a priority)
 
+(EXT) <alloca.h>
+     (EXT)     alloca                        -
+
 # Supporting locales
 
 What if we wanted to support more locales?

include/alloca.h

@@ -0,0 +1,21 @@
+#ifndef __ALLOCA_H__
+# define __ALLOCA_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stddef.h>
+
+#undef alloca
+
+/* Allocate a block of memory on the stack. */
+extern void *alloca(size_t __size);
+
+#define alloca(size) __builtin_alloca(size)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*__ALLOCA_H__*/