Add normal alloca() definition and implement a strdupa and friends

Change-Id: I21c9c21fd664fb11bc8496ace4a389f535a030d6

1 files changed, 5 insertions, 0 deletions

diff --git a/firmware/libc/include/stdlib.h b/firmware/libc/include/stdlib.h
index 57553367c4..e24d6a579f 100644
--- a/firmware/libc/include/stdlib.h
+++ b/firmware/libc/include/stdlib.h
@@ -31,6 +31,11 @@ void free(void *);
 void *realloc(void *, size_t);
 int  atexit(void (*)(void));
 
+#ifdef  __GNUC__
+# undef  alloca
+# define alloca(size)   __builtin_alloca (size)
+#endif /* GCC.  */
+
 #define RAND_MAX INT_MAX
 
 void srand(unsigned int seed);