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-rw-r--r--string/string.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/string/string.h b/string/string.h
index 0f995319bb..95dcba0041 100644
--- a/string/string.h
+++ b/string/string.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1991, 1992, 1993, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1991, 92, 93, 95, 96 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -91,6 +91,16 @@ extern size_t strxfrm __P ((char *__dest, __const char *__src, size_t __n));
extern char *strdup __P ((__const char *__s));
#endif
+#if defined (__USE_GNU) && defined (__GNUC__)
+/* Duplicate S, returning an identical alloca'd string. */
+#define strdupa(s) \
+({ \
+ const char *__old = (s); \
+ size_t __len = strlen (__old) + 1; \
+ memcpy (__builtin_alloca (__len), __old, __len); \
+})
+#endif
+
/* Find the first occurrence of C in S. */
extern char *strchr __P ((__const char *__s, int __c));
/* Find the last occurrence of C in S. */