From 4b4dfea25d660a8a27e95ea531686001246b3d1e Mon Sep 17 00:00:00 2001
From: sin
Date: Wed, 11 Mar 2015 09:17:56 +0000
Subject: Fix invalid conversion in C++ code

/usr/include/fortify/string.h: In function 'void* __fortify_memcpy(void*, const void*, size_t)':
/usr/include/fortify/string.h:13:12: error: invalid conversion from 'void*' to 'char*' [-fpermissive]
/usr/include/fortify/string.h:14:18: error: invalid conversion from 'const void*' to 'const char*' [-fpermissive]

Since we are relying on GCC anyway, assume void * arithmetic is OK.
---
 include/string.h | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

(limited to 'include')

diff --git a/include/string.h b/include/string.h
index 6771b1d..86c258d 100644
--- a/include/string.h
+++ b/include/string.h
@@ -10,13 +10,11 @@ void *
 __fortify_memcpy(void *dest, const void *src, size_t n)
 {
 	size_t bos = __builtin_object_size(dest, 0);
-	char *d = dest;
-	const char *s = src;
 
 	/* trap if pointers are overlapping but not if dest == src.
 	 * gcc seems to like to generate code that relies on dest == src */
-	if ((d < s && d + n > s) ||
-	    (s < d && s + n > d))
+	if ((dest < src && dest + n > src) ||
+	    (src < dest && src + n > dest))
 		__builtin_trap();
 	if (n > bos)
 		__builtin_trap();
-- 
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