[patch] Fall back on mempcpy if __mempcpy is not available

0001-libelf-elf_begin.c-fall-back-on-mempcpy-if-no-__memp.patch (text/plain), 1.37 KB, created by Anthony Basile on 2013-06-09 01:27:39 UTC

From 72cfbe5bbedfa00c94050221e09b49fd27268f75 Mon Sep 17 00:00:00 2001
From: "Anthony G. Basile" <[e-mail]>
Date: Sat, 8 Jun 2013 18:43:11 -0400
Subject: [PATCH 1/6] libelf/elf_begin.c: fall back on mempcpy if no __mempcpy
 is avialable

uClibc and possibly other standard C libraries provide mempcpy but not
__mempcpy.  We check to see if __mempcpy is avialable, and if it is
not, we fall back on mempcpy.

Signed-off-by: Anthony G. Basile <[e-mail]>
---
 configure.ac       |    3 +++
 libelf/elf_begin.c |    5 +++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index d7c75ce..2a6b858 100644
--- a/configure.ac
+++ b/configure.ac
@@ -233,6 +233,9 @@ AC_CHECK_LIB([stdc++], [__cxa_demangle], [dnl
 AC_DEFINE([USE_DEMANGLE], [1], [Defined if demangling is enabled])])
 AM_CONDITIONAL(DEMANGLE, test "$ac_cv_lib_stdcpp___cxa_demangle" = yes)
 
+dnl Check for __mempcpy
+AC_CHECK_FUNCS_ONCE([__mempcpy])
+
 dnl The directories with content.
 
 dnl Documentation.
diff --git a/libelf/elf_begin.c b/libelf/elf_begin.c
index b9d5cea..32594ba 100644
--- a/libelf/elf_begin.c
+++ b/libelf/elf_begin.c
@@ -31,6 +31,11 @@
 # include <config.h>
 #endif
 
+/* If we don't have __mempcpy fall back on mempcpy */
+#ifndef HAVE___MEMPCPY
+# define __mempcpy mempcpy
+#endif
+
 #include <assert.h>
 #include <ctype.h>
 #include <errno.h>
-- 
1.7.8.6