Include relevant bit of ansidecl.h directly

Avoids build-dependency on binutils-dev


git-svn-id: http://www.varnish-cache.org/svn/trunk@3430 d4fa192b-c00b-0410-8231-f00ffab90ce4

lib/libjemalloc/jemalloc_linux.c

@@ -197,10 +197,20 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <pthread.h>
-#include <ansidecl.h>
 
 #include "rb.h"
 
+/* Prevent -Werror to complain about unused parameters when compiling
+   with non-ancient GCC.  Added directly here instead of grabbed from
+   ansidecl.h to save a build dependency on binutils-dev */
+#if __GNUC__ >= 3
+#ifndef ATTRIBUTE_UNUSED
+#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+#endif /* ATTRIBUTE_UNUSED */
+#else
+#define ATTRIBUTE_UNUSED
+#endif
+
 #ifdef MALLOC_DEBUG
    /* Disable inlining to make debugging easier. */
 #  define inline