From d0b62698c9bc55577ca7df9351c8f9afb2b52026 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Tue, 9 Jun 2015 22:29:46 +0200
Subject: [PATCH] gnu: gcc: Build libbacktrace without -Werror.
* gnu/packages/gcc.scm (gcc-4.7)[arguments] <pre-configure>: Remove -Werror
from libbacktrace/configure.
---
gnu/packages/gcc.scm | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index e10d45d80eb..48ef72933dd 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -240,6 +240,14 @@ (define-public gcc-4.7
(("static char const sed_cmd_z\\[\\] =.*;")
"static char const sed_cmd_z[] = \"sed\";"))
+ (when (file-exists? "libbacktrace")
+ ;; GCC 4.8+ comes with libbacktrace. By default it builds
+ ;; with -Werror, which fails with a -Wcast-qual error in glibc
+ ;; 2.21's stdlib-bsearch.h. Remove -Werror.
+ (substitute* "libbacktrace/configure"
+ (("WARN_FLAGS=(.*)-Werror" _ flags)
+ (string-append "WARN_FLAGS=" flags))))
+
;; Add a RUNPATH to libstdc++.so so that it finds libgcc_s.
;; See <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=32354>
;; and <http://bugs.gnu.org/20358>.
--
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