From 21e583def33ecf9e9bae3a18df875cd3380e14ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ludovic=20Court=C3=A8s?= <ludo@gnu.org>
Date: Thu, 23 Apr 2015 00:03:34 +0200
Subject: [PATCH] gnu: gcc: Add a RUNPATH to libstdc++.so so that it finds
 libgcc_s.so.
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Fixes <http://bugs.gnu.org/20358>.
Reported by 宋文武 <iyzsong@gmail.com>.

* gnu/packages/gcc.scm (gcc-4.7)[arguments]: Add 'substitute*' form for
  "libstdc++-v3/src/Makefile.in".
---
 gnu/packages/gcc.scm | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
index cd6fc3b2fd..442ea9874e 100644
--- a/gnu/packages/gcc.scm
+++ b/gnu/packages/gcc.scm
@@ -252,6 +252,13 @@ where the OS part is overloaded to denote a specific ABI---into GCC
                 (("static char const sed_cmd_z\\[\\] =.*;")
                  "static char const sed_cmd_z[] = \"sed\";"))
 
+              ;; 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>.
+              (substitute* "libstdc++-v3/src/Makefile.in"
+                (("^OPT_LDFLAGS = ")
+                 "OPT_LDFLAGS = -Wl,-rpath=$(libdir) "))
+
               ;; Move libstdc++*-gdb.py to the "lib" output to avoid a
               ;; circularity between "out" and "lib".  (Note:
               ;; --with-python-dir is useless because it imposes $(prefix) as