glib: Fix compilation on Darwin and use default gcc

http://hydra.nixos.org/build/12458779

pkgs/development/libraries/glib/darwin-compilation.patch

@@ -0,0 +1,24 @@
+Fix compilation on Mac OS X with gcc 4.8.
+
+diff -ru glib-2.40.0-orig/gio/gdummyfile.c glib-2.40.0/gio/gdummyfile.c
+--- glib-2.40.0-orig/gio/gdummyfile.c   2014-02-03 18:40:41.000000000 +0100
++++ glib-2.40.0/gio/gdummyfile.c        2014-07-15 10:58:31.000000000 +0200
+@@ -454,7 +454,8 @@
+   result = g_malloc (escaped_string_end - escaped_string + 1);
+        
+   out = result;
+-  for (in = escaped_string; in < escaped_string_end; in++) 
++  in = escaped_string;
++  for (; in < escaped_string_end; in++) 
+     {
+       character = *in;
+       if (*in == '%') 
+@@ -551,6 +552,7 @@
+   
+   decoded->scheme = g_malloc (p - uri);
+   out = decoded->scheme;
+-  for (in = uri; in < p - 1; in++)
++  in = uri;
++  for (; in < p - 1; in++)
+     *out++ = g_ascii_tolower (*in);
+   *out = 0;

pkgs/development/libraries/glib/default.nix

@@ -49,6 +49,8 @@ stdenv.mkDerivation rec {
     sha256 = "1d98mbqjmc34s8095lkw1j1bwvnnkw9581yfvjaikjvfjsaz29qd";
   };
 
+  patches = optional stdenv.isDarwin ./darwin-compilation.patch;
+
   setupHook = ./setup-hook.sh;
 
   buildInputs = [ libelf ]
@@ -67,6 +69,11 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = optionalString stdenv.isDarwin " -lintl"
     + optionalString stdenv.isSunOS " -DBSD_COMP";
 
+  preBuild = optionalString stdenv.isDarwin
+    ''
+      export MACOSX_DEPLOYMENT_TARGET=
+    '';
+
   enableParallelBuilding = true;
 
   inherit doCheck;

pkgs/top-level/all-packages.nix

@@ -4800,11 +4800,7 @@ let
       gtkmm;
   };
 
-  glib = callPackage ../development/libraries/glib {
+  glib = callPackage ../development/libraries/glib { };
-    stdenv = if stdenv.isDarwin
-      then overrideGCC stdenv gccApple
-      else stdenv;
-  };
   glib-tested = glib.override { doCheck = true; }; # checked version separate to break cycles
   glibmm = callPackage ../development/libraries/glibmm { };