Merge 'staging' into closure-size

- there were many easy merge conflicts
- cc-wrapper needed nontrivial changes

Many other problems might've been created by interaction of the branches,
but stdenv and a few other packages build fine now.

pkgs/tools/text/gawk/default.nix

@@ -4,16 +4,19 @@ let
   inherit (stdenv.lib) optional;
 in
 stdenv.mkDerivation rec {
-  name = "gawk-4.1.0";
+  name = "gawk-4.1.1";
 
   src = fetchurl {
     url = "mirror://gnu/gawk/${name}.tar.xz";
-    sha256 = "0hin2hswbbd6kd6i4zzvgciwpl5fba8d2s524z8y5qagyz3x010q";
+    sha256 = "1nz83vpss8xv7m475sv4qhhj40g74nvcw0y9kwq9ds8wzfmcdm7g";
   };
 
   # When we do build separate interactive version, it makes sense to always include docs.
   outputs = stdenv.lib.optionals (!interactive) [ "out" "doc" ]; #ToDo
 
+  # Currently broken due to locale tests failing
+  #doCheck = !stdenv.isCygwin; # XXX: `test-dup2' segfaults on Cygwin 6.1
+
   buildInputs = [ xz.bin libsigsegv ]
     ++ optional interactive readline;
 
@@ -44,6 +47,6 @@ stdenv.mkDerivation rec {
 
     license = stdenv.lib.licenses.gpl3Plus;
 
-    maintainers = [ stdenv.lib.maintainers.ludo ];
+    maintainers = [ ];
   };
 }