remove all references to `stdenv.cc.cc.is{GNU,Clang}`

use the new `stdenv.cc.is{GNU,Clang}` instead, which will always be
defined.

pkgs/applications/graphics/inkscape/default.nix

@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
     patchShebangs share/extensions
   ''
   # Clang gets misdetected, so hardcode the right answer
-  + stdenv.lib.optionalString (stdenv.cc.cc.isClang or false) ''
+  + stdenv.lib.optionalString stdenv.cc.isClang ''
     substituteInPlace src/ui/tool/node.h \
       --replace "#if __cplusplus >= 201103L" "#if true"
   '';

pkgs/applications/networking/browsers/opera/default.nix

@@ -6,7 +6,7 @@
 , kdeSupport ? false, qt4, kdelibs
 }:
 
-assert stdenv.isLinux && stdenv.cc.cc.isGNU or false && stdenv.cc.libc != null;
+assert stdenv.isLinux && stdenv.cc.isGNU && stdenv.cc.libc != null;
 
 let
   mirror = http://get.geo.opera.com/pub/opera;

pkgs/development/compilers/gcl/default.nix

@@ -10,7 +10,7 @@ in
 
 (
 assert a.stdenv ? cc ;
-assert a.stdenv.cc.cc.isGNU or false ;
+assert a.stdenv.cc.isGNU ;
 assert a.stdenv.cc ? libc ;
 assert a.stdenv.cc.libc != null ;
 

pkgs/development/compilers/llvm/3.5/clang.nix

@@ -1,6 +1,6 @@
 { stdenv, fetch, cmake, libxml2, libedit, llvm, version, clang-tools-extra_src }:
 let
-  gcc = if stdenv.cc.cc.isGNU or false then stdenv.cc.cc else stdenv.cc.cc.gcc;
+  gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
 in stdenv.mkDerivation {
   name = "clang-${version}";
 

pkgs/development/compilers/llvm/3.6/clang/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetch, cmake, libxml2, libedit, llvm, version, clang-tools-extra_src }:
 
 let
-  gcc = if stdenv.cc.cc.isGNU or false then stdenv.cc.cc else stdenv.cc.cc.gcc;
+  gcc = if stdenv.cc.isGNU then stdenv.cc.cc else stdenv.cc.cc.gcc;
 in stdenv.mkDerivation {
   name = "clang-${version}";
 

pkgs/development/guile-modules/guile-lib/default.nix

@@ -1,6 +1,6 @@
 {stdenv, fetchurl, guile, texinfo}:
 
-assert stdenv ? cc && stdenv.cc.cc.isGNU or false;
+assert stdenv ? cc && stdenv.cc.isGNU;
 
 stdenv.mkDerivation rec {
   name = "guile-lib-0.2.2";

pkgs/development/libraries/ffmpeg/generic.nix

@@ -129,7 +129,7 @@ stdenv.mkDerivation rec {
       "--disable-stripping"
     # Disable mmx support for 0.6.90
       (verFix null "0.6.90" "--disable-mmx")
-  ] ++ optional (stdenv.cc.cc.isClang or false) "--cc=clang";
+  ] ++ optional stdenv.cc.isClang "--cc=clang";
 
   nativeBuildInputs = [ perl pkgconfig texinfo yasm ];
 

pkgs/development/libraries/fftw/default.nix

@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     ++ optional (precision != "double") "--enable-${precision}"
     # all x86_64 have sse2
     ++ optional stdenv.isx86_64 "--enable-sse2"
-    ++ optional (stdenv.cc.cc.isGNU or false) "--enable-openmp";
+    ++ optional stdenv.cc.isGNU "--enable-openmp";
 
   enableParallelBuilding = true;
 

pkgs/development/libraries/gamin/default.nix

@@ -18,7 +18,7 @@ stdenv.mkDerivation (rec {
 
   patches = [ ./deadlock.patch ]
     ++ map fetchurl (import ./debian-patches.nix)
-    ++ stdenv.lib.optional (stdenv.cc.cc.isClang or false) ./returnval.patch;
+    ++ stdenv.lib.optional stdenv.cc.isClang ./returnval.patch;
 
 
   meta = with stdenv.lib; {

pkgs/development/libraries/glib/default.nix

@@ -7,7 +7,7 @@
 
 with stdenv.lib;
 
-assert !stdenv.isDarwin -> stdenv.cc.cc.isGNU or false;
+assert !stdenv.isDarwin -> stdenv.cc.isGNU;
 
 # TODO:
 # * Add gio-module-fam

pkgs/development/libraries/glibc/default.nix

@@ -8,7 +8,7 @@
 , withGd ? false, gd ? null, libpng ? null
 }:
 
-assert stdenv.cc.cc.isGNU or false;
+assert stdenv.cc.isGNU;
 
 let
   build = import ./common.nix;

pkgs/development/libraries/gsm/default.nix

@@ -37,7 +37,7 @@ stdenv.mkDerivation rec {
   makeFlags = [
     "SHELL=${stdenv.shell}"
     "INSTALL_ROOT=$(out)"
-  ] ++ optional (stdenv.cc.cc.isClang or false) "CC=clang";
+  ] ++ optional stdenv.cc.isClang "CC=clang";
 
   preInstall = "mkdir -p $out/{bin,lib,man/man1,man/man3,include/gsm}";
 

pkgs/development/libraries/jbigkit/default.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     sed -i 's/^\(CFLAGS.*\)$/\1 -fPIC/' Makefile
-  '' + stdenv.lib.optionalString (stdenv.cc.cc.isClang or false) ''
+  '' + stdenv.lib.optionalString stdenv.cc.isClang ''
     substituteInPlace Makefile libjbig/Makefile pbmtools/Makefile \
       --replace "CC = gcc" "CC = clang"
   '';

pkgs/development/libraries/judy/default.nix

@@ -10,7 +10,7 @@ stdenv.mkDerivation {
 
   # gcc 4.8 optimisations break judy.
   # http://sourceforge.net/p/judy/mailman/message/31995144/
-  preConfigure = stdenv.lib.optionalString (stdenv.cc.cc.isGNU or false) ''
+  preConfigure = stdenv.lib.optionalString stdenv.cc.isGNU ''
     configureFlagsArray+=("CFLAGS=-fno-strict-aliasing -fno-aggressive-loop-optimizations")
   '';
 

pkgs/development/libraries/libcdr/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig ];
 
-  configureFlags = if (stdenv.cc.cc.isClang or false)
+  configureFlags = if stdenv.cc.isClang
     then [ "--disable-werror" ] else null;
 
   CXXFLAGS="--std=gnu++0x"; # For c++11 constants in lcms2.h

pkgs/development/libraries/libfpx/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   NIX_CFLAGS_COMPILE = if stdenv.isDarwin then "-D__unix" else null;
 
   # This dead code causes a duplicate symbol error in Clang so just remove it
-  postPatch = if (stdenv.cc.cc.isClang or false) then ''
+  postPatch = if stdenv.cc.isClang then ''
     substituteInPlace jpeg/ejpeg.h --replace "int No_JPEG_Header_Flag" ""
   '' else null;
 

pkgs/development/libraries/libmad/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
   # optimize.diff is taken from https://projects.archlinux.org/svntogit/packages.git/tree/trunk/optimize.diff?h=packages/libmad
   # It is included here in order to fix a build failure in Clang
   # But it may be useful to fix other, currently unknown problems as well
-  ++ stdenv.lib.optional (stdenv.cc.cc.isClang or false) [ ./optimize.diff ];
+  ++ stdenv.lib.optional stdenv.cc.isClang [ ./optimize.diff ];
 
   nativeBuildInputs = [ autoconf ];
 

pkgs/development/libraries/librevenge/default.nix

@@ -23,7 +23,7 @@ stdenv.mkDerivation {
   # Clang generates warnings in Boost's header files
   # -Werror causes these warnings to be interpreted as errors
   # Simplest solution: disable -Werror
-  configureFlags = if (stdenv.cc.cc.isClang or false)
+  configureFlags = if stdenv.cc.isClang
     then [ "--disable-werror" ] else null;
 
   meta = {

pkgs/development/libraries/libsodium/default.nix

@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "120jkda2q58p0n68banh64vsfm3hgqnacagj425d218cr4ycdkyb";
   };
 
-  NIX_LDFLAGS = stdenv.lib.optionalString (stdenv.cc.cc.isGNU or false) "-lssp";
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.cc.isGNU "-lssp";
 
   doCheck = true;
 

pkgs/development/libraries/pixman/default.nix

@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
 
   postInstall = glib.flattenInclude;
 
-  patches = stdenv.lib.optional (stdenv.cc.cc.isClang or false) ./fix-clang36.patch;
+  patches = stdenv.lib.optional stdenv.cc.isClang ./fix-clang36.patch;
 
   meta = {
     homepage = http://pixman.org;

pkgs/development/tools/misc/astyle/default.nix

@@ -12,7 +12,7 @@ stdenv.mkDerivation {
     sha256 = "1b0f4wm1qmgcswmixv9mwbp86hbdqxk754hml8cjv5vajvqwdpzv";
   };
 
-  sourceRoot = if (stdenv.cc.cc.isClang or false)
+  sourceRoot = if stdenv.cc.isClang
     then "astyle/build/clang"
     else "astyle/build/gcc";
 

pkgs/servers/x11/xorg/overrides.nix

@@ -80,7 +80,7 @@ in
   };
 
   libxkbfile = attrs: attrs // {
-    patches = lib.optional (stdenv.cc.cc.isClang or false) ./libxkbfile-clang36.patch;
+    patches = lib.optional stdenv.cc.isClang ./libxkbfile-clang36.patch;
   };
 
   libpciaccess = attrs : attrs // {

pkgs/tools/networking/atftp/default.nix

@@ -1,6 +1,6 @@
 { lib, stdenv, fetchurl, readline, tcp_wrappers, pcre, makeWrapper }:
 assert stdenv.isLinux;
-assert stdenv.cc.cc.isGNU or false;
+assert stdenv.cc.isGNU;
 let
 version = "0.7";
 debianPatch = fetchurl {

pkgs/tools/security/tor/default.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
   # ./configure time check for any of this.
   buildInputs = [ libevent openssl zlib torsocks ];
 
-  CFLAGS = stdenv.lib.optionalString (stdenv.cc.cc.isGNU or false) "-lgcc_s";
+  CFLAGS = stdenv.lib.optionalString stdenv.cc.isGNU "-lgcc_s";
 
   # Patch 'torify' to point directly to torsocks.
   patchPhase = ''

pkgs/tools/video/rtmpdump/default.nix

@@ -24,7 +24,7 @@ stdenv.mkDerivation rec {
     ++ optional gnutlsSupport "CRYPTO=GNUTLS"
     ++ optional opensslSupport "CRYPTO=OPENSSL"
     ++ optional stdenv.isDarwin "SYS=darwin"
-    ++ optional (stdenv.cc.cc.isClang or false) "CC=clang";
+    ++ optional stdenv.cc.isClang "CC=clang";
 
   buildInputs = [ zlib ]
     ++ optional gnutlsSupport gnutls