1 files changed, 7 insertions, 13 deletions
diff --git a/nixpkgs/pkgs/development/compilers/llvm/6/default.nix b/nixpkgs/pkgs/development/compilers/llvm/6/default.nix
index b544a4f6ba6..4c2e87ec5e1 100644
--- a/nixpkgs/pkgs/development/compilers/llvm/6/default.nix
+++ b/nixpkgs/pkgs/development/compilers/llvm/6/default.nix
@@ -1,5 +1,6 @@
-{ lowPrio, newScope, pkgs, stdenv, cmake, gcc, libstdcxxHook
+{ lowPrio, newScope, pkgs, stdenv, cmake, gccForLibs
 , libxml2, python3, isl, fetchurl, overrideCC, wrapCCWith
+, buildPackages
 , buildLlvmTools # tools, but from the previous stage, for cross
 , targetLlvmLibraries # libraries, but from the next stage, for cross
 }:
@@ -24,8 +25,8 @@ let
       ln -s "${cc}/lib/clang/${release_version}/include" "$rsrc"
       ln -s "${targetLlvmLibraries.compiler-rt.out}/lib" "$rsrc/lib"
       echo "-resource-dir=$rsrc" >> $out/nix-support/cc-cflags
-    '' + stdenv.lib.optionalString (stdenv.targetPlatform.isLinux && tools.clang-unwrapped ? gcc && !(stdenv.targetPlatform.useLLVM or false)) ''
-      echo "--gcc-toolchain=${tools.clang-unwrapped.gcc}" >> $out/nix-support/cc-cflags
+    '' + stdenv.lib.optionalString (stdenv.targetPlatform.isLinux && !(stdenv.targetPlatform.useLLVM or false)) ''
+      echo "--gcc-toolchain=${gccForLibs}" >> $out/nix-support/cc-cflags
     '';
   in {
 
@@ -51,25 +52,18 @@ let
 
     libstdcxxClang = wrapCCWith rec {
       cc = tools.clang-unwrapped;
-      extraTools = [
-        libstdcxxHook
-      ];
+      # libstdcxx is taken from gcc in an ad-hoc way in cc-wrapper.
+      libcxx = null;
       extraPackages = [
         targetLlvmLibraries.compiler-rt
       ];
-      extraBuildCommands = ''
-          echo "-target ${targetConfig}" >> $out/nix-support/cc-cflags
-          echo "-B${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-cflags
-          echo "-L${gcc.cc}/lib/gcc/${targetConfig}/${gcc.version}" >> $out/nix-support/cc-ldflags
-          echo "-L${gcc.cc.lib}/${targetConfig}/lib" >> $out/nix-support/cc-ldflags
-      '' + mkExtraBuildCommands cc;
+      extraBuildCommands = mkExtraBuildCommands cc;
     };
 
     libcxxClang = wrapCCWith rec {
       cc = tools.clang-unwrapped;
       libcxx = targetLlvmLibraries.libcxx;
       extraPackages = [
-        targetLlvmLibraries.libcxx
         targetLlvmLibraries.libcxxabi
         targetLlvmLibraries.compiler-rt
       ];