rocmPackages.llvm.clang: remove -nostdlibinc flag (#370180)

pkgs/build-support/cc-wrapper/default.nix

@@ -639,7 +639,7 @@ stdenvNoCC.mkDerivation {
     # no `/usr/include`, there’s essentially no risk to dropping
     # the flag there. See discussion in NixOS/nixpkgs#191152.
     #
-    + optionalString ((cc.isClang or false) && !targetPlatform.isDarwin) ''
+    + optionalString ((cc.isClang or false) && !(cc.isROCm or false) && !targetPlatform.isDarwin) ''
       echo " -nostdlibinc" >> $out/nix-support/cc-cflags
     ''
 

pkgs/development/rocm-modules/5/llvm/base.nix

@@ -180,6 +180,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru = {
     isLLVM = targetDir == "llvm";
     isClang = targetDir == "clang" || builtins.elem "clang" targetProjects;
+    isROCm = true;
 
     updateScript = rocmUpdateScript {
       name = finalAttrs.pname;

pkgs/development/rocm-modules/5/llvm/stage-3/clang.nix

@@ -40,8 +40,11 @@ wrapCCWith rec {
     '';
 
     passthru.isClang = true;
+    passthru.isROCm = true;
   });
 
+  gccForLibs = stdenv.cc.cc;
+
   extraPackages = [
     llvm
     lld

pkgs/development/rocm-modules/6/llvm/base.nix

@@ -188,6 +188,7 @@ stdenv.mkDerivation (finalAttrs: {
   passthru = {
     isLLVM = targetDir == "llvm";
     isClang = targetDir == "clang" || builtins.elem "clang" targetProjects;
+    isROCm = true;
 
     updateScript = rocmUpdateScript {
       name = finalAttrs.pname;

pkgs/development/rocm-modules/6/llvm/stage-3/clang.nix

@@ -40,8 +40,11 @@ wrapCCWith rec {
     '';
 
     passthru.isClang = true;
+    passthru.isROCm = true;
   });
 
+  gccForLibs = stdenv.cc.cc;
+
   extraPackages = [
     llvm
     lld