cc-wrapper: Make gccgo look like go (#430137)

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

@@ -106,7 +106,7 @@ let
     versionAtLeast
     ;
 
-  inherit (stdenvNoCC) hostPlatform targetPlatform;
+  inherit (stdenvNoCC) buildPlatform hostPlatform targetPlatform;
 
   includeFortifyHeaders' =
     if includeFortifyHeaders != null then
@@ -445,6 +445,13 @@ stdenvNoCC.mkDerivation {
     inherit nixSupport;
 
     inherit defaultHardeningFlags;
+  }
+  // optionalAttrs cc.langGo or false {
+    # So gccgo looks more like go for buildGoModule
+
+    inherit (targetPlatform.go) GOOS GOARCH GOARM;
+
+    CGO_ENABLED = 1;
   };
 
   dontBuild = true;
@@ -873,6 +880,9 @@ stdenvNoCC.mkDerivation {
     + optionalString cc.langFortran or false ''
       hardening_unsupported_flags+=" format"
     ''
+    + optionalString cc.langGo or false ''
+      hardening_unsupported_flags+=" format"
+    ''
     + optionalString targetPlatform.isWasm ''
       hardening_unsupported_flags+=" stackprotector fortify pie pic"
     ''