cmd/go: don't check standard packages when using gccgo

The gccgo compiler does not have the standard packages available, so it
can not check for violations of internal references.

Also, the gccgo compiler can not read runtime/internal/sys/zversion.go;
in fact, the file does not even exist for gccgo.

Change-Id: Ibadf16b371621ad1b87b6e858c5eb233913e179d
Reviewed-on: https://go-review.googlesource.com/33295
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

diff --git a/src/cmd/go/pkg.go b/src/cmd/go/pkg.go
index 064a428703b08f7b2fd7807f3e9772b5d920e005..8b31d2f64d3308d35017c5291c86cff85d577143 100644 (file)
--- a/src/cmd/go/pkg.go
+++ b/src/cmd/go/pkg.go
@@ -586,6 +586,11 @@ func disallowInternal(srcDir string, p *Package, stk *importStack) *Package {
                return p
        }
 
+       // We can't check standard packages with gccgo.
+       if buildContext.Compiler == "gccgo" && p.Standard {
+               return p
+       }
+
        // The stack includes p.ImportPath.
        // If that's the only thing on the stack, we started
        // with a name given on the command line, not an
@@ -1634,7 +1639,7 @@ func computeBuildID(p *Package) {
        // Include the content of runtime/internal/sys/zversion.go in the hash
        // for package runtime. This will give package runtime a
        // different build ID in each Go release.
-       if p.Standard && p.ImportPath == "runtime/internal/sys" {
+       if p.Standard && p.ImportPath == "runtime/internal/sys" && buildContext.Compiler != "gccgo" {
                data, err := ioutil.ReadFile(filepath.Join(p.Dir, "zversion.go"))
                if err != nil {
                        fatalf("go: %s", err)