1 files changed, 11 insertions, 3 deletions
diff --git a/libgo/go/cmd/go/internal/work/action.go b/libgo/go/cmd/go/internal/work/action.go
index eabac6bd14e..db422fd9935 100644
--- a/libgo/go/cmd/go/internal/work/action.go
+++ b/libgo/go/cmd/go/internal/work/action.go
@@ -291,11 +291,12 @@ func (b *Builder) Init() {
 		}
 	}
 
-	if _, ok := cfg.OSArchSupportsCgo[cfg.Goos+"/"+cfg.Goarch]; !ok && cfg.BuildContext.Compiler == "gc" {
-		fmt.Fprintf(os.Stderr, "cmd/go: unsupported GOOS/GOARCH pair %s/%s\n", cfg.Goos, cfg.Goarch)
+	if err := CheckGOOSARCHPair(cfg.Goos, cfg.Goarch); err != nil {
+		fmt.Fprintf(os.Stderr, "cmd/go: %v\n", err)
 		base.SetExitStatus(2)
 		base.Exit()
 	}
+
 	for _, tag := range cfg.BuildContext.BuildTags {
 		if strings.Contains(tag, ",") {
 			fmt.Fprintf(os.Stderr, "cmd/go: -tags space-separated list contains comma\n")
@@ -305,6 +306,13 @@ func (b *Builder) Init() {
 	}
 }
 
+func CheckGOOSARCHPair(goos, goarch string) error {
+	if _, ok := cfg.OSArchSupportsCgo[goos+"/"+goarch]; !ok && cfg.BuildContext.Compiler == "gc" {
+		return fmt.Errorf("unsupported GOOS/GOARCH pair %s/%s", goos, goarch)
+	}
+	return nil
+}
+
 // NewObjdir returns the name of a fresh object directory under b.WorkDir.
 // It is up to the caller to call b.Mkdir on the result at an appropriate time.
 // The result ends in a slash, so that file names in that directory
@@ -707,7 +715,7 @@ func (b *Builder) addInstallHeaderAction(a *Action) {
 }
 
 // buildmodeShared takes the "go build" action a1 into the building of a shared library of a1.Deps.
-// That is, the input a1 represents "go build pkgs" and the result represents "go build -buidmode=shared pkgs".
+// That is, the input a1 represents "go build pkgs" and the result represents "go build -buildmode=shared pkgs".
 func (b *Builder) buildmodeShared(mode, depMode BuildMode, args []string, pkgs []*load.Package, a1 *Action) *Action {
 	name, err := libname(args, pkgs)
 	if err != nil {