}

type Logger interface {
	// Logf logs a message from the compiler.
	Logf(string, ...interface{})

	// Log reports whether logging is not a no-op
	// some logging calls account for more than a few heap allocations.
	Log() bool

	// Fatalf reports a compiler error and exits.
	Fatalf(pos src.XPos, msg string, args ...interface{})

		*mode = BuildModePIE
	case "c-archive":
		*mode = BuildModeCArchive
	case "c-shared":
		*mode = BuildModeCShared
	case "shared":
		*mode = BuildModeShared
	case "plugin":
		*mode = BuildModePlugin
	}

	if !platform.BuildModeSupported("gc", s, buildcfg.GOOS, buildcfg.GOARCH) {
		return fmt.Errorf("buildmode %s not supported on %s/%s", s, buildcfg.GOOS, buildcfg.GOARCH)
	}

	return nil
}