if symabis != "" {
		defaultGcFlags = append(defaultGcFlags, "-symabis", symabis)
	}

	gcflags := str.StringList(forcedGcflags, p.Internal.Gcflags)
	if p.Internal.FuzzInstrument {
		gcflags = append(gcflags, fuzzInstrumentFlags()...)
	}
	// Add -c=N to use concurrent backend compilation, if possible.
	if c := gcBackendConcurrency(gcflags); c > 1 {
		defaultGcFlags = append(defaultGcFlags, fmt.Sprintf("-c=%d", c))
	}

	}
	if p.Internal.Cover.Mode != "" {
		fmt.Fprintf(h, "cover %q %q\n", p.Internal.Cover.Mode, b.toolID("cover"))
	}
	if p.Internal.FuzzInstrument {
		if fuzzFlags := fuzzInstrumentFlags(); fuzzFlags != nil {
			fmt.Fprintf(h, "fuzz %q\n", fuzzFlags)
		}
	}
	if p.Internal.BuildInfo != nil {
		fmt.Fprintf(h, "modinfo %q\n", p.Internal.BuildInfo.String())
	}