if b.gccSupportsFlag(compiler, "-fsplit-stack") {
		defs = append(defs, "-fsplit-stack")
	}
	defs = tools.maybePIC(defs)
	if b.gccSupportsFlag(compiler, "-ffile-prefix-map=a=b") {
		defs = append(defs, "-ffile-prefix-map="+base.Cwd()+"=.")
		defs = append(defs, "-ffile-prefix-map="+b.WorkDir+"=/tmp/go-build")
	} else if b.gccSupportsFlag(compiler, "-fdebug-prefix-map=a=b") {