// gc runs the compiler in a specific directory on a set of files
	// and returns the name of the generated output file.
	gc(b *Builder, a *Action, archive string, importcfg, embedcfg []byte, symabis string, asmhdr bool, pgoProfile string, gofiles []string) (ofile string, out []byte, err error)
	// cc runs the toolchain's C compiler in a directory on a C file
	// to produce an output file.