cgoCFLAGS = append(cgoCFLAGS, "-fsplit-stack")
		}
		cgoflags = append(cgoflags, "-gccgo")
		if pkgpath := gccgoPkgpath(p); pkgpath != "" {
			cgoflags = append(cgoflags, "-gccgopkgpath="+pkgpath)
		}
		if !BuildToolchain.(gccgoToolchain).supportsCgoIncomplete(b, a) {
			cgoflags = append(cgoflags, "-gccgo_define_cgoincomplete")
		}
	}

//		Does not apply to the CGO_CFLAGS environment variable.
//	CGO_CPPFLAGS, CGO_CPPFLAGS_ALLOW, CGO_CPPFLAGS_DISALLOW
//		Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
//		but for the C preprocessor.
//	CGO_CXXFLAGS, CGO_CXXFLAGS_ALLOW, CGO_CXXFLAGS_DISALLOW
//		Like CGO_CFLAGS, CGO_CFLAGS_ALLOW, and CGO_CFLAGS_DISALLOW,
//		but for the C++ compiler.
//	CGO_FFLAGS, CGO_FFLAGS_ALLOW, CGO_FFLAGS_DISALLOW

		// support for memory sanitizer. Assume they are built without,
		// and drop them.
		p.SysoFiles = nil
	}
	p.CgoCFLAGS = pp.CgoCFLAGS
	p.CgoCPPFLAGS = pp.CgoCPPFLAGS
	p.CgoCXXFLAGS = pp.CgoCXXFLAGS
	p.CgoFFLAGS = pp.CgoFFLAGS
	p.CgoLDFLAGS = pp.CgoLDFLAGS
	p.CgoPkgConfig = pp.CgoPkgConfig
	// We modify p.Imports in place, so make copy now.
	p.Imports = make([]string, len(pp.Imports))