},
				Imports:    ximports,
				RawImports: rawXTestImports,

				Asmflags:       p.Internal.Asmflags,
				Gcflags:        p.Internal.Gcflags,
				Ldflags:        p.Internal.Ldflags,
				Gccgoflags:     p.Internal.Gccgoflags,
				Embed:          xtestEmbed,
				OrigImportPath: p.Internal.OrigImportPath,
				PGOProfile:     p.Internal.PGOProfile,
			},
		}
		if pxtestNeedsPtest {

			buildmode = "archive"
		}
	}
	appendSetting("-buildmode", buildmode)
	appendSetting("-compiler", cfg.BuildContext.Compiler)
	if gccgoflags := BuildGccgoflags.String(); gccgoflags != "" && cfg.BuildContext.Compiler == "gccgo" {
		appendSetting("-gccgoflags", gccgoflags)
	}
	if gcflags := BuildGcflags.String(); gcflags != "" && cfg.BuildContext.Compiler == "gc" {
		appendSetting("-gcflags", gcflags)
	}

			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")
		}
	}

	switch cfg.BuildBuildmode {

	tg.runFail("build", "x")
	tg.grepStderr("invalid input file name \"-y.go\"", "did not reject -y.go")
	tg.must(os.Remove(tg.path("src/x/-y.go")))

	if runtime.Compiler == "gccgo" {
		tg.runFail("build", "-gccgoflags=all=@x", "x")
	} else {
		tg.runFail("build", "-gcflags=all=@x", "x")
	}
	tg.grepStderr("invalid command-line argument @x in command", "did not reject @x during exec")

//		cannot be included due to a missing tool or ambiguous directory structure.
//	-compiler name
//		name of compiler to use, as in runtime.Compiler (gccgo or gc).
//	-gccgoflags '[pattern=]arg list'
//		arguments to pass on each gccgo compiler/linker invocation.
//	-gcflags '[pattern=]arg list'
//		arguments to pass on each go tool compile invocation.
//	-installsuffix suffix