pkgs := goDirPackages(t.T, longdir, singlefilepkgs)
		// Split flags into gcflags and ldflags
		ldflags := []string{}
		for i, fl := range flags {
			if fl == "-ldflags" {
				ldflags = flags[i+1:]
				flags = flags[0:i]
				break
			}
		}

		importcfgfile := importcfg(pkgs)

		for i, pkg := range pkgs {
			_, err := compileInDir(runcmd, longdir, flags, importcfgfile, pkg.name, pkg.files...)

	}
	if opts.cpu != "" {
		run = append(run, "-cpu="+opts.cpu)
	}
	if t.json {
		run = append(run, "-json")
	}

	if opts.gcflags != "" {
		build = append(build, "-gcflags=all="+opts.gcflags)
	}
	if opts.ldflags != "" {
		build = append(build, "-ldflags="+opts.ldflags)
	}
	if opts.buildmode != "" {
		build = append(build, "-buildmode="+opts.buildmode)
	}

	pkgs = opts.packages()

		fatalf("json marshal error: %v", err)
	}
	if _, err := os.Stdout.Write(out); err != nil {
		fatalf("write failed: %v", err)
	}
}

func setNoOpt() {
	for _, gcflag := range strings.Split(gogcflags, " ") {
		if gcflag == "-N" || gcflag == "-l" {
			noOpt = true
			break
		}
	}

	skipIfGccgo(t, "gccgo does not support -ldflags -X")
	tooSlow(t, "compiles and links a binary")

	tg := testgo(t)
	defer tg.cleanup()
	tg.parallel()
	tg.tempFile("main.go", `package main
		var extern string
		func main() {
			println(extern)
		}`)
	tg.run("run", "-ldflags", `-X "main.extern=hello world"`, tg.path("main.go"))
	tg.grepStderr("^hello world", `ldflags -X "main.extern=hello world"' failed`)
}

				case 'i':
					cflags |= REG_ICASE;
					continue;
				case 'j':
					cflags |= REG_SPAN;
					continue;
				case 'k':
					cflags |= REG_ESCAPE;
					continue;
				case 'l':
					cflags |= REG_LEFT;
					continue;
				case 'm':
					cflags |= REG_MINIMAL;
					continue;
				case 'n':
					cflags |= REG_NEWLINE;
					continue;
				case 'o':
					cflags |= REG_SHELL_GROUP;

	// Bitmaps and other side structures used to store data used to store
	// symbol flags/attributes; these are to be accessed via the
	// corresponding loader "AttrXXX" and "SetAttrXXX" methods. Please
	// visit the comments on these methods for more details on the
	// semantics / interpretation of the specific flags or attribute.
	attrReachable        Bitmap // reachable symbols, indexed by global index

			}
			args[i] = arg
		}

		switch verb {
		case "CFLAGS", "CPPFLAGS", "CXXFLAGS", "FFLAGS", "LDFLAGS":
			// Change relative paths to absolute.
			ctxt.makePathsAbsolute(args, di.Dir)
		}

		switch verb {
		case "CFLAGS":
			di.CgoCFLAGS = append(di.CgoCFLAGS, args...)
		case "CPPFLAGS":
			di.CgoCPPFLAGS = append(di.CgoCPPFLAGS, args...)
		case "CXXFLAGS":

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_fchflags_trampoline_addr uintptr

//go:cgo_import_dynamic libc_fchflags fchflags "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_fchflags_trampoline_addr uintptr

//go:cgo_import_dynamic libc_fchflags fchflags "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_fchflags_trampoline()

//go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"