knows that the eventual host link command must include the -lm
argument, so that the host linker will be able to find 'sin' in the
math library.

cmd/link Command Line Interface

The go command and any other Go-aware build systems invoke cmd/link
to link a collection of packages into a single binary. By default, cmd/link will
present the same interface it does today:

	cmd/link main.a

			fstat(fd, callback) { callback(enosys()); },
			fsync(fd, callback) { callback(null); },
			ftruncate(fd, length, callback) { callback(enosys()); },
			lchown(path, uid, gid, callback) { callback(enosys()); },
			link(path, link, callback) { callback(enosys()); },
			lstat(path, callback) { callback(enosys()); },
			mkdir(path, perm, callback) { callback(enosys()); },
			open(path, flags, mode, callback) { callback(enosys()); },

pkg syscall (netbsd-arm64), const SYS_EXTATTR_LIST_LINK ideal-int
pkg syscall (netbsd-arm64), const SYS_EXTATTR_SET_FD = 364
pkg syscall (netbsd-arm64), const SYS_EXTATTR_SET_FD ideal-int
pkg syscall (netbsd-arm64), const SYS_EXTATTR_SET_FILE = 361
pkg syscall (netbsd-arm64), const SYS_EXTATTR_SET_FILE ideal-int
pkg syscall (netbsd-arm64), const SYS_EXTATTR_SET_LINK = 367

	"strings"
	"testing"

	"cmd/asm/internal/arch"
	"cmd/asm/internal/lex"
	"cmd/internal/obj"
)

// A simple in-out test: Do we print what we parse?

func setArch(goarch string) (*arch.Arch, *obj.Link) {
	buildcfg.GOOS = "linux" // obj can handle this OS for all architectures.
	buildcfg.GOARCH = goarch
	architecture := arch.Set(goarch, false)
	if architecture == nil {
		panic("asm: unrecognized architecture " + goarch)

	c_ISREG  = 0100000 // Regular file
	c_ISLNK  = 0120000 // Symbolic link
	c_ISBLK  = 060000  // Block special file
	c_ISCHR  = 020000  // Character special file
	c_ISSOCK = 0140000 // Socket
)

// FileInfoHeader creates a partially-populated [Header] from fi.
// If fi describes a symlink, FileInfoHeader records link as the link target.
// If fi describes a directory, a slash is appended to the name.
//

pkg debug/elf, const SHF_ALLOC SectionFlag
pkg debug/elf, const SHF_EXECINSTR SectionFlag
pkg debug/elf, const SHF_GROUP SectionFlag
pkg debug/elf, const SHF_INFO_LINK SectionFlag
pkg debug/elf, const SHF_LINK_ORDER SectionFlag
pkg debug/elf, const SHF_MASKOS SectionFlag
pkg debug/elf, const SHF_MASKPROC SectionFlag
pkg debug/elf, const SHF_MERGE SectionFlag

		Mode:   0755 | fs.ModeSetuid,
	},
	{
		Name:   "setgid",
		Data:   []byte("setgid file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSetgid,
	},
	{
		Name:   "symlink",
		Data:   []byte("../link/target"),
		Method: Deflate,
		Mode:   0755 | fs.ModeSymlink,
	},
	{
		Name:   "device",
		Data:   []byte("device file"),
		Method: Deflate,
		Mode:   0755 | fs.ModeDevice,
	},
	{

pkg syscall (freebsd-arm64), const SYS___ACL_GET_LINK ideal-int
pkg syscall (freebsd-arm64), const SYS___ACL_SET_FD = 350
pkg syscall (freebsd-arm64), const SYS___ACL_SET_FD ideal-int
pkg syscall (freebsd-arm64), const SYS___ACL_SET_FILE = 348
pkg syscall (freebsd-arm64), const SYS___ACL_SET_FILE ideal-int
pkg syscall (freebsd-arm64), const SYS___ACL_SET_LINK = 426

pkg syscall (darwin-arm64), const AF_ISO ideal-int
pkg syscall (darwin-arm64), const AF_LAT = 14
pkg syscall (darwin-arm64), const AF_LAT ideal-int
pkg syscall (darwin-arm64), const AF_LINK = 18
pkg syscall (darwin-arm64), const AF_LINK ideal-int
pkg syscall (darwin-arm64), const AF_LOCAL = 1
pkg syscall (darwin-arm64), const AF_LOCAL ideal-int
pkg syscall (darwin-arm64), const AF_MAX = 40

		"-w",          // no warnings
		"-Wno-error",  // warnings are not errors
		"-o"+gccTmp(), // write object to tmp
		"-gdwarf-2",   // generate DWARF v2 debugging symbols
		"-c",          // do not link
		"-xc",         // input language is C
	)
	if p.GccIsClang {
		c = append(c,
			"-ferror-limit=0",
			// Apple clang version 1.7 (tags/Apple/clang-77) (based on LLVM 2.9svn)