cmd/go: Go 1.8.x cannot build executables for darwin_arm and darwin_arm64 on macOS, but Go 1.7.x could #20456
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help wanted
mobile
Android, iOS, and x/mobile
NeedsInvestigation
Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
OS-Darwin
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Comments
|
FWIW, based on the output of |
bradfitz
changed the title
bradfitz
added
help wanted
NeedsInvestigation
|
/cc @ianlancetaylor |
|
@akutz, does it work if you set CGO_ENABLED=0 explicitly? Do you need cgo support in your actual code? |
|
Hi @bradfitz, It does not work if I set FWIW, In my actual product I wasn't even aware I was using Cgo, but it appeared I was in a transitive dependency: $ for pkg in \
> $(GOARCH=arm go list -f '{{join .Deps "\n"}}' "github.com/codedellemc/libstorage/cli/lsx/lsx-darwin" | \
> grep 'github.com/codedellemc/libstorage'); do \
> pkg=$(echo "$pkg" | cut -c35-) && \
> for f in $(find "$(echo "$GOPATH" | awk -F: '{print $1}')/src/github.com/codedellemc/libstorage/${pkg}" -name "*.go" -type f); do \
> if grep 'import "C"' "$f" > /dev/null 2>&1; then \
> echo $f; \
> fi; \
> done; \
> done
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_darwin.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_dragonfly.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_freebsd.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_linux.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_netbsd.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_openbsd.go
/Users/akutz/Projects/go/src/github.com/codedellemc/libstorage/vendor/golang.org/x/sys/unix/types_solaris.goHowever, for the example I outlined above in the issue description, I absolutely was not, at least not via non-Stdlib dependencies. For stdlib there is still Cgo in play: Example from above$ pwd
/Users/akutz/Projects/go/src/hello
[0]akutz@pax:hello$ cat main.gopackage main
import (
"fmt"
"runtime"
)
func main() {
fmt.Printf("%s_%s\n", runtime.GOOS, runtime.GOARCH)
}Go 1.7.4 Stdlib Cgo Dependencies for
|
|
Hi @bradfitz, FWIW here's a diff between all of above "Hello" project's 1.8.1's Stdlib sources that import C with those from 1.7.4: [0]akutz@pax:hello$ for pkg in $(GOARCH=arm /Users/akutz/.go/1.8.1/bin/go list -f '{{join .Deps "\n"}}' "hello"); do \
> for f in $(find "/Users/akutz/.go/1.8.1/src/${pkg}" -name "*.go" -type f); do \
> if grep 'import "C"' "$f" > /dev/null 2>&1; then \
> s4="$(echo $f | sed 's/1.8.1/1.7.4/g')" && \
> echo "diff $s4 $f" && \
> diff "$s4" "$f"; \
> echo; echo; \
> fi; \
> done; \
> done;
diff /Users/akutz/.go/1.7.4/src/os/user/getgrouplist_darwin.go /Users/akutz/.go/1.8.1/src/os/user/getgrouplist_darwin.go
diff /Users/akutz/.go/1.7.4/src/os/user/getgrouplist_unix.go /Users/akutz/.go/1.8.1/src/os/user/getgrouplist_unix.go
diff /Users/akutz/.go/1.7.4/src/os/user/listgroups_unix.go /Users/akutz/.go/1.8.1/src/os/user/listgroups_unix.go
diff /Users/akutz/.go/1.7.4/src/os/user/lookup_unix.go /Users/akutz/.go/1.8.1/src/os/user/lookup_unix.go
diff /Users/akutz/.go/1.7.4/src/runtime/cgo/cgo.go /Users/akutz/.go/1.8.1/src/runtime/cgo/cgo.go
23,25d22
< // we must explicitly link msvcrt, because runtime needs ntdll, and ntdll
< // exports some incompatible libc functions. See golang.org/issue/12030.
< #cgo windows LDFLAGS: -lmsvcrt -lm -mthreads
diff /Users/akutz/.go/1.7.4/src/runtime/defs1_linux.go /Users/akutz/.go/1.8.1/src/runtime/defs1_linux.go
36c36
< type SigaltstackT C.struct_sigaltstack
---
> type StackT C.stack_t
diff /Users/akutz/.go/1.7.4/src/runtime/defs2_linux.go /Users/akutz/.go/1.8.1/src/runtime/defs2_linux.go
142c142
< type SigaltstackT C.struct_sigaltstack
---
> type StackT C.stack_t
diff /Users/akutz/.go/1.7.4/src/runtime/defs3_linux.go /Users/akutz/.go/1.8.1/src/runtime/defs3_linux.go
38c38
< type SigaltstackT C.struct_sigaltstack
---
> type StackT C.stack_t
diff /Users/akutz/.go/1.7.4/src/runtime/defs_arm_linux.go /Users/akutz/.go/1.8.1/src/runtime/defs_arm_linux.go
118c118
< type SigaltstackT C.struct_sigaltstack
---
> type StackT C.stack_t
diff /Users/akutz/.go/1.7.4/src/runtime/defs_darwin.go /Users/akutz/.go/1.8.1/src/runtime/defs_darwin.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_dragonfly.go /Users/akutz/.go/1.8.1/src/runtime/defs_dragonfly.go
112d111
< type SigaltstackT C.struct_sigaltstack
diff /Users/akutz/.go/1.7.4/src/runtime/defs_freebsd.go /Users/akutz/.go/1.8.1/src/runtime/defs_freebsd.go
123d122
< type SigaltstackT C.struct_sigaltstack
diff /Users/akutz/.go/1.7.4/src/runtime/defs_linux.go /Users/akutz/.go/1.8.1/src/runtime/defs_linux.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_netbsd.go /Users/akutz/.go/1.8.1/src/runtime/defs_netbsd.go
112d111
< type SigaltstackT C.struct_sigaltstack
diff /Users/akutz/.go/1.7.4/src/runtime/defs_netbsd_386.go /Users/akutz/.go/1.8.1/src/runtime/defs_netbsd_386.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_netbsd_amd64.go /Users/akutz/.go/1.8.1/src/runtime/defs_netbsd_amd64.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_netbsd_arm.go /Users/akutz/.go/1.8.1/src/runtime/defs_netbsd_arm.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_openbsd.go /Users/akutz/.go/1.8.1/src/runtime/defs_openbsd.go
109d108
< type SigaltstackT C.struct_sigaltstack
diff /Users/akutz/.go/1.7.4/src/runtime/defs_solaris.go /Users/akutz/.go/1.8.1/src/runtime/defs_solaris.go
136d135
< type SigaltstackT C.struct_sigaltstack
diff /Users/akutz/.go/1.7.4/src/runtime/defs_solaris_amd64.go /Users/akutz/.go/1.8.1/src/runtime/defs_solaris_amd64.go
diff /Users/akutz/.go/1.7.4/src/runtime/defs_windows.go /Users/akutz/.go/1.8.1/src/runtime/defs_windows.go
diff /Users/akutz/.go/1.7.4/src/runtime/msan/msan.go /Users/akutz/.go/1.8.1/src/runtime/msan/msan.go
diff /Users/akutz/.go/1.7.4/src/runtime/race/output_test.go /Users/akutz/.go/1.8.1/src/runtime/race/output_test.go
9a10
> "internal/testenv"
14a16
> "runtime"
20a23,26
> if test.goos != "" && test.goos != runtime.GOOS {
> t.Logf("test %v runs only on %v, skipping: ", test.name, test.goos)
> continue
> }
44c50
< cmd := exec.Command("go", test.run, "-race", "-gcflags=-l", src)
---
> cmd := exec.Command(testenv.GoToolPath(t), test.run, "-race", "-gcflags=-l", src)
68a75
> goos string
73c80
< {"simple", "run", "atexit_sleep_ms=0", `
---
> {"simple", "run", "", "atexit_sleep_ms=0", `
118c125
< {"exitcode", "run", "atexit_sleep_ms=0 exitcode=13", `
---
> {"exitcode", "run", "", "atexit_sleep_ms=0 exitcode=13", `
132c139
< {"strip_path_prefix", "run", "atexit_sleep_ms=0 strip_path_prefix=/main.", `
---
> {"strip_path_prefix", "run", "", "atexit_sleep_ms=0 strip_path_prefix=/main.", `
148c155
< {"halt_on_error", "run", "atexit_sleep_ms=0 halt_on_error=1", `
---
> {"halt_on_error", "run", "", "atexit_sleep_ms=0 halt_on_error=1", `
165c172
< {"test_fails_on_race", "test", "atexit_sleep_ms=0", `
---
> {"test_fails_on_race", "test", "", "atexit_sleep_ms=0", `
180,181c187,188
< PASS
< Found 1 data race\(s\)
---
> --- FAIL: TestFail \(0...s\)
> .*testing.go:.*: race detected during execution of test
184c191
< {"slicebytetostring_pc", "run", "atexit_sleep_ms=0", `
---
> {"slicebytetostring_pc", "run", "", "atexit_sleep_ms=0", `
199a207,259
>
> // Test for http://golang.org/issue/17190
> {"external_cgo_thread", "run", "linux", "atexit_sleep_ms=0", `
> package main
>
> /*
> #include <pthread.h>
> typedef struct cb {
> int foo;
> } cb;
> extern void goCallback();
> static inline void *threadFunc(void *p) {
> goCallback();
> return 0;
> }
> static inline void startThread(cb* c) {
> pthread_t th;
> pthread_create(&th, 0, threadFunc, 0);
> }
> */
> import "C"
>
> import "time"
>
> var racy int
>
> //export goCallback
> func goCallback() {
> racy++
> }
>
> func main() {
> var c C.cb
> C.startThread(&c)
> time.Sleep(time.Second)
> racy++
> }
> `, `==================
> WARNING: DATA RACE
> Read at 0x[0-9,a-f]+ by main goroutine:
> main\.main\(\)
> .*/main\.go:34 \+0x[0-9,a-f]+
>
> Previous write at 0x[0-9,a-f]+ by goroutine [0-9]:
> main\.goCallback\(\)
> .*/main\.go:27 \+0x[0-9,a-f]+
> main._cgoexpwrap_[0-9a-z]+_goCallback\(\)
> .*/_cgo_gotypes\.go:[0-9]+ \+0x[0-9,a-f]+
>
> Goroutine [0-9] \(running\) created at:
> runtime\.newextram\(\)
> .*/runtime/proc.go:[0-9]+ \+0x[0-9,a-f]+
> ==================`},
diff /Users/akutz/.go/1.7.4/src/runtime/race/race.go /Users/akutz/.go/1.8.1/src/runtime/race/race.go
diff /Users/akutz/.go/1.7.4/src/runtime/race/testdata/cgo_test_main.go /Users/akutz/.go/1.8.1/src/runtime/race/testdata/cgo_test_main.go
diff /Users/akutz/.go/1.7.4/src/runtime/runtime-gdb_test.go /Users/akutz/.go/1.8.1/src/runtime/runtime-gdb_test.go
9a10
> "go/build"
17a19
> "strings"
25a28,30
> if runtime.GOOS == "linux" && runtime.GOARCH == "ppc64" {
> t.Skip("skipping gdb tests on linux/ppc64; see golang.org/issue/17366")
> }
66d70
< package main
67a72
> var gslice []string
74c79,81
< fmt.Println("hi") // line 10
---
> slicevar := make([]string, 0, 16)
> slicevar = append(slicevar, mapvar["abc"])
> fmt.Println("hi") // line 12
75a83
> gslice = slicevar
79a88,103
> testGdbPython(t, false)
> }
>
> func TestGdbPythonCgo(t *testing.T) {
> testGdbPython(t, true)
> }
>
> func testGdbPython(t *testing.T, cgo bool) {
> if runtime.GOARCH == "mips64" {
> testenv.SkipFlaky(t, 18173)
> }
> if cgo && !build.Default.CgoEnabled {
> t.Skip("skipping because cgo is not enabled")
> }
>
> t.Parallel()
89a114,120
> var buf bytes.Buffer
> buf.WriteString("package main\n")
> if cgo {
> buf.WriteString(`import "C"` + "\n")
> }
> buf.WriteString(helloSource)
>
91c122
< err = ioutil.WriteFile(src, []byte(helloSource), 0644)
---
> err = ioutil.WriteFile(src, buf.Bytes(), 0644)
96c127
< cmd := exec.Command("go", "build", "-o", "a.exe")
---
> cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
108c139
< "-ex", "br main.go:10",
---
> "-ex", "br fmt.Println",
112a144
> "-ex", "up", // up from fmt.Println to main
118,129c150,158
< "-ex", "echo END\n"}
<
< // without framepointer, gdb cannot backtrace our non-standard
< // stack frames on RISC architectures.
< canBackTrace := false
< switch runtime.GOARCH {
< case "amd64", "386", "ppc64", "ppc64le", "arm", "arm64", "mips64", "mips64le", "s390x":
< canBackTrace = true
< args = append(args,
< "-ex", "echo BEGIN goroutine 2 bt\n",
< "-ex", "goroutine 2 bt",
< "-ex", "echo END\n")
---
> "-ex", "echo END\n",
> "-ex", "echo BEGIN info locals\n",
> "-ex", "info locals",
> "-ex", "echo END\n",
> "-ex", "down", // back to fmt.Println (goroutine 2 below only works at bottom of stack. TODO: fix that)
> "-ex", "echo BEGIN goroutine 2 bt\n",
> "-ex", "goroutine 2 bt",
> "-ex", "echo END\n",
> filepath.Join(dir, "a.exe"),
131,132d159
<
< args = append(args, filepath.Join(dir, "a.exe"))
140c167
< cmd := exec.Command("go", "env", "GOROOT")
---
> cmd := exec.Command(testenv.GoToolPath(t), "env", "GOROOT")
174a202,210
> // Issue 16338: ssa decompose phase can split a structure into
> // a collection of scalar vars holding the fields. In such cases
> // the DWARF variable location expression should be of the
> // form "var.field" and not just "field".
> infoLocalsRe := regexp.MustCompile(`^slicevar.len = `)
> if bl := blocks["info locals"]; !infoLocalsRe.MatchString(bl) {
> t.Fatalf("info locals failed: %s", bl)
> }
>
176c212
< if bl := blocks["goroutine 2 bt"]; canBackTrace && !btGoroutineRe.MatchString(bl) {
---
> if bl := blocks["goroutine 2 bt"]; !btGoroutineRe.MatchString(bl) {
178,179d213
< } else if !canBackTrace {
< t.Logf("gdb cannot backtrace for GOARCH=%s, skipped goroutine backtrace test", runtime.GOARCH)
211,213d244
< checkGdbEnvironment(t)
< checkGdbVersion(t)
<
216a248,254
> if runtime.GOARCH == "mips64" {
> testenv.SkipFlaky(t, 18173)
> }
>
> t.Parallel()
> checkGdbEnvironment(t)
> checkGdbVersion(t)
230c268
< cmd := exec.Command("go", "build", "-o", "a.exe")
---
> cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", "a.exe")
265a304,376
>
> const autotmpTypeSource = `
> package main
>
> type astruct struct {
> a, b int
> }
>
> func main() {
> var iface interface{} = map[string]astruct{}
> var iface2 interface{} = []astruct{}
> println(iface, iface2)
> }
> `
>
> // TestGdbAutotmpTypes ensures that types of autotmp variables appear in .debug_info
> // See bug #17830.
> func TestGdbAutotmpTypes(t *testing.T) {
> if runtime.GOARCH == "mips64" {
> testenv.SkipFlaky(t, 18173)
> }
>
> t.Parallel()
> checkGdbEnvironment(t)
> checkGdbVersion(t)
>
> dir, err := ioutil.TempDir("", "go-build")
> if err != nil {
> t.Fatalf("failed to create temp directory: %v", err)
> }
> defer os.RemoveAll(dir)
>
> // Build the source code.
> src := filepath.Join(dir, "main.go")
> err = ioutil.WriteFile(src, []byte(autotmpTypeSource), 0644)
> if err != nil {
> t.Fatalf("failed to create file: %v", err)
> }
> cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags=-N -l", "-o", "a.exe")
> cmd.Dir = dir
> out, err := testEnv(cmd).CombinedOutput()
> if err != nil {
> t.Fatalf("building source %v\n%s", err, out)
> }
>
> // Execute gdb commands.
> args := []string{"-nx", "-batch",
> "-ex", "set startup-with-shell off",
> "-ex", "break main.main",
> "-ex", "run",
> "-ex", "step",
> "-ex", "info types astruct",
> filepath.Join(dir, "a.exe"),
> }
> got, _ := exec.Command("gdb", args...).CombinedOutput()
>
> sgot := string(got)
>
> // Check that the backtrace matches the source code.
> types := []string{
> "struct []main.astruct;",
> "struct bucket<string,main.astruct>;",
> "struct hash<string,main.astruct>;",
> "struct main.astruct;",
> "typedef struct hash<string,main.astruct> * map[string]main.astruct;",
> }
> for _, name := range types {
> if !strings.Contains(sgot, name) {
> t.Errorf("could not find %s in 'info typrs astruct' output", name)
> t.Fatalf("gdb output:\n%v", sgot)
> }
> }
> }
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/aprof.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/aprof.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/callback.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/callback.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/cgo.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/cgo.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/deadlock.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/deadlock.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/dll_windows.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/dll_windows.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/dropm.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/dropm.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/exec.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/exec.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/pprof.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/pprof.go
1c1
< // Copyright 2016 The Go Authors. All rights reserved.
---
> // Copyright 2016 The Go Authors. All rights reserved.
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/raceprof.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/raceprof.go
diff: /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/raceprof.go: No such file or directory
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/racesig.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/racesig.go
diff: /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/racesig.go: No such file or directory
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/threadpanic.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/threadpanic.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/threadpprof.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/threadpprof.go
1c1
< // Copyright 2016 The Go Authors. All rights reserved.
---
> // Copyright 2016 The Go Authors. All rights reserved.
42,52d41
< static void *pprofThread(void* p) {
< time_t start;
<
< (void)p;
< start = time(NULL);
< while (__sync_add_and_fetch(&cpuHogThreadCount, 0) < 2 && time(NULL) - start < 2) {
< cpuHogThread();
< }
< }
<
<
66a56,67
>
> static void* cpuHogDriver(void* arg __attribute__ ((unused))) {
> while (1) {
> cpuHogThread();
> }
> return 0;
> }
>
> void runCPUHogThread(void) {
> pthread_t tid;
> pthread_create(&tid, 0, cpuHogDriver, 0);
> }
81a83
> register("CgoPprofThreadNoTraceback", CgoPprofThreadNoTraceback)
85a88,93
> pprofThread()
> }
>
> func CgoPprofThreadNoTraceback() {
> pprofThread()
> }
86a95
> func pprofThread() {
97a107,108
> C.runCPUHogThread()
>
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/threadprof.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/threadprof.go
4a5,7
> // We only build this file with the tag "threadprof", since it starts
> // a thread running a busy loop at constructor time.
>
5a9
> // +build threadprof
23a28
>
87,88c92,93
< fmt.Println("C signal did not crash as expected\n")
< fmt.Printf("%s\n", out)
---
> fmt.Println("C signal did not crash as expected")
> fmt.Printf("\n%s\n", out)
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/traceback.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/traceback.go
18c18
< static int f3() {
---
> static int f3(void) {
23c23
< static int f2() {
---
> static int f2(void) {
27c27
< static int f1() {
---
> static int f1(void) {
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/tracebackctxt.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/tracebackctxt.go
diff /Users/akutz/.go/1.7.4/src/runtime/testdata/testprogcgo/windows/win.go /Users/akutz/.go/1.8.1/src/runtime/testdata/testprogcgo/windows/win.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_darwin.go /Users/akutz/.go/1.8.1/src/syscall/types_darwin.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_dragonfly.go /Users/akutz/.go/1.8.1/src/syscall/types_dragonfly.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_freebsd.go /Users/akutz/.go/1.8.1/src/syscall/types_freebsd.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_linux.go /Users/akutz/.go/1.8.1/src/syscall/types_linux.go
115c115
< #ifdef __ARM_EABI__
---
> #if defined(__ARM_EABI__) || (defined(__mips__) && _MIPS_SIM == _ABIO32)
diff /Users/akutz/.go/1.7.4/src/syscall/types_netbsd.go /Users/akutz/.go/1.8.1/src/syscall/types_netbsd.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_openbsd.go /Users/akutz/.go/1.8.1/src/syscall/types_openbsd.go
diff /Users/akutz/.go/1.7.4/src/syscall/types_solaris.go /Users/akutz/.go/1.8.1/src/syscall/types_solaris.go
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I believe this changed in https://golang.org/cl/28971, which forces external linking for darwin-arm and darwin-arm64. Before that change, the linker forced external linking for cgo code on those platforms. After that change, the linker forced external linking for all code on those platforms. @crawshaw Do you remember anything about this? |
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/cc @eliasnaur |
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I guess we don't have a Mobile label. @eliasnaur, do you want one? |
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SGTM. |
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I think it is OK that we force external linking here. Those systems are always going to be fussy about the binaries and using the external linker means that we're more likely to get a working binary out. When cross-compiling, this means you have to set $CC during your go build command, or else (as of Go 1.10) set CC_FOR_darwin_arm and CC_FOR_darwin_arm64 during make.bash (see go doc cgo on master). See src/iostest.bash in the main repo for an example of cross-compiling for darwin_arm and darwin_arm64 from macOS. That is working for me, at least for compilation. (I can't run the results because I don't have the rest of the iOS dev env set up.) |
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The Problem
Go 1.7.x can cross-compile binaries for
darwin_armanddarwin_arm64on macOS, but Go 1.8.x cannot.The Project
The test project is a simple "Hello, world" application.
The Files
The Program
$ cat main.go package main import ( "fmt" "runtime" ) func main() { fmt.Printf("%s_%s\n", runtime.GOOS, runtime.GOARCH) }Go 1.7.4
Print the Go environment
Print the Go version
$ $HOME/.go/1.7.4/bin/go version go version go1.7.4 darwin/amd64Build the binary (Works)
Reproduce in one line
The following one-liner can reproduce this test case with a clean Go 1.7.5 environment (example output):
Verify the binary's architecture
Go 1.8.1
Print the Go environment
Print the Go version
$ $HOME/.go/1.8.1/bin/go version go version go1.8.1 darwin/amd64Build the binary (Fails)
Build the binary with
-ldflags '-v'(Fails)Reproduce in one line
The following one-liner can reproduce this test case with a clean Go 1.8.1 environment (example output):
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