cmd/dist: add curiously missing GOOS/GOARCH combinations

The cmd/dist cgo_test enumerates a large number of platforms in
various special cases. Some combinations are suspiciously absent. This
CL completes the combinations.

I've confirmed using trybots that the newly-enabled tests pass on
android/* (this is not surprising because the gohostos is never
"android" anyway), windows/arm64, linux/ppc64 (no cgo), linux/loong64
(except for one test, filed #56623), linux/mips*, netbsd/arm (except
for one test, filed #56629), and netbsd/arm64. The windows/arm builder
is out to lunch, so I'm assuming that works. Since netbsd/arm and
arm64 mostly passed these tests, I've also enabled them on netbsd/386
and netbsd/amd64, where they seem to work fine as well.

Preparation for #37486.

Change-Id: I04c3348e4f422d74d51e714647ca3db379e6e919
Reviewed-on: https://go-review.googlesource.com/c/go/+/448016
Run-TryBot: Austin Clements <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>
Auto-Submit: Austin Clements <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Author: aclements

src/cmd/dist/test.go

@@ -1183,7 +1183,7 @@ func (t *tester) cgoTest(dt *distTest) error {
 	pair := gohostos + "-" + goarch
 	switch pair {
 	case "darwin-amd64", "darwin-arm64",
-		"windows-386", "windows-amd64":
+		"windows-386", "windows-amd64", "windows-arm", "windows-arm64":
 		// test linkmode=external, but __thread not supported, so skip testtls.
 		if !t.extLink() {
 			break
@@ -1201,11 +1201,11 @@ func (t *tester) cgoTest(dt *distTest) error {
 		}
 
 	case "aix-ppc64",
-		"android-arm", "android-arm64",
+		"android-386", "android-amd64", "android-arm", "android-arm64",
 		"dragonfly-amd64",
 		"freebsd-386", "freebsd-amd64", "freebsd-arm", "freebsd-riscv64",
-		"linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le", "linux-riscv64", "linux-s390x",
-		"netbsd-386", "netbsd-amd64",
+		"linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-loong64", "linux-mips", "linux-mipsle", "linux-mips64", "linux-mips64le", "linux-ppc64", "linux-ppc64le", "linux-riscv64", "linux-s390x",
+		"netbsd-386", "netbsd-amd64", "netbsd-arm", "netbsd-arm64",
 		"openbsd-386", "openbsd-amd64", "openbsd-arm", "openbsd-arm64", "openbsd-mips64":
 
 		cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-ldflags=-linkmode=external", ".")
@@ -1217,7 +1217,7 @@ func (t *tester) cgoTest(dt *distTest) error {
 		t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-ldflags", "-linkmode=external", ".")
 
 		switch pair {
-		case "aix-ppc64", "netbsd-386", "netbsd-amd64":
+		case "aix-ppc64":
 			// no static linking
 		case "freebsd-arm":
 			// -fPIC compiled tls code will use __tls_get_addr instead
@@ -1232,7 +1232,8 @@ func (t *tester) cgoTest(dt *distTest) error {
 			if err := cmd.Run(); err != nil {
 				fmt.Println("No support for static linking found (lacks libc.a?), skip cgo static linking test.")
 			} else {
-				if goos != "android" {
+				if goos != "android" && pair != "netbsd-arm" {
+					// TODO(#56629): Why does this fail on netbsd-arm?
 					t.addCmd(dt, "misc/cgo/testtls", t.goTest(), "-ldflags", `-linkmode=external -extldflags "-static -pthread"`, ".")
 				}
 				t.addCmd(dt, "misc/cgo/nocgo", t.goTest(), ".")
@@ -1243,8 +1244,11 @@ func (t *tester) cgoTest(dt *distTest) error {
 					// -static in CGO_LDFLAGS triggers a different code path
 					// than -static in -extldflags, so test both.
 					// See issue #16651.
-					cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-tags=static", ".")
-					setEnv(cmd, "CGO_LDFLAGS", "-static -pthread")
+					if goarch != "loong64" {
+						// TODO(#56623): Why does this fail on loong64?
+						cmd := t.addCmd(dt, "misc/cgo/test", t.goTest(), "-tags=static", ".")
+						setEnv(cmd, "CGO_LDFLAGS", "-static -pthread")
+					}
 				}
 			}