TMP: Debug CI failure

go/tools/builders/cgo2.go

@@ -196,6 +196,7 @@ func cgo2(goenv *env, goSrcs, cgoSrcs, cSrcs, cxxSrcs, objcSrcs, objcxxSrcs, sSr
 	mainBin := filepath.Join(workDir, "_cgo_.o") // .o is a lie; it's an executable
 	args = append([]string{cc, "-o", mainBin, mainObj}, cObjs...)
 	args = append(args, combinedLdFlags...)
+	println(strings.Join(args, " "))
 	if err := goenv.runCommand(args); err != nil {
 		// If linking the binary for cgo fails, this is usually because the
 		// object files reference external symbols that can't be resolved yet.
@@ -204,17 +205,21 @@ func cgo2(goenv *env, goSrcs, cgoSrcs, cSrcs, cxxSrcs, objcSrcs, objcxxSrcs, sSr
 		// symbols - the real link that happens at the end will fail if they
 		// rightfully can't be resolved.
 		var allowUnresolvedSymbolsLdFlags []string
+		println(os.Getenv("GOOS"))
 		switch os.Getenv("GOOS") {
 		case "windows":
 			// MinGW's linker doesn't seem to support --unresolved-symbols
 			// and MSVC isn't supported at all.
 			return "", nil, nil, err
 		case "darwin":
 		case "ios":
+			println("darwin case")
 			allowUnresolvedSymbolsLdFlags = []string{"-Wl,-undefined,dynamic_lookup"}
 		default:
+			println("linux case")
 			allowUnresolvedSymbolsLdFlags = []string{"-Wl,--unresolved-symbols=ignore-all"}
 		}
+		println(strings.Join(append(args, allowUnresolvedSymbolsLdFlags...), " "))
 		if err2 := goenv.runCommand(append(args, allowUnresolvedSymbolsLdFlags...)); err2 != nil {
 			// Return the original error if we can't link the binary with the
 			// additional linker flags as they may simply be incorrect for the