[release-branch.go1.23] runtime/cgo: avoid errors from -Wdeclaration-after-statement

CL 652181 accidentally missed this iPhone only code.

For #71961
For #71962

Change-Id: I567f8bb38958907442e69494da330d5199d11f54
Reviewed-on: https://go-review.googlesource.com/c/go/+/653136


Reviewed-by: Michael Pratt <mpratt@google.com>
Commit-Queue: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>

src/runtime/cgo/gcc_darwin_arm64.c

@@ -75,19 +75,27 @@ threadentry(void *v)
 static void
 init_working_dir()
 {
-	CFBundleRef bundle = CFBundleGetMainBundle();
+	CFBundleRef bundle;
+	CFURLRef url_ref;
+	CFStringRef url_str_ref;
+	char buf[MAXPATHLEN];
+	Boolean res;
+	int url_len;
+	char *dir;
+	CFStringRef wd_ref;
+
+	bundle = CFBundleGetMainBundle();
 	if (bundle == NULL) {
 		fprintf(stderr, "runtime/cgo: no main bundle\n");
 		return;
 	}
-	CFURLRef url_ref = CFBundleCopyResourceURL(bundle, CFSTR("Info"), CFSTR("plist"), NULL);
+	url_ref = CFBundleCopyResourceURL(bundle, CFSTR("Info"), CFSTR("plist"), NULL);
 	if (url_ref == NULL) {
 		// No Info.plist found. It can happen on Corellium virtual devices.
 		return;
 	}
-	CFStringRef url_str_ref = CFURLGetString(url_ref);
-	char buf[MAXPATHLEN];
-	Boolean res = CFStringGetCString(url_str_ref, buf, sizeof(buf), kCFStringEncodingUTF8);
+	url_str_ref = CFURLGetString(url_ref);
+	res = CFStringGetCString(url_str_ref, buf, sizeof(buf), kCFStringEncodingUTF8);
 	CFRelease(url_ref);
 	if (!res) {
 		fprintf(stderr, "runtime/cgo: cannot get URL string\n");
@@ -96,13 +104,13 @@ init_working_dir()
 
 	// url is of the form "file:///path/to/Info.plist".
 	// strip it down to the working directory "/path/to".
-	int url_len = strlen(buf);
+	url_len = strlen(buf);
 	if (url_len < sizeof("file://")+sizeof("/Info.plist")) {
 		fprintf(stderr, "runtime/cgo: bad URL: %s\n", buf);
 		return;
 	}
 	buf[url_len-sizeof("/Info.plist")+1] = 0;
-	char *dir = &buf[0] + sizeof("file://")-1;
+	dir = &buf[0] + sizeof("file://")-1;
 
 	if (chdir(dir) != 0) {
 		fprintf(stderr, "runtime/cgo: chdir(%s) failed\n", dir);
@@ -110,7 +118,7 @@ init_working_dir()
 
 	// The test harness in go_ios_exec passes the relative working directory
 	// in the GoExecWrapperWorkingDirectory property of the app bundle.
-	CFStringRef wd_ref = CFBundleGetValueForInfoDictionaryKey(bundle, CFSTR("GoExecWrapperWorkingDirectory"));
+	wd_ref = CFBundleGetValueForInfoDictionaryKey(bundle, CFSTR("GoExecWrapperWorkingDirectory"));
 	if (wd_ref != NULL) {
 		if (!CFStringGetCString(wd_ref, buf, sizeof(buf), kCFStringEncodingUTF8)) {
 			fprintf(stderr, "runtime/cgo: cannot get GoExecWrapperWorkingDirectory string\n");