[Compatibility50] Silence warning about taking the address of objc_setHook_getClass.

mikeash · mikeash · commit e4e2b23a714d · 2025-02-11T17:11:12.000-05:00
Add a &amp; so the compiler doesn't think it always evaluates to true.

rdar://144465537
diff --git a/stdlib/toolchain/Compatibility50/Overrides.cpp b/stdlib/toolchain/Compatibility50/Overrides.cpp
@@ -112,7 +112,7 @@ static void installGetClassHook_untrusted() {
 
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wunguarded-availability"
-  if (objc_setHook_getClass) {
+  if (&objc_setHook_getClass) {
     objc_setHook_getClass(getObjCClassByMangledName_untrusted,
                           &OldGetClassHook);
   }

Original file line number	Diff line number	Diff line change
`@@ -112,7 +112,7 @@ static void installGetClassHook_untrusted() {`
`112`	`112`
`113`	`113`	`#pragma clang diagnostic push`
`114`	`114`	`#pragma clang diagnostic ignored "-Wunguarded-availability"`
`115`		`- if (objc_setHook_getClass) {`
	`115`	`+ if (&objc_setHook_getClass) {`
`116`	`116`	`objc_setHook_getClass(getObjCClassByMangledName_untrusted,`
`117`	`117`	`&OldGetClassHook);`
`118`	`118`	`}`