[clang] Objective C: use C++ exceptions on MinGW+GNUstep (PR #77255)

[David Chisnall via cfe-commits]

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@@ -2210,7 +2219,12 @@ CGObjCGNU::CGObjCGNU(CodeGenModule &cgm, unsigned 
runtimeABIVersion,
 
   // void objc_exception_throw(id);
   ExceptionThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy);
-  ExceptionReThrowFn.init(&CGM, "objc_exception_throw", VoidTy, IdTy);
+  if ((CGM.getTarget().getTriple().isOSCygMing() &&
+       isRuntime(ObjCRuntime::GNUstep, 2))) {
+    ExceptionReThrowFn.init(&CGM, "objc_exception_rethrow", VoidTy, IdTy);
+  } else {
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davidchisnall wrote:

It looks as if both branches of the if and else here do the same thing?

https://github.com/llvm/llvm-project/pull/77255
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