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

[Saleem Abdulrasool via cfe-commits]

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@@ -210,7 +212,10 @@ static const EHPersonality &getObjCXXPersonality(const TargetInfo &Target,
     return getObjCPersonality(Target, L);
 
   case ObjCRuntime::GNUstep:
-    return EHPersonality::GNU_ObjCXX;
+    if (Target.getTriple().isOSCygMing())
+      return EHPersonality::GNU_CPlusPlus_SEH;
+    else
+      return EHPersonality::GNU_ObjCXX;
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compnerd wrote:

This might be nicer as a ternary return.

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