[clang] [clang][PowerPC] Add flag to enable compatibility with GNU for complex arguments (PR #77732)

[zhijian lin via cfe-commits]

================
@@ -5585,6 +5585,15 @@ void Clang::ConstructJob(Compilation &C, const JobAction 
&JA,
     }
   }
 
+  if (Arg *A = Args.getLastArg(options::OPT_fcomplex_ppc_gnu_abi)) {
+    if (!TC.getTriple().isPPC32() || !TC.getTriple().isOSBinFormatELF()) {
+      D.Diag(diag::err_drv_unsupported_opt_for_target)
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diggerlin wrote:

I think we need a test case for this.

https://github.com/llvm/llvm-project/pull/77732
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