[clang] [clang][modules] Print library module manifest path. (PR #76451)

[Ben Boeckel via cfe-commits]

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@@ -2164,6 +2164,12 @@ bool Driver::HandleImmediateArgs(const Compilation &C) {
     return false;
   }
 
+  if (C.getArgs().hasArg(options::OPT_print_library_module_manifest_path)) {
+    llvm::outs() << "module: ="
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mathstuf wrote:

I'd like there to be some distinction between "modules not present because Clang was built without them" and "modules not present but expected to be there" (maybe distro packagers split things and the modules package is missing?).

https://github.com/llvm/llvm-project/pull/76451