[clang][cli] Stop creating '-Wno-stdlibcxx-not-found' in cc1

This patch stops creating the '-Wno-stdlibcxx-not-found' argument in `CompilerInvocation::CreateFromArgs`.

The code was added in 2e7ab55e657f (a follow-up to D48297). However, D61963 removes relevant tests and starts explicitly passing '-Wno-stdlibcxx-not-found' to the driver. I think it's fair to assume this is a dead code.

Reviewed By: dexonsmith

Differential Revision: https://reviews.llvm.org/D97042

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index a49c978..45fb4f6 100644 (file)
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4588,12 +4588,6 @@ bool CompilerInvocation::CreateFromArgs(CompilerInvocation &Res,
                              Res.getPreprocessorOpts().Includes, Diags);
     if (Res.getFrontendOpts().ProgramAction == frontend::RewriteObjC)
       LangOpts.ObjCExceptions = 1;
-    if (T.isOSDarwin() && DashX.isPreprocessed()) {
-      // Supress the darwin-specific 'stdlibcxx-not-found' diagnostic for
-      // preprocessed input as we don't expect it to be used with -std=libc++
-      // anyway.
-      Res.getDiagnosticOpts().Warnings.push_back("no-stdlibcxx-not-found");
-    }
   }
 
   if (LangOpts.CUDA) {