[llvm] [clang] [openmp] [OpenMP] Introduce support for OMPX extensions and taskgraph frontend (PR #66919)

[Jose Manuel Monsalve Diaz via cfe-commits]

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@@ -1176,6 +1176,8 @@ def warn_pragma_ms_fenv_access : Warning<
 def warn_pragma_extra_tokens_at_eol : Warning<
   "extra tokens at end of '#pragma %0' - ignored">,
   InGroup<IgnoredPragmas>;
+def err_omp_extension_without_ompx : Error<
+  "Using extension directive '%0' in #pragma omp instead of #pragma ompx">;
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josemonsalve2 wrote:

For some reason this was marked as resolved. @Munesanz this change is missing.

https://github.com/llvm/llvm-project/pull/66919