[PATCH] D25989: Do not print include_next/pragma once warnings when input is a header.

[Erik Verbruggen via cfe-commits]

erikjv created this revision.
erikjv added a reviewer: bkramer.
erikjv added a subscriber: cfe-commits.

r276653 suppressed the pragma once warning when generating a PCH file.
This patch extends that to any main file for which clang is told (with
the -x option) that it's a header file. It will also suppress the
warning "#include_next in primary source file".


https://reviews.llvm.org/D25989

Files:
  include/clang/Basic/LangOptions.h
  lib/Basic/LangOptions.cpp
  lib/Frontend/CompilerInvocation.cpp
  lib/Lex/PPDirectives.cpp
  lib/Lex/PPMacroExpansion.cpp
  lib/Lex/Pragma.cpp
  test/Preprocessor/header_is_main_file.c

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