Add -fuse-line-directive flag to control usage of #line with -E
Currently -fms-extensions controls this behavior, which doesn't make
much sense. It means we can't identify what is and isn't a system header
when compiling our own preprocessed output, because #line doesn't
represent this information.
If someone is feeding Clang's preprocessed output to another compiler,
they can use this flag.
Fixes PR20553.
Reviewers: rsmith
Differential Revision: http://reviews.llvm.org/D5217
llvm-svn: 230587
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index ef76cbf..2098dec 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1826,6 +1826,7 @@
Opts.ShowMacroComments = Args.hasArg(OPT_CC);
Opts.ShowMacros = Args.hasArg(OPT_dM) || Args.hasArg(OPT_dD);
Opts.RewriteIncludes = Args.hasArg(OPT_frewrite_includes);
+ Opts.UseLineDirectives = Args.hasArg(OPT_fuse_line_directives);
}
static void ParseTargetArgs(TargetOptions &Opts, ArgList &Args) {