Add driver flags -ftrigraphs, -fno-trigraphs.
-trigraphs is now an alias for -ftrigraphs. -fno-trigraphs makes it possible
to explicitly disable trigraphs, which couldn't be done before.
clang -std=c++11 -fno-trigraphs
now builds without GNU extensions, but with trigraphs disabled. Previously,
trigraphs were only disabled in GNU modes or with -std=c++1z.
Make the new -f flags the cc1 interface too. This requires changing -trigraphs
to -ftrigraphs in a few cc1 tests.
Related to PR21974.
llvm-svn: 224790
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index f44a4fb..8d484a5 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1440,8 +1440,8 @@
// is specified, or -std is set to a conforming mode.
// Trigraphs are disabled by default in c++1z onwards.
Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
- if (Args.hasArg(OPT_trigraphs))
- Opts.Trigraphs = 1;
+ Opts.Trigraphs =
+ Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
OPT_fno_dollars_in_identifiers,