Accept and ignore the -fextended-identifiers option.
This was GCC's option to turn on UCN support, which we always have on now
in C99 and C++ modes.
Additionally, mark the -fno-extended-identifiers option as unsupported,
since we don't support disabling UCNs in C99 and C++ modes.
PR11538
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174530 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 1e56e7f..35ea803 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -376,6 +376,10 @@
def fexceptions : Flag<["-"], "fexceptions">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Enable support for exception handling">;
def fextdirs_EQ : Joined<["-"], "fextdirs=">, Group<f_Group>;
+def fextended_identifiers : Flag<["-"], "fextended-identifiers">,
+ Group<clang_ignored_f_Group>;
+def fno_extended_identifiers : Flag<["-"], "fno-extended-identifiers">,
+ Group<f_Group>, Flags<[Unsupported]>;
def fhosted : Flag<["-"], "fhosted">, Group<f_Group>;
def ffast_math : Flag<["-"], "ffast-math">, Group<f_Group>, Flags<[CC1Option]>,
HelpText<"Enable the *frontend*'s 'fast-math' mode. This has no effect on "
diff --git a/test/Driver/clang_f_opts.c b/test/Driver/clang_f_opts.c
index 95204f2..1bd2e14 100644
--- a/test/Driver/clang_f_opts.c
+++ b/test/Driver/clang_f_opts.c
@@ -57,3 +57,9 @@
// RUN: %clang -### -S -ftree-slp-vectorize -fno-slp-vectorize %s 2>&1 | FileCheck -check-prefix=CHECK-NO-SLP-VECTORIZE %s
// CHECK-SLP-VECTORIZE: "-vectorize"
// CHECK-NO-SLP-VECTORIZE-NOT: "-vectorize"
+
+// RUN: %clang -### -S -fextended-identifiers %s 2>&1 | FileCheck -check-prefix=CHECK-EXTENDED-IDENTIFIERS %s
+// RUN: %clang -### -S -fno-extended-identifiers %s 2>&1 | FileCheck -check-prefix=CHECK-NO-EXTENDED-IDENTIFIERS %s
+// CHECK-EXTENDED-IDENTIFIERS: "-cc1"
+// CHECK-EXTENDED-IDENTIFIERS-NOT: "-fextended-identifiers"
+// CHECK-NO-EXTENDED-IDENTIFIERS: error: unsupported option '-fno-extended-identifiers'
