clang-cl: List valid values for /std: in /? output

Differential Revision: https://reviews.llvm.org/D61029

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@359107 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Driver/CLCompatOptions.td b/include/clang/Driver/CLCompatOptions.td
index 6fb91fd63634707a80c16700256c4462e1bdd377..fb02d856a253c868e6faf7eb677f72d7595b8f65 100644 (file)
--- a/include/clang/Driver/CLCompatOptions.td
+++ b/include/clang/Driver/CLCompatOptions.td
@@ -166,7 +166,7 @@ def _SLASH_source_charset : CLCompileJoined<"source-charset:">,
 def _SLASH_execution_charset : CLCompileJoined<"execution-charset:">,
   HelpText<"Runtime encoding, supports only UTF-8">, Alias<fexec_charset_EQ>;
 def _SLASH_std : CLCompileJoined<"std:">,
-  HelpText<"Language standard to compile for">;
+  HelpText<"Language standard to compile for (c++14,c++17,c++latest)">;
 def _SLASH_U : CLJoinedOrSeparate<"U">, HelpText<"Undefine macro">,
   MetaVarName<"<macro>">, Alias<U>;
 def _SLASH_validate_charset : CLFlag<"validate-charset">,