Add clang-cl alias to allow users to disable c4005

If we ever want three or more aliases, at that point we should put MSVC
warning ids in DiagnosticGroups.td.  We can use that to support #pragma
warning.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@205598 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/clang/Driver/CLCompatOptions.td b/include/clang/Driver/CLCompatOptions.td
index d33e6b67f0d94380172542727c8a7b6cfecf6a13..2bfc78ed1b8e96af25c10a6e97c557750749fb00 100644 (file)
--- a/include/clang/Driver/CLCompatOptions.td
+++ b/include/clang/Driver/CLCompatOptions.td
@@ -121,6 +121,8 @@ def _SLASH_WX : CLFlag<"WX">, HelpText<"Treat warnings as errors">,
 def _SLASH_WX_ : CLFlag<"WX-">, HelpText<"Do not treat warnings as errors">,
   Alias<W_Joined>, AliasArgs<["no-error"]>;
 def _SLASH_w_flag : CLFlag<"w">, HelpText<"Disable all warnings">, Alias<w>;
+def _SLASH_wd4005 : CLFlag<"wd4005">, Alias<W_Joined>,
+  AliasArgs<["no-macro-redefined"]>;
 def _SLASH_vd : CLJoined<"vd">, HelpText<"Control vtordisp placement">,
   Alias<vtordisp_mode_EQ>;
 def _SLASH_Z7 : CLFlag<"Z7">, Alias<gline_tables_only>;

diff --git a/test/Driver/cl-options.c b/test/Driver/cl-options.c
index a66613117370ae4dc92f1388ccf0b42c2bb87078..84fa2699eef9564c7b75e9112abbd513a3b31e6e 100644 (file)
--- a/test/Driver/cl-options.c
+++ b/test/Driver/cl-options.c
@@ -129,6 +129,10 @@
 // WJoined: "-cc1"
 // WJoined: "-Wunused-pragmas"
 
+// For some warning ids, we can map from MSVC warning to Clang warning.
+// RUN: %clang_cl -wd4005 -### -- %s 2>&1 | FileCheck -check-prefix=wd4005 %s
+// wd4005: "-cc1"
+// wd4005: "-Wno-macro-redefined"
 
 // Ignored options. Check that we don't get "unused during compilation" errors.
 // (/Zs is for syntax-only)