[clang-cl] Ignore /Zc:ternary, clang behaves this way already

Addresses part of PR33237 git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@304303 91177308-0d34-0410-b5e6-96231b3b80d8
lijiansong · May 31, 2017 · f9df99d · f9df99d
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diff --git a/include/clang/Driver/CLCompatOptions.td b/include/clang/Driver/CLCompatOptions.td
@@ -324,6 +324,7 @@ def _SLASH_Zc_forScope : CLIgnoredFlag<"Zc:forScope">;
 def _SLASH_Zc_inline : CLIgnoredFlag<"Zc:inline">;
 def _SLASH_Zc_rvalueCast : CLIgnoredFlag<"Zc:rvalueCast">;
 def _SLASH_Zc_wchar_t : CLIgnoredFlag<"Zc:wchar_t">;
+def _SLASH_Zc_ternary : CLIgnoredFlag<"Zc:ternary">;
 def _SLASH_Zm : CLIgnoredJoined<"Zm">;
 def _SLASH_Zo : CLIgnoredFlag<"Zo">;
 def _SLASH_Zo_ : CLIgnoredFlag<"Zo-">;

diff --git a/test/Driver/cl-zc.cpp b/test/Driver/cl-zc.cpp
@@ -53,6 +53,11 @@
 // RUN: %clang_cl /c -### /Zc:inline- -- %s 2>&1 | FileCheck -check-prefix=INLINE-OFF %s
 // INLINE-OFF: argument unused during compilation
 
+// RUN: %clang_cl /c -### /Zc:ternary -- %s 2>&1 | FileCheck -check-prefix=TERNARY-ON %s
+// TERNARY-ON-NOT: argument unused during compilation
+// RUN: %clang_cl /c -### /Zc:ternary- -- %s 2>&1 | FileCheck -check-prefix=TERNARY-OFF %s
+// TERNARY-OFF: argument unused during compilation
+
 
 // These never warn, but don't have an effect yet.