From fae80ee2c347b87a65b80a3c8caa598c40680cc0 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 31 Mar 2016 08:50:48 -0400
Subject: [PATCH] Check*CompilerFlag: Add another pattern for Clang (#16038)

Match a warning pattern produced by `clang-cl`.

Suggested-by: Reid Kleckner <rnk@google.com>
---
 Modules/CMakeCheckCompilerFlagCommonPatterns.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
index 07d8b1e3f..a350a84dd 100644
--- a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
+++ b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
@@ -24,6 +24,7 @@ macro (CHECK_COMPILER_FLAG_COMMON_PATTERNS _VAR)
      FAIL_REGEX "[Uu]nrecogni[sz]ed .*option"               # GNU, NAG
      FAIL_REGEX "unknown .*option"                          # Clang
      FAIL_REGEX "optimization flag .* not supported"        # Clang
+     FAIL_REGEX "unknown argument ignored"                  # Clang (cl)
      FAIL_REGEX "ignoring unknown option"                   # MSVC, Intel
      FAIL_REGEX "warning D9002"                             # MSVC, any lang
      FAIL_REGEX "option.*not supported"                     # Intel