From 680ebebc1a8ad9d4507fce1b353b1fc32aa4f4f3 Mon Sep 17 00:00:00 2001
From: Dan Kegel <dank@kegel.com>
Date: Wed, 22 Apr 2015 10:58:08 -0400
Subject: [PATCH] Check*CompilerFlag: Add another pattern for Clang (#15526)

Match 'optimization flag ... not supported' messages.
---
 Modules/CMakeCheckCompilerFlagCommonPatterns.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
index 3141d60b2..07d8b1e3f 100644
--- a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
+++ b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
@@ -23,6 +23,7 @@ macro (CHECK_COMPILER_FLAG_COMMON_PATTERNS _VAR)
    set(${_VAR}
      FAIL_REGEX "[Uu]nrecogni[sz]ed .*option"               # GNU, NAG
      FAIL_REGEX "unknown .*option"                          # Clang
+     FAIL_REGEX "optimization flag .* not supported"        # Clang
      FAIL_REGEX "ignoring unknown option"                   # MSVC, Intel
      FAIL_REGEX "warning D9002"                             # MSVC, any lang
      FAIL_REGEX "option.*not supported"                     # Intel