From 4ca5a815f2dfe9e1116cc2ccd5ddb56d0d00d12e Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Thu, 7 Mar 2019 14:55:54 -0500
Subject: [PATCH] C++ feature checks: Match warnings more strictly

Require the word "warning" to appear at the start of a line, after
whitespace, or after a `:`.  This is the same that CTest launchers use
to match warnings.  It avoids matching "warning" inside file paths.

Fixes: #19019
---
 Source/Checks/cm_cxx_features.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/Source/Checks/cm_cxx_features.cmake
+++ b/Source/Checks/cm_cxx_features.cmake
@@ -25,7 +25,7 @@ function(cm_check_cxx_feature name)
     # Filter out xcodebuild warnings.
     string(REGEX REPLACE "[^\n]* xcodebuild\\[[0-9]*:[0-9]*\\] warning: [^\n]*" "" check_output "${check_output}")
     # If using the feature causes warnings, treat it as broken/unavailable.
-    if(check_output MATCHES "[Ww]arning")
+    if(check_output MATCHES "(^|[ :])[Ww][Aa][Rr][Nn][Ii][Nn][Gg]")
       set(CMake_HAVE_CXX_${FEATURE} OFF CACHE INTERNAL "TRY_COMPILE" FORCE)
     endif()
     if(CMake_HAVE_CXX_${FEATURE})
