From f745e0497ee71d35fd1b3524b1636a72da76c266 Mon Sep 17 00:00:00 2001
From: Craig Scott <craig.scott@crascit.com>
Date: Mon, 3 Jan 2022 09:35:16 +1100
Subject: CheckCompilerFlags: Catch linker warning about ignored flags

Example warning from arm64 macOS that this will now catch:

ld: warning: -no_pie ignored for arm64

Fixes: #22961
---
 Modules/CMakeCheckCompilerFlagCommonPatterns.cmake | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
index bda1d71..8f59acd 100644
--- a/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
+++ b/Modules/CMakeCheckCompilerFlagCommonPatterns.cmake
@@ -13,6 +13,7 @@ macro (CHECK_COMPILER_FLAG_COMMON_PATTERNS _VAR)
     FAIL_REGEX "unknown .*option"                          # Clang
     FAIL_REGEX "optimization flag .* not supported"        # Clang
     FAIL_REGEX "unknown argument ignored"                  # Clang (cl)
+    FAIL_REGEX "warning: .* ignored"                       # Clang (linker)
     FAIL_REGEX "ignoring unknown option"                   # MSVC, Intel
     FAIL_REGEX "warning D9002"                             # MSVC, any lang
     FAIL_REGEX "option.*not supported"                     # Intel
-- 
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