From 4b3fae11b7518b988ee9bdb1d10ddad6ad981fab Mon Sep 17 00:00:00 2001
From: Augustin Degomme <adegomme@users.noreply.github.com>
Date: Sat, 30 Jul 2022 20:18:01 +0200
Subject: [PATCH] fix build for clang <15

---
 tools/cmake/Flags.cmake | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/cmake/Flags.cmake b/tools/cmake/Flags.cmake
index 304cd06578..9c4e60b7a1 100644
--- a/tools/cmake/Flags.cmake
+++ b/tools/cmake/Flags.cmake
@@ -43,8 +43,11 @@ if(enable_compile_warnings)
   if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
     # don't care about class that become struct, avoid issue of empty C structs
     # size (coming from libunwind.h)
+    set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat")
     # also ignore deprecated builtins (seen with clang 15 + boost 1.79)
-    set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-mismatched-tags -Wno-extern-c-compat -Wno-deprecated-builtins")
+    if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "15.0")
+      set(warnCXXFLAGS "${warnCXXFLAGS} -Wno-deprecated-builtins")
+    endif()
   endif()
 
   # the one specific to C but refused by C++
-- 
2.20.1