From fc83fd1fc83353988fc8fb1f21152c8658573936 Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Wed, 22 Sep 2021 14:09:07 +0200
Subject: [PATCH] port to MSYS2/clang: suppress 'undefined-var-template'
 warnings

---
 src/Mod/Mesh/App/CMakeLists.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Mod/Mesh/App/CMakeLists.txt b/src/Mod/Mesh/App/CMakeLists.txt
index 187b2115de..2d661aea12 100644
--- a/src/Mod/Mesh/App/CMakeLists.txt
+++ b/src/Mod/Mesh/App/CMakeLists.txt
@@ -372,6 +372,15 @@ SET(Mesh_SRCS
     Segment.h
 )
 
+# Suppress -Wundefined-var-template
+if (MINGW AND CMAKE_COMPILER_IS_CLANGXX)
+    unset(_flag_found CACHE)
+    check_cxx_compiler_flag("-Wno-undefined-var-template" _flag_found)
+    if (_flag_found)
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-undefined-var-template")
+    endif()
+endif()
+
 if(FREECAD_USE_PCH)
     add_definitions(-D_PreComp_)
     GET_MSVC_PRECOMPILED_SOURCE("PreCompiled.cpp" PCH_SRCS ${Core_SRCS} ${Mesh_SRCS})