$NetBSD: patch-CMakeLists.txt,v 1.2 2023/01/22 21:24:37 ryoon Exp $

--- CMakeLists.txt.orig	2023-01-22 17:20:12.516051931 +0000
+++ CMakeLists.txt
@@ -998,6 +998,7 @@ set(EXETYPE "")
 
 # C/C++ flags
 set(PLATFORM_CFLAGS)
+set(PLATFORM_CXXFLAGS)
 
 # these are added to later on.
 set(C_WARNINGS)
@@ -1721,7 +1722,7 @@ endif()
 
 if(UNIX AND NOT APPLE)
   if(NOT WITH_CXX11_ABI)
-    string(APPEND PLATFORM_CFLAGS " -D_GLIBCXX_USE_CXX11_ABI=0")
+    string(APPEND PLATFORM_CXXFLAGS " -D_GLIBCXX_USE_CXX11_ABI=0")
   endif()
 endif()
 
@@ -1766,7 +1767,7 @@ endif()
 # Include warnings first, so its possible to disable them with user defined flags
 # eg: -Wno-uninitialized
 set(CMAKE_C_FLAGS "${C_WARNINGS} ${CMAKE_C_FLAGS} ${PLATFORM_CFLAGS}")
-set(CMAKE_CXX_FLAGS "${CXX_WARNINGS} ${CMAKE_CXX_FLAGS} ${PLATFORM_CFLAGS}")
+set(CMAKE_CXX_FLAGS "${CXX_WARNINGS} ${CMAKE_CXX_FLAGS} ${PLATFORM_CFLAGS} ${PLATFORM_CXXFLAGS}")
 
 # defined above, platform specific but shared names
 mark_as_advanced(