$OpenBSD: patch-build_main_mk,v 1.3 2019/10/20 22:07:03 bentley Exp $
Index: build/main.mk
--- build/main.mk.orig
+++ build/main.mk
@@ -342,7 +342,7 @@ LINK_FLAGS+=$(TARGET_FLAGS)
 CXX?=g++
 WINDRES?=windres
 DEPEND_FLAGS:=
-ifneq ($(filter %clang++,$(CXX))$(filter clang++%,$(CXX)),)
+ifneq ($(filter %clang++,$(CXX))$(filter clang++%,$(CXX))$(filter c++,$(CXX)),)
   # Enable C++14 (supported since clang-3.5)
   COMPILE_FLAGS+=-std=c++14
   # Clang does support -Wunused-macros, but it triggers on SDL's headers,
@@ -394,6 +394,8 @@ else
   else
     $(warning Unsupported compiler: $(CXX), please update Makefile)
   endif
+  # Enable C++11
+  COMPILE_FLAGS+=-std=c++11
 endif
 endif
 
