$OpenBSD: patch-cube_cube_cpp,v 1.3 2020/12/27 15:58:43 thfr Exp $

Index: cube/cube.cpp
--- cube/cube.cpp.orig
+++ cube/cube.cpp
@@ -3121,7 +3121,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPre
     return (int)msg.wParam;
 }
 
-#elif __linux__
+#elif defined(__linux__) || defined(__unix__)
 
 int main(int argc, char **argv) {
     Demo demo;
