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Add extra check in case someone tries to unbundle Lua
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@ -673,6 +673,22 @@ endif()
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include(CheckCSourceCompiles)
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if(NOT USE_LUAJIT)
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set(CMAKE_REQUIRED_INCLUDES ${LUA_INCLUDE_DIR})
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unset(HAVE_ATCCALL CACHE)
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# Note: we need to check the function without having the library
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# available for linking, so check_symbol_exists won't work.
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check_c_source_compiles("#include <lua.h>\nint main(){return sizeof(lua_atccall);}" HAVE_ATCCALL)
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if(NOT HAVE_ATCCALL)
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string(CONCAT explanation_msg
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"It looks like you're trying to build Minetest using a system-wide "
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"Lua installation. This is no longer supported because PUC Lua "
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"cannot interoperate with C++ correctly. Read src/unittest/test_lua.cpp "
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" for technical details.")
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message(FATAL_ERROR ${explanation_msg})
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endif()
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endif()
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if(MSVC)
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# Visual Studio
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /D WIN32_LEAN_AND_MEAN")
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