Crosscompile for Windows on Ubuntu MinGW CMake

In this article, I will describe the process of building libraries and applications for Windows using the MinGW32 toolchain on Ubuntu.
Install wine, mingw:


sudo apt-get install wine mingw-w64

After that, you can already build C / C ++ applications for Windows:


# C
i686-w64-mingw32-gcc helloWorld.c -o helloWorld32.exe      # 32-bit
x86_64-w64-mingw32-gcc helloWorld.c -o helloWorld64.exe    # 64-bit
 
# C++
i686-w64-mingw32-g++ helloWorld.cc -o helloWorld32.exe     # 32-bit
x86_64-w64-mingw32-g++ helloWorld.cc -o helloWorld64.exe   # 64-bit

Collected exe can be checked with wine.

Next, consider the changes to the CMake assembly, the CMakeLists.txt file, add MinGW specific things to the assembly file:


if (MINGW32)
set(CMAKE_SYSTEM_NAME Windows)
SET(CMAKE_C_COMPILER i686-w64-mingw32-gcc)
SET(CMAKE_CXX_COMPILER i686-w64-mingw32-g++)
SET(CMAKE_RC_COMPILER i686-w64-mingw32-windres)
set(CMAKE_RANLIB i686-w64-mingw32-ranlib)
endif()

elseif (MINGW32)
add_library(FlameSteelEngineGameToolkit.dll SHARED ${SOURCE_FILES})
else()

// link with all dependencies
if (MINGW32)
target_link_libraries(
                        FlameSteelEngineGameToolkit.dll 
                        -static-libgcc
                        -static-libstdc++
                        SDL2 
                        SDL2_mixer 
                        /home/demensdeum/Sources/cube-art-project-bootstrap/FlameSteelFramework/FlameSteelCore/FlameSteelCore.dll
                        /home/demensdeum/Sources/cube-art-project-bootstrap/FlameSteelFramework/FlameSteelBattleHorn/FlameSteelBattleHorn.dll
                        /home/demensdeum/Sources/cube-art-project-bootstrap/FlameSteelFramework/FlameSteelCommonTraits/FlameSteelCommonTraits.dll)

set_target_properties(FlameSteelEngineGameToolkit.dll PROPERTIES
        PREFIX ""
        SUFFIX ""
        LINK_FLAGS "-Wl,--add-stdcall-alias"
        POSITION_INDEPENDENT_CODE 0 # this is to avoid MinGW warning; 
        # MinGW generates position-independent-code for DLL by default
)
else()

Build:


cmake -DMINGW32=1 .
make

The output will be dll or exe, depending on your build. You can look at the working example in the repository of the new Cube-Art-Project and its libraries:
https://gitlab.com/demensdeum/cube-art-project
https://gitlab.com/demensdeum/FlameSteelEngineGameToolkitFSGL
https://gitlab.com/demensdeum/cube-art-project-bootstrap

References
https://arrayfire.com/cross-compile-to-windows-from-linux/

0