TestCpp-CrossCompile-LinuxToWin64

A repo to test how to cross compile a dummy C++ project using Github Actions, mingw32, and conan.

The workflow file build.yml will show the steps necessary to make it work.

But the bottom line is that on Ubuntu (tested on ubuntu-20.4), you need to install the dependencies you need (conan and mingw-w64)

pip install conan
sudo apt-get install mingw-w64

Then build with the toolchain file mingw-w64-x86_64.cmake I created. This toolchain file also loads a specific conan cross-compiling profile: conan_linux_to_win64. You may need to tweak that conan profile to provide the specific version of the mingw-gcc you have (9.3 in my case).

mkdir build && cd build
cmake -G Ninja -DCMAKE_TOOLCHAIN_FILE=../cmake/mingw-w64-x86_64.cmake ../
ninja

If you want to test a few things locally while on ubuntu:

# Execute via wine (sudo apt install wine)
$ wine Products/main.exe
INFO: Hello World

# See the dlls it links to
$ objdump --private-headers Products/main.exe | /bin/grep "DLL Name:"
	DLL Name: KERNEL32.dll
	DLL Name: msvcrt.dll
	DLL Name: libtestlib.dll