Build in Linux

[clort81]

Thanks for making this! Love the wxwidgets simplicity.

Changes will be needed for non-slave software platforms though.

make[1]: *** [CMakeFiles/Makefile2:82: CMakeFiles/sidplaywx.dir/all] Error 2

inspecting ./build/CMakeFiles/sidplaywx.dir/build.make

sidplaywx: CMakeFiles/sidplaywx.dir/build.make
sidplaywx: C:/msys64/mingw64/lib/libsidplayfp.a
sidplaywx: C:/msys64/mingw64/lib/libstilview.a
sidplaywx: C:/Program\ Files/portaudio/lib/libportaudio.a                                                               
sidplaywx: C:/wxWidgets/gcc_lib/wxmsw315u_propgrid_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxmsw315u_core_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_xml_gcc1020_x64.dll
sidplaywx: C:/wxWidgets/gcc_lib/wxbase315u_gcc1020_x64.dll
sidplaywx: CMakeFiles/sidplaywx.dir/link.txt

Looks like going through the files in deps/lib/* CMakeLists_msw.txt and making different ones for linux would get it built, but I don't know how to do this in a cross-distro way, as the directories are named differently on different distributions.

Hope this post might help soemone else dig-in and do a proper linux setup :)