I did that, I copied and added all my old files to the new project, and when trying to build and run I get the error:
This application has failed to start because wxmsw28u_gcc_custom.dll was not found. Re-installing ...
I even completely uninstalled wxsmith and reinstalled and recompiled (monolithic=1, shared=0, unicode=1), and this file is nowhere in my wxsmith folder... and now my old project doesn't compile because of the same error. If I edit the project file in a text editor, changing all gcc_dll to gcc_lib, the error about the dll goes away, but I do get a bunch of undefined reference compiler errors.
So, the empty project idea doesn't compile because of that dll error even after a full reinstall. I don't get it, why does this happen? There's no reference to gcc_dll anywhere in that project file and I compiled wxsmith with the command:
mingw32-make -f makefile.gcc MONOLITHIC=1 SHARED=0 UNICODE=1 BUILD=release
EDIT: I finally got it to compile right! And it also runs outside of the IDE just fine. There was a problem with the pch header, I think I forgot to check the option to use precompiled pch header, so I made another project with that enabled and it works just fine now.
One more thing: I added all my files to the project, but I still can't visually edit the form. It doesn't show up in resources.. any ideas how to get it to show (the .wxs file is only displayed as text)?