this will hopefully catch issues like [337] in the future.
not using gcc and/or clang since we have 5 build options right now,
which means 2^5 = 32 different combination. using gcc/clang would take
too much resources and time; meanwhile tcc is lightning fast.
[337]: https://codeberg.org/nsxiv/nsxiv/pulls/337
Reviewed-on: https://codeberg.org/nsxiv/nsxiv/pulls/338
Reviewed-by: eylles <eylles@noreply.codeberg.org>
