Thank you for looking it this. I have done my own poking around and here is
the idea I came up with, after looking at how some other games were handling
SDL:
(arguments
`(#:phases
(modify-phases %standard-phases
(delete 'configure)
(add-after 'set-paths 'set-sdl-paths
;; The makefile adds the output of `sdl2-config --cflags` to the
;; compiler flags, but sdl2-config gives us the wrong directory to
;; include. We have to add the SDL2 header directory ourselves.
(lambda* (#:key inputs #:allow-other-keys)
(setenv "CPLUS_INCLUDE_PATH"
(string-append (assoc-ref inputs "sdl-union")
"/include/SDL2"
":"
(getenv "CPLUS_INCLUDE_PATH")))
#t))
(delete 'install))))
This seems cleaner to me than patching. I tested it with `guix build` and it
seems to work, but I won't have time until next week to look into it again.
On Thursday, 21 February 2019 20:19:35 CET you wrote:
> I've looked into this and found the culprit.
>
> > $ echo $C_INCLUDE_PATH
> > /gnu/store/x3r6c04n583q3fz7szm32ahycrxgfiz6-profile/include
>
> This is not correct. You should have a ":"-separated list of store items
> brom bzip2 to libxau.
>
> > $ sdl2-config --cflags
> > -I/gnu/store/4bhz5xzr39v0kgxf3ipv6kswicrdmkk4-sdl2-2.0.9/include/SDL2
>
> Indeed, sdl2-config should return the path to the union, not the sdl2
> package. SDL2_mixer is missing, which leads to the error.
>
> It seems to be an issue with sdl2-config. Any idea, anyone?
