Re: Request for help with writing defenition for pyxel.

[Antwane Mason]

I suspect something is wrong with where python is expecting libSDL2-2.0.so.
One thing you could try is trying to figure out where libSDL2-2.0.so is and
ensuring that it's in your PATH environment variable during build time.
Looking at build log and using -K option during guix build will be helpful
for this. I think the build log should tell you what environment variables
are set to. If it doesn't, going into the temporary build directory should
help you find this information. The link below should help with how to
debug the failed build.

https://guix.gnu.org/manual/en/html_node/Debugging-Build-Failures.html

Regards,
Antwane


On Sun, Aug 29, 2021 at 2:10 PM Dmitry Polyakov <polyakov@liltechdude.xyz>
wrote:

> I requesting for help with writing defenition for python retro game
> engine[fn:1].
>
> There are steps according to manual to build this engine[fn:2]:
>
> 1. Get sources with ~git clone https://github.com/kitao/pyxel~
> 2. "cd" to this dir
> 3. Invoke ~guix environment --pure --ad-hoc gcc make python python-pip
>    coreutils findutils sdl2 sdl2-image~
> 4. Appnend this to in file pyxel/core/Makefile on line 50
>
>  ~-I/gnu/store/flvzd76nb8xzbp1sf5ckkvpwhspz9fqx-sdl-union-1.2.15/include/SDL2~
> 5. Invoke ~make -C pyxel/core clean all~
> 6. Invoke ~pip3 install .~ to install this package
>
> And I got fully functional (according to examples) package in my
> system, but when I was tried to write defenition:
> #+begin_src scheme
> (define-public python-pyxel
>   (package
>    (name "python-pyxel")
>    (version "1.4.3")
>    (source
>     (origin
>      (method url-fetch)
>      (uri "file:///home/lil/src/ring/pyxel" ;; this is version with
> modified Makefile
>           ;; (pypi-uri "pyxel" version) <- this is original content from $
> guix import pypi pyxel
>           )
>      (sha256
>       (base32
>        "1gxvagmj37gs871bh77xafm5jyiaw1hvs76wb97w96kf3g8abhkz"))))
>    (build-system python-build-system)
>    (inputs
>     `(("gifsicle" ,gifsicle)
>       ("sdl2" ,(sdl-union (list sdl2 sdl2-image)))))
>    (home-page "https://github.com/kitao/pyxel";)
>    (synopsis "A retro game engine for Python")
>    (description "A retro game engine for Python")
>    (license license:expat)))
> #+end_src
>
> I was stacked with that error[fn:3]
> #+begin_src bash
> starting phase `build'
> running "python setup.py" with command "build" and parameters ()
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
>   File "setup.py", line 2, in <module>
>     from pyxel import VERSION
>   File
> "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/__init__.py", line
> 10, in <module>
>     from . import core  # type: ignore
>   File
> "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/core/__init__.py",
> line 42, in <module>
>     _lib = _load_library()
>   File
> "/tmp/guix-build-python-pyxel-1.4.3.drv-0/source/pyxel/core/__init__.py",
> line 39, in _load_library
>     return cdll.LoadLibrary(lib_path)
>   File
> "/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/ctypes/__init__.py",
> line 451, in LoadLibrary
>     return self._dlltype(name)
>   File
> "/gnu/store/9w9jvy3bgjg4qaqmrij01nbppiccqr7c-python-3.8.2/lib/python3.8/ctypes/__init__.py",
> line 373, in __init__
>     self._handle = _dlopen(self._name, mode)
> OSError: libSDL2-2.0.so.0: cannot open shared object file: No such file or
> directory
> command "python" "-c" "import setuptools,
> tokenize;__file__='setup.py';f=getattr(tokenize, 'open',
> open)(__file__);code=f.read().replace('\\r\\n',
> '\\n');f.close();exec(compile(code, __file__, 'exec'))" "build" failed with
> status 1
> builder for
> `/gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv' failed
> with exit code 1
> build of
> /gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv failed
> View build log at
> '/var/log/guix/drvs/2v/3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv.bz2'.
> guix build: error: build of
> `/gnu/store/2v3wlpjg2mg3mllc4qkb22b34cmymiab-python-pyxel-1.4.3.drv' failed
> #+end_src
>
> As far as I can understand, firstly guix should build C++ dependencies
> and /then/ install python package. Isn't it? But I don't know how to do
> this.
>
> * Footnotes
>
> [fn:1] https://github.com/kitao/pyxel Actually is C++ and Python engine
>
> [fn:2]
> https://github.com/kitao/pyxel#execute-the-following-command-in-any-folder
>
> [fn:3] For full error see https://pastebin.com/d18Wrrq4
>
>
> --
> 魔法少女リルテチヅデですよ。
>
>