Incomplete discovery of libraries about pillow

[radarhere]

Hi. From your logs, Pillow is searching for raqm.h, but doesn't find it.

  Checking for include file raqm.h in /nix/store/fbq6rwbqpwpvgs6jm5bzgqi5zf5h92wj-freetype-2.13.2-dev/include
  Checking for include file raqm.h in /nix/store/0sksvw4kvr3j63md09z11b6q9xj776kj-libjpeg-turbo-2.1.5.1-dev/include
  Checking for include file raqm.h in /nix/store/0phdb1r6chn6ifindy9d1436sy7b8wn4-openjpeg-2.5.0-dev/include/openjpeg-2.5
  Checking for include file raqm.h in /nix/store/c8z6bw47x52fja2q85iqgi3gqnnp4854-libtiff-4.6.0-dev/include
  Checking for include file raqm.h in /nix/store/68289cwrk5pjj6nmlb7r76qqpw99s011-zlib-1.3-dev/include
  Checking for include file raqm.h in /nix/store/xg5p8vpqglfg9mlcvnchr8hhhf04m9ii-lcms2-2.15-dev/include
  Checking for include file raqm.h in /private/tmp/Pillow/venv/include
  Checking for include file raqm.h in /Library/Developer/CommandLineTools/SDKs/MacOSX14.4.sdk/usr/include
  Checking for include file raqm.h in /usr/local/include
  Checking for include file raqm.h in /private/tmp/Pillow/venv/include
  Checking for include file raqm.h in /Users/laggron/.pyenv/versions/3.11.4/include/python3.11

So where is your raqm.h located?

Similarly, it goes looking for webp/encode.h and doesn't find it.

  Checking for include file webp/encode.h in /nix/store/fbq6rwbqpwpvgs6jm5bzgqi5zf5h92wj-freetype-2.13.2-dev/include
  Checking for include file webp/encode.h in /nix/store/0sksvw4kvr3j63md09z11b6q9xj776kj-libjpeg-turbo-2.1.5.1-dev/include
  Checking for include file webp/encode.h in /nix/store/0phdb1r6chn6ifindy9d1436sy7b8wn4-openjpeg-2.5.0-dev/include/openjpeg-2.5
  Checking for include file webp/encode.h in /nix/store/c8z6bw47x52fja2q85iqgi3gqnnp4854-libtiff-4.6.0-dev/include
  Checking for include file webp/encode.h in /nix/store/68289cwrk5pjj6nmlb7r76qqpw99s011-zlib-1.3-dev/include
  Checking for include file webp/encode.h in /nix/store/xg5p8vpqglfg9mlcvnchr8hhhf04m9ii-lcms2-2.15-dev/include
  Checking for include file webp/encode.h in /private/tmp/Pillow/venv/include
  Checking for include file webp/encode.h in /Library/Developer/CommandLineTools/SDKs/MacOSX14.4.sdk/usr/include
  Checking for include file webp/encode.h in /usr/local/include
  Checking for include file webp/encode.h in /private/tmp/Pillow/venv/include
  Checking for include file webp/encode.h in /Users/laggron/.pyenv/versions/3.11.4/include/python3.11

So where is your webp/encode.h located?

[Yay295]

There are two log files at the gist they linked. The second one has:

  Looking for Raqm
  Checking for include file raqm.h in /nix/store/fbq6rwbqpwpvgs6jm5bzgqi5zf5h92wj-freetype-2.13.2-dev/include
  Checking for include file raqm.h in /nix/store/0sksvw4kvr3j63md09z11b6q9xj776kj-libjpeg-turbo-2.1.5.1-dev/include
  Checking for include file raqm.h in /nix/store/0phdb1r6chn6ifindy9d1436sy7b8wn4-openjpeg-2.5.0-dev/include/openjpeg-2.5
  Checking for include file raqm.h in /nix/store/c8z6bw47x52fja2q85iqgi3gqnnp4854-libtiff-4.6.0-dev/include
  Checking for include file raqm.h in /nix/store/68289cwrk5pjj6nmlb7r76qqpw99s011-zlib-1.3-dev/include
  Checking for include file raqm.h in /nix/store/xg5p8vpqglfg9mlcvnchr8hhhf04m9ii-lcms2-2.15-dev/include
  Checking for include file raqm.h in /nix/store/5vg2xz1wmq9f6kjnrg465y6sikqwxsmf-libraqm-0.10.1/include
  Found raqm.h
  Found library raqm at /nix/store/5vg2xz1wmq9f6kjnrg465y6sikqwxsmf-libraqm-0.10.1/lib/libraqm.dylib

The WEBP files were not found in either log though.

[radarhere]

If you're simply looking for a way to make it work without modifying setup.py, then you can add directories to search for header files with -I and directories to search for libraries with -L, like

CFLAGS="-I/usr/include -L/usr/lib" python3 -m pip install Pillow --no-binary :all:

I'm not familiar with nixpkgs. It looks like it is using a different include directory for each library, which seems unusual. If you'd like Pillow to work with that out of the box, then the local modification you've made sounds like something you could take and make into a pull request.

[radarhere]

I've created #8142 with your change to resolve this.

[laggron42]

Hi, sorry if that was unclear, but basically what is happening with most installations is that pkg-config would return a directory for one of the requested libs, and the include directory for raqm and webp would usually be in the same folder, so it worked for most users. The PR you opened fixes that problem, thanks!