Compilation failure.

[hackerfactor]

Describe the bug

libjxl/lib/extras/dec/jpg.cc:219:5: error: ‘jpeg_mem_src’ was not declared in this scope; did you mean ‘jpeg_stdio_src’?
  219 |     jpeg_mem_src(&cinfo, reinterpret_cast<const unsigned char*>(bytes.data()),
      |     ^~~~~~~~~~~~
      |     jpeg_stdio_src
make[2]: *** [lib/CMakeFiles/jxl_extras_core-obj.dir/build.make:232: lib/CMakeFiles/jxl_extras_core-obj.dir/extras/dec/jpg.cc.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:953: lib/CMakeFiles/jxl_extras_core-obj.dir/all] Error 2
make: *** [Makefile:141: all] Error 2

[mo271]

Thanks for your report.

Are you linking to the correct libjpeg library during compilation? This should be done by cmake:

libjxl/lib/jxl_extras.cmake

Line 49 in c04b3ba

find_package(JPEG)

A prerequisite is to have libjpeg-dev installed:

sudo apt-get install `libjpeg-dev`

(see https://github.com/libjxl/libjxl/blob/main/doc/developing_in_debian.md)

[hackerfactor]

$ sudo apt install libjpeg-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
libjpeg-dev is already the newest version (8c-2ubuntu8).

[eustas]

Faced the same problem building for windows with libjpeg-turbo installed by chocolatey:
https://github.com/libjxl/libjxl/actions/runs/8819318791/job/24210224919

Investigating.