gnome-software-dev doesn't contain all the header files in /usr/include/gnome-software

[Paweł]

I have tried to compile example plugin mentioned here:
https://gitlab.gnome.org/GNOME/gnome-software/-/blob/master/contrib/gs-plugin-example.c
and here:
https://developer.gnome.org/gnome-software/stable/plugins.html
I have installed package gnome-software-dev (required for compilation)

But I am not able to compile it:

$ gcc -shared -o libgs_plugin_example.so gs-plugin-example.c -fPIC `pkg-config --libs --cflags gnome-software` -DI_KNOW_THE_GNOME_SOFTWARE_API_IS_SUBJECT_TO_CHANGE
In file included from gs-plugin-example.c:5:
/usr/include/gnome-software/gnome-software.h:16:10: fatal error: gs-app-collation.h: No such file or directory
   16 | #include <gs-app-collation.h>
      | ^~~~~~~~~~~~~~~~~~~~
compilation terminated.

It appears package gnome-software-dev lacks some headers.

This issue was already reported here:
https://gitlab.gnome.org/GNOME/gnome-software/-/issues/1119#note_1002516

My system:
Description: Ubuntu 20.04.2 LTS
Release: 20.04

Package version:
apt-cache policy gnome-software-dev
gnome-software-dev:
  Zainstalowana: 3.36.1-0ubuntu0.20.04.0
  Kandydująca: 3.36.1-0ubuntu0.20.04.0
  Tabela wersji:
 *** 3.36.1-0ubuntu0.20.04.0 500
        500 http://pl.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     3.36.0-0ubuntu3 500
        500 http://pl.archive.ubuntu.com/ubuntu focal/main amd64 Packages

[Sebastien Bacher (seb128)]

the issue was an upstream one fixed in the current Ubuntu serie

https://gitlab.gnome.org/GNOME/gnome-software/-/commit/5b0e476