git repo status change

When I make changes to the gnunet-ext repo .h and .c files and build, the .m4 
files also get part of the git delta.

Is it supposed to be like this?

--

$ git status
On branch master
Your branch is up to date with 'origin/master'.

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        modified:   m4/libtool.m4
        modified:   m4/ltoptions.m4
        modified:   m4/ltsugar.m4
        modified:   m4/ltversion.m4
        modified:   m4/lt~obsolete.m4
        modified:   src/ext/gnunet-ext.c
        modified:   src/ext/gnunet-service-ext.c
        modified:   src/ext/test_ext_api.c
        modified:   src/include/gnunet_ext_service.h
        modified:   src/include/gnunet_protocols_ext.h