I did as instructed:
run "perl Makefile.PL", make, make test, make install
Everything seems to have worked. All perl plugins were also copied into /usr/lib/gimp/2.0/plug-ins.
I also did: chmod 755 /usr/lib/gimp/2.0/plug-ins/tex-to-float
as instructed, but the plugin is not accessible from Filters->Render. Is it because I'm using a x86_64 system?
I copied tex-to-float into /usr/lib64/gimp/2.0/plug-ins/ and now the plugin is visible. However, when I tried to use it, I got several error messages such as:
"Calling error for procedure 'gimp-procedural-db-proc-info': Procedure 'gimp-gimp-image-undo-group-start' not found".
The same for the procedures: gimp-gimp-context-push and gimp-gimp-load.
I cannot find them anywhere...