Build fails because missing GKlib

[kmodexc]

I had an issue with the build of ParOpt. I could compile everything and it worked until i tried to import ParOpt. Here is the error:

python3 -c "from paropt import ParOpt":                                                                                  
Traceback (most recent call last):                                                                                                
File "<string>", line 1, in <module>                                                                                            
ImportError: /root/git/paropt/lib/libparopt.so: undefined symbol: gk_jbufs

I could solve it by building the library together with libGKlib.a. But as far as i see it there is nothing saying so. I would add something in Makefile.in to configure the paths and then also add the library at build.