Solved: utils/geo_lookup.cc:131:32: error: invalid conversion from ‘const MMDB_s’ to ‘MMDB_s’ [-fpermissive]

If you see this error when you compiled Modsecurity :

utils/geo_lookup.cc:131:32: error: invalid conversion from ‘const MMDB_s’ to ‘MMDB_s’ [-fpermissive]

because you are using old lib of maxminddb to solved it you should manual compile libmaxminddb from https://github.com/maxmind/libmaxminddb/releases: 

 sudo ./configure

sudo  make

 sudo make check

 sudo make install

 sudo ldconfig

Then you compile Modsecurity again, it should be ok .