All these problems are from compiler's and omp includes side:
Zeex compiler, starting from 3.10.9, added breakable changes enabling warnings 214 and 239 by default (they are absent in original pawn compiler);
omp includes has incompatible modifications of some native parameters, including wrong tags and const for string parameters which didn't have it in original samp includes
I experienced compile problems in my open.mp gamemode project when installing include next-ac. the compiler I use is v3.10.11