Thanks Ablu! This linker error caused by binary incompatible. The libraries and the source compiled with different GCC. With the help of Ablu, assign the gcc compiler in Code::Blocks with the official MingW. If you still get such issue, try to change a gcc version or ask the developer update the lib...

I guess I dit it. I have git the whole project "mana-mingw-libs" on my disk. In Code::Blocks my build options look like this: build options->Search directories->Compiler src\ include ..\mana-mingw-libs\include\libxml ..\mana-mingw-libs\include libs\enet\include build options->Search direct...

I got the same error. Any suggestions?