For current sources HPMHooking_char is useless, because nothing can be hooked in char server.
Ignore this error if dont want char server hooks or wait until Haruna will review and add char server interfaces and other from here https://github.com/HerculesWS/Hercules/pull/388
If you using plugins, error must be fixed before start production server.
If you not using plugins, dont care. Server simply must just works, if it works then all ok. (works i mean you can connect to game and play)
This is wrong solution.
Server compiled fine in x64, but need use standard tools.
Also i cant find any reference to adelays. May be you using outdated server sources?
1. Try at first run command: autoreconf
This command will update/build configure script
2. then run configure with your flags, or simple ./configure
probably need disable lto, because look like here bug. this mean run: ./configure --disable-lto
3. now run make.
Yes compilation with only mariadb is possible. For build with mariadb only need change configure a bit and install libmariadb* dev package.
I think i can create pull request for this,
but not sure is devs will add it or not.