Compiling Error 1

[Xleniz]

When I'm compiling I'm getting error 1. (only that error)
Can anyone help?

 

[Xleniz]

ok, i fixed it, but now i have another problem:

  [Linker error] undefined reference to `Guilds::getGuildIdByName(unsigned int&, std::string const&)' 
  [Linker error] undefined reference to `Guilds::getGuildById(unsigned int)' 
  [Linker error] undefined reference to `Guilds::getGuildIdByName(unsigned int&, std::string const&)' 
  [Linker error] undefined reference to `Guilds::loadWars()' 
  [Linker error] undefined reference to `Guild::isEnemy(unsigned int) const' 
  [Linker error] undefined reference to `Guild::isEnemy(unsigned int) const' 
  [Linker error] undefined reference to `Guild::isEnemy(unsigned int) const'

and more, what should I link ?