italc - Arch Linux compile error

[ 19%] Building CXX object lib/CMakeFiles/ItalcCore.dir/src/ItalcConfiguration.o
[ 19%] Building CXX object lib/CMakeFiles/ItalcCore.dir/src/LocalSystem.o
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp: In constructor ‘LocalSystem::User::User(const QString&, const QString&, const QString&)’:
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp:194:23: error: ‘getuid’ was not declared in this scope
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp: In static member function ‘static LocalSystem::User LocalSystem::User::loggedOnUser()’:
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp:317:31: error: ‘getuid’ was not declared in this scope
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp: In function ‘void LocalSystem::broadcastWOLPacket(const QString&)’:
/tmp/yaourt-tmp-root/aur-italc/src/italc-2.0.0/lib/src/LocalSystem.cpp:942:14: error: ‘close’ was not declared in this scope
make[2]: ** [lib/CMakeFiles/ItalcCore.dir/src/LocalSystem.o] Erro 1
make[1]: ** [lib/CMakeFiles/ItalcCore.dir/all] Erro 2
make: ** [all] Erro 2