Just like almost every ./configure script out there, when configuring gnokii before compiling you can let the script automatically figure out what libraries you have got or you can explicitly enable or disable some features.
The features that will be available when version 0.6.15 is out are:
$ ./configure --help [...] --disable-nls do not use Native Language Support --enable-fulldebug compile with full debugging support --enable-debug compile with debug code --enable-xdebug compile with xdebug code --enable-rlpdebug compile with RLP debug code --enable-libical enable libical support (default is autodetected) --enable-libusb enable libusb support (default is autodetected) --enable-irda enable irda support (default is autodetected) --enable-bluetooth enable bluetooth support (default is autodetected) --enable-security enable all security features [...]
Note that you can't enable a feature if you haven't installed the needed libraries and/or includes (almost always you need a devel- package). Well, you can, but it will eventually fail.
The ./configure script accepts arguments in various formats; for example the following are all synonyms to enable the compiling of Bluetooth stuff:
--enable-bluetooth --enable-bluetooth=yes
or to disable it:
--enable-bluetooth=no --disable-bluetooth