What means "Error 2"?

[Andreas Jellinghaus]

> make[2]: *** No rule to make target 
> `/usr/src/linux-2.4.25/include/linux/modversions.h', needed by `hostap.o'.  

you need to configure the kernel. a plain, unconfigured kernel will not
do. if you have the config file of your current kernel e.g. in
/boot/config-2.4.25, then this should work.

cd /usr/src/linux
cp /boot/config-2.4.25 .config
make oldconfig

however if your current kernel uses a different source code than the one
in /usr/src/linux-2.4.25, it might not work.

Good luck.

Andreas