Comment 4 for bug 292381

This is why one can't use modems:

# ./setup
checking for running kernel version...2.6.24
checking for ptserial...ptserial-2.6.c
checking for gcc...4.2.4
checking for kernel gcc version...4.2.3
** error
installed gcc version 4.2.4 does not match kernel gcc version 4.2.3
installing the kernel driver module is not possible
installing a different version of gcc, or your kernel, is necessary
** compilation error

3th party kernel modules can't be built.