configuration problems

[<seagal bennjamin berlin de>]

I have problems runing make of the libgtop pack. My box is a slackware 7.1. I have an ISDN-adapter, but I don't use it with linux. Have no idea why this stupied message:

O2 -Wall -Wunused -I/usr/X11R6/include
-DGTOPLOCALEDIR=\"/usr/local/share/locale\" -DLIBGTOP_VERSION=\"1.0.6\" -DLIBGTOP_SERVER_VERSION=\"5\" -DLIBGTOP_VERSION_CODE=1000006
-DLIBGTOP_SERVER=\"/usr/local/bin/libgtop_server\" -g -O2 -Wall -Wunused
-Wp,-MD,.deps/ppp.pp -c ppp.c  -fPIC -DPIC -o .libs/ppp.lo
ppp.c: In function `get_ISDN_stats':
ppp.c:58: `ISDN_MAX_CHANNELS' undeclared (first use in this function)
ppp.c:58: (Each undeclared identifier is reported only once
ppp.c:58: for each function it appears in.)
make[3]: *** [ppp.lo] Error 1
make[3]: Leaving directory `/gnom/libgtop-1.0.6/sysdeps/linux'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/gnom/libgtop-1.0.6/sysdeps'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/gnom/libgtop-1.0.6'
make: *** [all-recursive-am] Error 2

I have tried to reinstal everything that has to do somethin with isdn ... i installed the adapter too and it's funktional. ( actualy only the hardwear yet, not ipppd )
Can someone help me, pls ?

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