Well... I really needed to recompile X, but before that I did a lot of package deletiona nd package addition (was trying to reinstall GNOME)... then I came upon this error. How do I fix it?

cc -c -O -I../../include -I../../imports/x11/include/X11 `./ccimake` imake.c
In file included from /usr/include/signal.h:333,
from imake.c:182:
/usr/include/bits/sigcontext.h:28:29: asm/sigcontext.h: No such file or directory
In file included from /usr/include/errno.h:36,
from imake.c:234:
/usr/include/bits/errno.h:25:26: linux/errno.h: No such file or directory
In file included from /usr/include/bits/posix1_lim.h:153,
from /usr/include/limits.h:144,
from /usr/lib/gcc-lib/i486-slackware-linux/3.3.6/include/limits.h:122,
from /usr/lib/gcc-lib/i486-slackware-linux/3.3.6/include/syslimits.h:7,
from /usr/lib/gcc-lib/i486-slackware-linux/3.3.6/include/limits.h:11,
from imake.c:255:
/usr/include/bits/local_lim.h:36:26: linux/limits.h: No such file or directory
make[2]: *** [imake.o] Error 1
make[2]: Leaving directory `/usr/src/xc/config/imake'
make[1]: *** [imake.proto] Error 2
make[1]: Leaving directory `/usr/src/xc'
make: *** [World] Error 2

your userspace kernel headers are missing