Problem compiling tarball

[Albert Wagner <alwagner tcac net>]

Just installed gnome on a slackware7.1 system.  Trying to complile my
first tarball under gnome, I get the following error during ./configure:
--------------
checking for GTK - version >= 1.2.0... no
*** Could not run GTK test program, checking why...
*** The test program failed to compile or link. See the file config.log
for the
*** exact error that occured. This usually means GTK was incorrectly
installed
*** or that you have moved GTK since it was installed. In the latter
case, you
*** may want to edit the gtk-config script: /usr/bin/gtk-config
configure: error: GTK not installed
-------------
I actually have gtk1.2.8 installed. Here is the corresponding snippet
from the config.log:
--------------
configure:2185: checking for GTK - version >= 1.2.0
configure:2286: gcc -o conftest -g -O2 -Wall -Wunused 
-I/usr/lib/glib/include -I/usr/X11R6/include   conftest.c -L/usr/lib
-L/usr/X11R6/lib -lgtk -lgdk -rdynamic -lgmodule -lglib -ldl -lXext
-lX11 -lm  1>&5
/usr/lib/libgdk.so: undefined reference to `shmctl@@GLIBC_2.0'
/usr/lib/libgtk.so: undefined reference to `localeconv@@GLIBC_2.0'
collect2: ld returned 1 exit status
--------------
libgdk.so is a symlink to libgdk-1.2.so.0.5.3.  Thanks ahead for any
help.