glib 1.2.9 will not compile

[Ronald Cross <roncross cox net>]

I have a G4 powerbook apple computer with a 1.0 GHz processor using mac 
os x 10.2.8 on Jaquar.  I am trying to download GIMP.  But before I can 
do this, I read that I need to download and install Glib and Gtk.  I 
downloaded both glib 1.2.9 and gtk 1.2.9 and gimp 1.2.3.  I was able to 
configure glib 1.2.9.  I was also able to build glib 1.2.9.  However, 
when I try to compile glib 1.2.9 I get the following error:


/bin/sh ./mkinstalldirs /usr/local/lib
/bin/sh ./libtool  --mode=install /usr/bin/install -c libglib.la 
/usr/local/lib/
libglib.la
/usr/bin/install -c .libs/libglib.lai /usr/local/lib/libglib.la
/usr/bin/install: /usr/local/lib/libglib.la: Permission denied
make[2]: *** [install-libLTLIBRARIES] Error 71
make[1]: *** [install-am] Error 2
make: *** [install-recursive] Error 1

Does anyone know what this means and how do I fix it so that I can 
compile glib and move on to gtk and finally onto gimp?
Any help would be greatly appreciated.

thx
Ronald Cross