To use GEM or PDP, you need to install some extra libs:

glut glut-shlibs gsl-shlibs libpng-shlibs libpng3 libpng3-shlibs libquicktime0-shlibs libmpeg libmpeg-shlibs ffmpeg

The easiest way to do this is to have Fink (http://fink.sf.net )
installed and run this command (all on one line):

sudo apt-get install glut glut-shlibs gsl-shlibs libpng-shlibs libpng3
libpng3-shlibs libquicktime0- shlibs libmpeg libmpeg-shlibs ffmpeg

if any of those packages fail, you can try:

sudo fink install PACKAGE_NAME

Replacing PACKAGE_NAME with the name of the failed package.

.hc

On Thursday, Oct 2, 2003, at 11:56 America/New_York, Enrique Franco
wrote:

Hi,

I have downloaded your pd installer and PD works fine. I want to get
gem working but when I try to open Pd with:

/usr/local/bin/pd -rt -lib gem

..Pd shuts down and I get this:

dyld: /usr/local/bin/pd Undefined symbols: _ceilf _drand48 _floorf _fmodf _glBindVertexArrayAPPLE

Man has survived hitherto because he was too ignorant to know how to
realize his wishes. Now that he can realize them, he must either change them, or perish. -William Carlos Williams