[PD] problems with gem'installation on linux

If someone has any experience on GEM with linux platform !!

I compiled pd and it work fine. It's not the same for GEM, it don't want to compile because of the abscence of the strcmp function :

primTri.cpp: In method void primTri::typeMess (t_symbol *)': primTri.cpp:126:strcmp' undeclared (first use this function) primTri.cpp:126: (Each undeclared identifier is reported only once for each function it appears in.) make[1]: *** [primTri.o] Erreur 1 make[1]: Quitte le répertoire `/usr/local/src/gem-0.84/src/Geos' make: *** [subdirs] Erreur 255

I tried to add in *.cpp : #include <string.h>
And it compiled as well.

My openGL environement is working fine with mesademo binaries.

When I lauch pd, with verbose and lib flags, it's return all ok :

tried /usr/local/lib/pd/externs/Gem.pd_linux and succeeded GEM: Mark Danks GEM: ver: 0.84-5 GEM: compiled: Nov 20 2001 audio I/O stuck... closing audio

At the time I create un windows, it returns on std :

error: GEM: Could not open display <I

error: GEM: Error creating const context error: GEM: A serious error occured creating const Context error: GEM: Do not continue GEM: window created

After that, pd crashes when I click in any pd's childrens windows.

I wondered if the "display <I" has any link with the $DISPLAY env variable, so I type; on prompt :

# echo $DISPLAY :0.0

	If someone has a idea ...

Regards