Hi all

I just installed libgd, zlib and libpng on a Tru64 machine to be able ot genrate png's and jpeg's with plplot. Unfortunately, while configuring plplot, I got these messages:

--------------
...
checking for main in -lgd... yes
checking for main in -lpng... yes
checking for main in -ljpeg... yes
checking for main in -lz... yes
checking for png support in libgd... no: png driver disabled
checking for jpeg support in libgd... no: jpeg driver disabled
warning: cd header files not found
...
--------------

I'd appreciate any ideas to get around this problem.
Thanks

Dimitre