[Gnuplot-info] set terminal png:unknown or ambiguous terminal type

[shelley w. <wan...@um...>]

Hello:

I'm trying to install gnuplot on my machine but having problem of  
setting the "png" terminal:

#############################
gnuplot> set terminal png
                       ^
          unknown or ambiguous terminal type; type just 'set  
terminal' for a list

#############################

My machine: Mac OS X 10.4.11 PowerPC G5
The gnuplot version: gnuplot-4.2.3
The gd library version: gd-2.0.35
I also have libpng and libjpeg installed on my machine.

I checked the gnu "config.log" file and it says:

###################
configure:16174: result:   gif terminal: yes (with animated gif)
configure:16187: result:   png terminal: yes
configure:16195: result:     (jpeg, gif and png terminals can use TTF  
fonts)
###################

But I cannot find the png terminal when typing: gnuplot> set terminal.

Can somebody help me solve this problem?

Thank you very much!

Regards,
-Shelley Wang