[Gretl-devel] Contribute to Gretl code (FIX for gnuplot 4.2).

[Allin Cottrell]

On Thu, 10 Apr 2008, Hélio Guilherme wrote:

> I upgraded my gnuplot to it's latest version, 4.2, and then 
> gretl's graphics got broken, like saving to a PNG. So here is a 
> fix for it.
> 
> New gnuplot 4.2 syntax made a change from "set term" to "set 
> terminal".

Thanks, Helio, I don't think that is the issue. The full command 
has always been "set terminal" but gnuplot accepts abbreviations 
provided they are unique, and "term" is a unique abbreviation for 
"terminal".

On my system, gnuplot 4.2 and 4.3 (CVS) both accept "set term".
To double-check, I just downloaded and built the latest official 
release, version 4.2.3: "set term" works fine.

What happens if you open an interactive session with your copy of 
gnuplot 4.2 and type "set term png"?

> The fix modifies files in gui2 and also the configure script, to 
> provide gnuplot version detection, and PNG support (it advises 
> users to install PNG support in gnuplot).

Please note that "configure" is a generated file, not part of the 
true source tree.  The file to modify is configure.in -- but in 
fact we do check for gnuplot's PNG support as part of gretl's 
configuration.

Allin.