Re: gnuplot 5.0.1 build error: use of undeclared identifier 'GE_replot'

[Brian W. <bri...@gm...>]

> On Aug 3, 2015, at 1:54 PM, Daniel J Sebald <dan...@ie...> wrote:
> 
> On 08/03/2015 11:40 AM, Brian Weitzner wrote:
>> Hello,
>> 
>> I am trying to build gunplot on a Mac via macports and I get the
>> following error:
>> 
>> :info:build In file included from term.c:1194:
>> :info:build In file included from ./term.h:254:
>> :info:build ../term/caca.trm:2514:3: warning: implicit declaration of
>> function 'process_event' is invalid in C99 [-Wimplicit-function-declaration]
>> :info:build process_event(GE_replot, 0, 0, 0, 0, 0);
>> :info:build ^
>> :info:build ../term/caca.trm:2514:17: error: use of undeclared
>> identifier 'GE_replot'
>> :info:build process_event(GE_replot, 0, 0, 0, 0, 0);
>> :info:build ^
>> 
>> Has this issue been encountered and/or resolved by anyone else? Any help
>> or information is appreciated. Thanks.
> 
> I can only guess, but it is likely that some of the pre-processor conditionals are set up correctly.  For example, in caca.trm is the following:
> 
> #ifdef USE_MOUSE
> static TBOOLEAN process_event(char type, int mx, int my, int par1, int par2, int winid); /* wrapper for do_event() */
> #endif
> 
> Implicit declaration would suggest this declaration isn't being included.  Is USE_MOUSE defined in your case?  (Check the config.log file.)
> 
> In fact that does look to be a problem.  All cases of process_event() calls appear to be protected by
> 
> #ifdef USE_MOUSE
> #endif /* USE_MOUSE */
> 
> except this one is not:
> 
> TERM_PUBLIC void
> CACA_modify_plots(unsigned int operations, int plotno)
> {
> [snip]
> 	if (changed) {
> 		/* Replot only if something changed. */
> 		CACA_zoom_or_replot = TRUE;
> 		process_event(GE_replot, 0, 0, 0, 0, 0);
> 	}
> }
> 
> This whole routine is not needed so it too could be conditioned out with #ifdef USE_MOUSE, but that factors into the function table construction, so it's best to let Ethan deal with that.
> 
> I think for the time being you should ensure that USE_MOUSE is defined via the configuration process.
> 
> Dan

Thanks, Dan. Looking through config.log, I found the following:

configure:16459: result:   Mouse support in interactive terminals: no

That’s the only mention of mouse support in the output. At least within the MacPorts system, it is unclear how to change the setting and still get things going.

-- 
Brian D. Weitzner
Postdoctoral Fellow
Chemical & Biomolecular Engineering
Johns Hopkins University
Baltimore, Maryland 21218
http://graylab.jhu.edu <http://graylab.jhu.edu/>