Re: build problems with wxGTK 3.0

[Allin C. <cot...@wf...>]

On Thu, 19 Jun 2014, Ethan A Merritt wrote:

> On Thursday, 19 June, 2014 22:27:46 Mojca Miklavec wrote:
>> On Thu, Jun 19, 2014 at 9:31 PM, Ethan A Merritt
>
>>>> So please also check whether wxWidgets are using gtk2 or gtk3 before
>>>> calling pkg-config to supply build flags.
>>>
>>> That's a chicken-or-egg dilemma.
>>> wx-config is supposed to tell us the version, but we need the version in
>>> order to call the correct wx-config.
>>
>> I don't see any chicken here ;)
>>
>> Once gnuplot calls
>>     WX_CXXFLAGS="`$WX_CONFIG --cxxflags
>> it already knows which $WX_CONFIG it is calling.
>>
>> The problematic line is only
>>     PKG_CHECK_MODULES(GTK, [gtk+-2.0], have_gtk=yes, have_gtk=no)
>>
>> Gnuplot should run
>>     "$WX_CONFIG" --basename | <grep something>
>> before asking for gtk+-2.0.
>
> On linux (at least on my machines) there are two different wx-configs,
> one for wx2 and one for wx3.   You need to pick up the version from somewhere
> before you even know which one to run.

Running on Mac, Mojca may or may not realize that most, if not all, 
modern Linux distros pack both gtk2 and gtk3, and therefore both 
variants of wxWidgets may also be present.

Software that supports both variants must therefore establish a 
policy. The software that I work on, gretl, has chosen (bowing to 
the apparently inevitable) to make gtk3 the default, if available, 
but we have a configure option

--enable-gtk2

Most users won't have to worry about this. If they only have gtk2, 
that will be used regardless; if they only have gtk3, that will be 
used regardless; if they have both, gtk3 will be used unless they 
apply this "enable" flag when configuring.

Allin Cottrell