Re: Building with Qt depends on pkg-config, Qt 5 term doesn't work on OS X

[Bastian M. <bma...@we...>]

Am 24.02.2014 20:39, schrieb Ethan A Merritt:
> On Monday, 24 February, 2014 20:28:05 Mojca Miklavec wrote:
>> On Mon, Feb 24, 2014 at 7:25 PM, Ethan A Merritt wrote:
>>
>> The problem is that -I/opt/local/include seems to be the first
>> argument to compiler "no matter what". I inspected the Makefiles a bit
>> and it seems that this is set by CPPFLAGS. I'm not exactly sure what
>> sets it, but the workaround seems to be to set
>>      export INCLUDES="$QT_CFLAGS"
>> which puts the paths to Qt5 in front of everything else. Without that,
>> Qt4 is always found first.
>>
>> Despite this, I still believe that configuration should work properly
>> when pkg-config is absent.
>>
>> Weird enough, after I have compiled gnuplot in a slightly different
>> way (without excluding MacPorts libraries, but maybe only the timing
>> has changed), I get
>>
>> gnuplot> plot sin(x)
>> QIODevice::write: device not open
>> QIODevice::write: device not open

The reason for these is the section below in qt_graphics(). The first 
time it is called the qt->socket is not yet open and thus the call to 
qt_flushOutBuffer will fail:

	qt->out << GEDesactivate;
	qt_flushOutBuffer();
	qt_connectToServer();

Adding this snippet to qt_flushOutBuffer() solves that problem:

	if (!qt || !qt->socket.isValid())
		return;

But maybe the order of commands in qt_graphics() should be changed instead.

   Bastian

>
> I get those messages also.  They seem to be harmless.
>
>> Error: short read from gnuplot_qt socket
>> gnuplot> qt_processTermEvent received a GE_fontprops event. This
>> should not have happened
>
> But that, as it self-declares, should not happen.
> Let me think about what it might mean.
>
>> gnuplot> plot sin(x)
>>
>> but the mouse events work. The first plot is still very weird with
>> wrong font initializations.
>
> That is consistent with the error message you showed.
> The font metrics information for the first plot was apparently
> delivered to the wrong recipient and/or at the wrong time.
>
> 	Ethan
>
>
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