Re: incorrect plot on qt terminal on windows (MinGW) (was Re: cannot find entry symbol mainCRTStartup; defaulting to 00401000 (gnuplot_qt))

[Tatsuro M. <tma...@ya...>]

--- On Thu, 2014/5/29, Tatsuro MATSUOKA wrote:
> --- On Thu, 2014/5/29, Tatsuro MATSUOKA wrote:
> > --- On Thu, 2014/5/29, Daniel J Sebald wrote:
> > > On 05/28/2014 09:03 PM, Tatsuro MATSUOKA wrote:
> > > > Hello
> > > >
> > > > I am trying to build gnuplot for windows with qt terminal on MinGW platform.
> > > >
> > > > In linking gnuplot_qt.exe, the following warnig appear:
> > > >   warning: cannot find entry symbol mainCRTStartup; defaulting to 00401000
> > > >
> > > > Perhaps this is related to failure in executing qt terminal.
> > > 
> > > Maybe, but I don't think so because the program runs.  That warning is 
> > > indicating that the linker can't find main(){} for some reason and is 
> > > making a good guess at it.
> > 
> > Thank you for your reply.
> > gnuplot_qt.cpp has apparently a main() function.
> > 
> > <snip>
> > #include "QtGnuplotApplication.h"
> > #include <QtCore>
> > #include <signal.h>
> > 
> > int main(int argc, char* argv[])
> > <snip>
> > 
> > 
> > 
> > > 
> > > 
> > > > Terminal type set to 'qt'
> > > > gnuplot>  plot sin(x)
> > > > Could not connect to gnuplot_qt "qtgnuplot4832" . Starting a new one
> > > >
> > > > Warning: slow font initializationgnuplot>
> > > >
> > > > I'm now using Qt-4.8.6 build myself using the same gcc (4.8.2 MinGW-w64 win32) to build
> > > > gnuplot and dependencies.
> > > 
> > > This sounds like the issue that came up not too long ago about TrueType 
> > > fonts taking much longer than they should to load.  There were two 
> > > TrueType fonts in particular found to be the problem, but I forget which.
> > 
> > Mmmm. Does anyone remember the issue?
> > 
> > Anyway thanks for your pointer.
> > 
> > Tatsuro  
> > 
> 
> I have referred msvc/Makefile.  From the description "$(LD) /entry:mainCRTStartup" in it, I have used  -Wl,-emainCRTStartup flag.  I deleted this flag and I can see qt terminal plot but it is insufficient.
> 
> See: 
> http://www.geocities.jp/tmgpltwin/Files/Files.html#0058
> 20140529qt_mgw.png
> 
> On the command line I found the message:
> 
> gnuplot> plot sin(x)
> 
> Warning: slow font initializationqt_processTermEvent received a GE_fontprops eve
> nt. This should not have happened.
> 
> Any suggestions?

I closed gnuplot and restart it and then 

Terminal type set to 'qt'
gnuplot> plot sin(x)
gnuplot>

No meassage appeared and plot is appeared as:
http://www.geocities.jp/tmgpltwin/Files/Files.html#0059
20140529qt_mgw2.png

However, mouse zoom and grid buttom does not work. Other features (like save as) will be tested later.

Regards

Tatsuro