Re: console mode gnuplot for windows with wxt doen not work (gnuplot 4.3 / mingw)

[Benjamin L. <lin...@gm...>]

> Hello
> 
> I have posted a thread about a problem on console mode gnuplot for windows
> with wxt.
> I am using GCC-4.4.0/Mingw. 
> 
> The gnuplot.exe (ver 4.3 ) with does not start.
> 
> $ gnuplot
> 
> Tatsu@INSPIRON6000 /c/Program Files/Gnuplot4.3wxt
> $
> 
> Without wxt
> $ gnuplot
> 
> 
>         G N U P L O T
>         Version 4.3 patchlevel 0
>         last modified August 2009
>         System: MS-Windows 32 bit
> 
>  :
>  :
> 
> However, 
> $ gnuplot -e "plot sin(x); pause 1"
> and
> $ echo 'plot sin(x) ; pause 1'  | gnuplot
> 
> works even on gnuplot with wxt.
> 
> I have struggled with gdb and found that
> 
> (!isatty(fileno(stdin))) is false for the gnuplot without the wxt but true
> for one without wxt.
> I also found taht stdin, stdout, and stderr does not work.
> 
> In short,  gnuplot with wxt built on gcc/mingw does not have standard i/o.
> 
> Perhaps this may be a side effect with gnuplot linked with wxWedgets.
> 
> Michael Goffioul had built the console mode of gnuplot for windows with
> wxt by MSVC++.
> 
> This problem may be specific to the combination of GCC/mingw and wxt.
> 
> Does anyone have ideas on this issue ?
> 

The wxt link flags incorrectly include the setting "-mwindows", which causes gnuplot to be a gui-subsystem application, no longer a console-subsystem application. Thus stdin/stdout will not work.
You have to modify the flags returned by wx-config.

benjamin
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