Re: [Discuss-gnuradio] gr-qtgui configuring?

[Bob McGwier]

Eric Blossom wrote:
> On Sat, May 05, 2007 at 10:25:38PM -0400, Michael Dickens wrote:
>   
> > My bad ... RTF Readme file that goes along with gr-qtgui!  Requires  
> > qwt >= 5.0.0 !  Ububtu Edgy can install QWT 4.2, but no greater ... doh!
> >
> > Can we check for this in the m4 file somehow (the QT version is  
> > already checked for, so why not also QWT?)?
> >
> > QWT version is found in the file qwt_global.h, under the name  
> > QWT_VERSION.  Looks like there's no pkgconfig file for qwt installed  
> > by default, but there is one at <http://n4hy.org/Qwt/qwt.pc> that  
> > could be copied in separately.  If we want to require the  
> > installation of 'qwt.pc', then something can be added to the  
> > "grc_gr_qtgui.m4" script along the lines of:
> >
> >     PKG_CHECK_MODULES(QWT, qwt >= 5.0.0,[],
> >     [passed=no;AC_MSG_RESULT([gr-qtgui requires libqwt >= 5.0.0.])])
> >
> > If not using 'qwt.pc', then I'd suggest adding to the "gr_qwt.m4"  
> > script something along the lines of:
> >
> >     AC_TRY_LINK([#include <qwt_global.h>],
> >                 [#if QWT_VERSION < 0x050000 foo #endif],
> >                 [],
> >                 [libqwt_ok=no;AC_MSG_RESULT([QWT library version  
> > must be at least 5.0.0])]
> >     )
> >
> > Or maybe trying both (along the lines of first searching for libqt,  
> > then libqt-mt) ... with the PKG_CHECK first trying as written, then a  
> > backup to trying the "gr_qwt.m4" with the addition above.  I don't  
> > have time to try these out tonight, but can do so tomorrow or Monday  
> > unless someone else wants to. - MLD
> >     
>
> Unless the upstream guys produce and ship the .pc file I don't want to
> check for it with pkgconfig.  The second seems OK.
>
> Eric
>
>   

I agree with this and we have repeatedly asked, pleaded, begged, 
demanded they do this.  These widgets are extremely useful, many done 
specifically for radio work, and for that reason, along with the speed, 
I view them as useful enough to put up with the current shortcomings.

Bob

--
Robert W. McGwier, Ph.D.
Center for Communications Research
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