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

[Eric Blossom]

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