[Octave-bug-tracker] [bug #55735] QGLWidget not detected, so Qt graphics toolkit is not compiled

[anonymous]

Follow-up Comment #4, bug #55735 (project octave):

To be honest I hadn't tried.  Using


pkg-config --cflags QtCore QtGui QtHelp QtNetwork QtOpenGL QtSql QtXml



to obtain the include paths required, I configured Octave 5.0.91-7b9a5ab8350f
using


../configure ... --with-qt=4 CPPFLAGS="-I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtHelp -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtNetwork -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtOpenGL -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtGui -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtSql -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtXml -I/usr/lib64/qt/include
-I/usr/lib64/qt/include/QtCore"



Configure appears to have found OpenGL in this case:


checking QGLWidget usability... yes
checking QGLWidget presence... yes
checking for QGLWidget... yes
:
checking whether Qt works with OpenGL and GLU... yes
:
Build Octave Qt GUI:                  yes (version: 4)


Based on this, I agree that this would be a reasonable workaround for future
Octave 5 users who need to compile against Qt4.  The need to do this would
just need to be documented so the information can be found by those who need
it.

Regarding the attachment (which evidently failed on the second attempt), the
"configure" script is a touch over 2 MB (2276063 bytes), so you are probably
right.  The note on the page talking about a 16 MB limit had me thinking there
was something else going on (perhaps it didn't like scripts for example).

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