Re: Octave 4.0 on Mac OS Yosemite (with gui!)

[Ben Abbott]

> On Jul 25, 2015, at 4:19 PM, Ben Abbott <address@hidden> wrote:
> 
>> On Jul 25, 2015, at 11:07 AM, Dr. Sebastian Schöps <address@hidden> wrote:
>> 
>>>> Mike Miller-4 wrote
>>>>> There was a recent change that figures for the manual are built by the
>>>>> default toolkit, which means qt if available, then fltk if available,
>>>>> then gnuplot. But there is no check ensuring that you also have osmesa
>>>>> present and working. I could see that as a worthy enhancement, fall back
>>>>> to gnuplot if no osmesa.
>>>>> 
>>>>> -- 
>>>>> mike
>>>> 
>>>> That would be great. Getting osmesa seems to be problematic on several
>>>> platforms (also ubuntu as seen in the other recent thread)
>>> 
>>> Agreed. I would also like to be able to figure out how to use the osmesa 
>>> support provided by XQuartz. Does anyone know if there are known issues, or 
>>> are we just doing something wrong (not setting LDFLAGS or LIBS correctly?).
>>> 
>>> Ben
>> 
>> I did some experiments with osmesa but so far without success. homebrew has 
>> a dedicated formula for osmesa 
>> (https://github.com/Homebrew/homebrew-x11/blob/master/mesalib-glw.rb) but it 
>> disables gl-osmesa which seems to be the most important part.
> 
> The Qt libs for Mac OSX use native graphics, while osmesa support is part of 
> X11. Perhaps this is a problem? Does homebrew have an OSMesa formula? I’ve 
> just installed Fink’s package for osmesa and had to tinker a bit for 
> configure to work.
> 
> Initially, I got ...
> 
> checking osmesa.h usability... no
> checking osmesa.h presence... no
> checking for osmesa.h... no
> checking GL/osmesa.h usability... yes
> checking GL/osmesa.h presence... yes
> checking for GL/osmesa.h... yes
> checking for OSMesaCreateContext in -lOSMesa... no
> configure: WARNING: OSMesa library not found.  Offscreen rendering with 
> OpenGL will be disabled.
> 
> I then addeded "-L/sw/lib/mesa“ to the LDFLAGS and "-I/sw/include/mesa” to 
> the CPPFLAGS. After than configure found and was able to use the OSMesa 
> library. When done, configure reported …
> 
>       OSMesa libraries:            -lOSMesa
> 
> My build fails due to errors like ...
> 
>       /sw/include/mesa/GL/osmesa.h:249:1: error: unknown type name 'GLAPI'
>       GLAPI GLboolean GLAPIENTRY
> 
> Perhaps the osmesa included with XQuartz is creating a problem?
> 
>            --with-OSMesa-includedir=/sw/include/mesa \
>            --with-OSMesa-libdir=/sw/lib/mesa \
> 
> Does anyone have any insight?

ls -1 /sw/lib/mesa/libOSMesa*
/sw/lib/mesa/libOSMesa.6.5.dylib
/sw/lib/mesa/libOSMesa.6.dylib
/sw/lib/mesa/libOSMesa.a
/sw/lib/mesa/libOSMesa.dylib

Apparently, my version is OSMesa is 6.5. The wiki indicates I need > 9.0

http://wiki.octave.org/OSMesa

It seems unlikely that the compile error is related, but if I’m able to get the 
OSMesa part of build, problems will remain.

Ben