[osg-users] How to properly compile osg with EGL support?

[Trajce Nikolov NICK]

Hi Omar,

we are trying to get this running as well. Julien's hints should be enough
to get it built. I also wrote some code to support EGL based on some
off-list disucussion we had with Chris. All was great but got some crashes
in osg and was not able to actually run it. I can share my work with you
(tomorrow) if you want to give it a try and maybe together we make it work
and share it with the community?

Cheers,
Nick

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On Wed, Jan 23, 2019 at 7:51 PM Chris Hanson <xenon at alphapixel.com> wrote:

> I know of a couple other people trying to do this. Let me know how you get
> on with the X-less OSG.
>
> On Wed, Jan 23, 2019 at 7:31 PM Julien Valentin <
> julienvalentin51 at gmail.com> wrote:
>
>> few advices:
>> check your driver support with eglinfo
>> try adding -legl to the linker flags
>> try VERBOSE=1 make
>> to check used linkerflags
>> Cheers
>>
>>
>>
>> Omar Álvarez wrote:
>> > Hi.
>> > I am trying to compile OSG with EGL support in order to be able to run
>> OSG server side without an X display server. I have installed EGL headers
>> and the latest and the NVIDIA driver. EGL is detected by OSG and I am
>> requesting GLVND GL:
>> > > cmake -DOpenGL_GL_PREFERENCE=GLVND .
>> >
>> >
>> > I am getting linking errors:
>> > > [ 33%] Linking CXX executable ../../bin/osgversion
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glDrawArrays'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glCallList'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glPointSize'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glTexParameteriv'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glFrontFace'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glLightModeli'
>> > > ../../lib/libosg.so.3.6.3: undefined reference to `glGetBooleanv'
>> > > .........
>> >
>> >
>> > Is this the proper way for compiling OSG with EGL support?
>> > I am using CMake 3.13, Ubuntu 18.04 and gcc 7.3. I think the way in
>> which the OpenGL library is linked has to change (to support the new CMake
>> flag OpenGL_GL_PREFERENCE).
>> >
>> >  ------------------
>> > Post generated by Mail2Forum
>>
>>
>> ------------------------
>> Twirling twirling twirling toward freedom
>>
>> ------------------
>> Read this topic online here:
>> http://forum.openscenegraph.org/viewtopic.php?p=75535#75535
>>
>>
>>
>>
>>
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>>
>
>
> --
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> http://www.alphapixel.com/
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-- 
trajce nikolov nick

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