OpenCPN Runs on Embedded ARM

[LeoA]

Freddie, you need to install libgles2-mesa-dev package

[akopac]

Could make that part of the script? If missing install...

[verkerkbr]

Simple Question ? In your log shows as a prompt bananapi/lemaker ? Are you running the Cubie with the Bananapi software ? Or are you compiling the Cubie software on a BananaPi ?

Regards,


Bram

[sbfreddie]

Originally Posted by LeoA

Freddie, you need to install libgles2-mesa-dev package

LeoA:
I tried installing libgles2-mesa-dev, but that did not fix the problem.
The problem remains, cannot find libEGL.

Thanks,
Freddie

[nohal]

Freddie...

sudo find / -name libEGL*

returns something?

Pavel

[sbfreddie]

Originally Posted by verkerkbr

Simple Question ? In your log shows as a prompt bananapi/lemaker ? Are you running the Cubie with the Bananapi software ? Or are you compiling the Cubie software on a BananaPi ?

Regards,


Bram

Bram:
I can understand how you or anyone else might be confused about what I am doing.
I now have a Bananapi-Pro and am trying to adapt my script (that was originally created for Qbee-X and Aruntu on the CubieTruck) to get OpenGL-ES2, OpenCPN, and OpenCPN plugins to work on the Bananapi-Pro (Lubuntu) the same way they do on the Cubie boards.

So far everything works except the OpenGL-ES2 install which is currently broke. But I think I may have an answer in a couple of days. Stand By!

Thanks,
Freddie

[sbfreddie]

Originally Posted by nohal

Freddie...

sudo find / -name libEGL*

returns something?

Pavel

Pavel:
Here is what the terminal says:

bananapi@lemaker:~$ sudo find  / -name libEGL
bananapi@lemaker:~$ 
bananapi@lemaker:~$ locate libEGL
/home/bananapi/Old_Mesa_Stuff/From_usr-lib-arm-linux-gnueabihf/mesa-egl/libEGL.so.1
/home/bananapi/Old_Mesa_Stuff/From_usr-lib-arm-linux-gnueabihf/mesa-egl/libEGL.so.1.0.0
/usr/lib/arm-linux-gnueabihf/libEGL.so
/usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so
bananapi@lemaker:~$

As you can see find did not find anything, but locate found libEGL.so in /usr/lib/arm-linux-gnueabihf/, and in /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.
However these are symbolic links that point to the mesa folder, which is the software emulated code for libEGL.
I think that the person that created this distribution did not build the user-land files for the Mali kernel modules.

I'm still digging!:bang head:

Thanks,
Freddie

[nohal]

Freddie...
Next time please run the command exactly as I posted it, it will actually return something...

Are you absolutely sure that the symlinks are correct?
If they are, I would also do

sudo ln -s /usr/lib/arm-linux-gnueabihf/libEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1
sudo ldconfig

And I suppose you are absolutely sure that /usr/lib/arm-linux-gnueabihf is in your /etc/ld.so.conf...

Pavel

[sbfreddie]

Originally Posted by nohal

Freddie...
Next time please run the command exactly as I posted it, it will actually return something...

Are you absolutely sure that the symlinks are correct?
If they are, I would also do

sudo ln -s /usr/lib/arm-linux-gnueabihf/libEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1
sudo ldconfig

And I suppose you are absolutely sure that /usr/lib/arm-linux-gnueabihf is in your /etc/ld.so.conf...

Pavel

Pavel:
Oops, Senior moment, I forgot the *. I guess I was in such a hurry, and I have five computers going all at once, please forgive this old fool.

I have decided to start with a fresh built, and back off on the over zealous removal of libs and Stuff.

Start from scratch.

Thanks,
Freddie

[sbfreddie]

Nohal:
OK, Starting with a freshly created Lubuntu (Ubuntu 14.04), I changed my script to not remove anything from the guts of this system, and then tried to build glshim from Sean's Github repository, and here is the results:

Now lets do cmake of glshim.....
Now lets build glshim.....
/home/bananapi/glshim/src/glx/glx.c: In function ‘xrefresh’:
/home/bananapi/glshim/src/glx/glx.c:158:11: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
     system("xrefresh");
           ^
/usr/bin/ld: cannot find -lEGL
collect2: error: ld returned 1 exit status
make[3]: *** [lib/libGL.so.1] Error 1
make[2]: *** [src/CMakeFiles/GL.dir/all] Error 2
make[1]: *** [src/CMakeFiles/GL.dir/rule] Error 2
make: *** [GL] Error 2
Building of glshim failed.....
 more information on errors refer to the log file in the build directory.

So I tried to find libEGL with your command:

bananapi@lemaker:~$ sudo find / -name libEGL*
/usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1.0.0
/usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1

I also checked to see if /arm-linux-gnueabihf/ was in the /etc/ld.so.conf folder and here it is, its called arm-linux-gnueabihf.conf and this is what's inside:

# Multiarch support
/lib/arm-linux-gnueabihf
/usr/lib/arm-linux-gnueabihf

Do you still recommend I put a symlink somewhere like this:
sudo ln -s /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1 /usr/lib/arm-linux-gnueabihf/libEGL.so.1
to let glshim find it easier?

Thanks,
Freddie

[nohal]

I would just add /usr/lib/arm-linux-gnueabihf/mesa-egl into ld.so.conf and rerun ldconfig


Sent from my iPhone using Cruisers Sailing Forum

[sbfreddie]

Nohal:
I tried to install a symlink in /usr/lib/arm-linux-gnueabihf/ with this command:

ln -s /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1 /usr/lib/arm-linux-gnueabihf/libEGL.so.1.

This resulted in the same error, glshim linker still cannot find lEGL.

Any other suggestions?

Thanks,
Freddie

[sbfreddie]

Originally Posted by nohal

I would just add /usr/lib/arm-linux-gnueabihf/mesa-egl into ld.so.conf and rerun ldconfig


Sent from my iPhone using Cruisers Sailing Forum

Nohal:

Tried your suggestion and still get the same results:

Now lets do cmake of glshim.....
Now lets build glshim.....
/home/bananapi/glshim/src/glx/glx.c: In function ‘xrefresh’:
/home/bananapi/glshim/src/glx/glx.c:158:11: warning: ignoring return value of ‘system’, declared with attribute warn_unused_result [-Wunused-result]
     system("xrefresh");
           ^
/usr/bin/ld: cannot find -lEGL
collect2: error: ld returned 1 exit status
make[3]: *** [lib/libGL.so.1] Error 1
make[2]: *** [src/CMakeFiles/GL.dir/all] Error 2
make[1]: *** [src/CMakeFiles/GL.dir/rule] Error 2
make: *** [GL] Error 2
Building of glshim failed.....
 more information on errors refer to the log file in the build directory.

I'm going over to Cubie to find what is located where on my CubieTruck.

Any other suggestion?

Thanks,
Freddie

[nohal]

Yes, of course...

sudo ln -s /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1 /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so

[sbfreddie]

Originally Posted by nohal

Yes, of course...

sudo ln -s /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so.1 /usr/lib/arm-linux-gnueabihf/mesa-egl/libEGL.so

Nohal:
Never mind I found the problem, it seems I was right in the first instance. The User Space drivers have not been installed into this distribution, that why glshim can't find what it wants.
I looked in my CubieTruck to see what I could find, and lo and behold here is what I found:
libEGL.so -> libEGL.so.1 -> libEGL.so.1.1.2 which is a symlink to libMali.
That's why glshim fails, because libEGL.so is missing because its put there during the build process of installing the user-space drivers, see this link:Mali binary driver - linux-sunxi.org

So I will get to work adding this work to my build script.

Thanks very much for all you great help!
Freddie