Problem with Raspberry PI 2 and Raspbian 11 (bullseye) about rpi-opengl-without-x HOT 2 CLOSED

I've just installed a lite "bullseyes" on a raspberry pi Zero 2 W, as I wanted to try out a setup with displaying OpenGL shaders to a led-matrix display.

After a fresh installed system you'll not have all the required drivers in place, but you can easily build them:

> git clone https://github.com/raspberrypi/userland.git
> cd userland
> sudo ./buildme

after this you'll have all the required and proper libs in place:

> ls /opt/vc/lib
libEGL.so        libGLESv2.so        libWFC.so       libbrcmGLESv2.so  libcontainers.so       libdtovl.so         libkhrn_static.a       libmmal_core.so       libopenmaxil.so  libvcilcs.a  pkgconfig
libEGL_static.a  libGLESv2_static.a  libbcm_host.so  libbrcmOpenVG.so  libdebug_sym.so        libelftoolchain.so  libmmal.so             libmmal_util.so       libvchiq_arm.so  libvcos.so   plugins
libGLESv1_CM.so  libOpenVG.so        libbrcmEGL.so  ...

switching between lbrcmGLESv2 and lGLESv2 doesn't make any difference for me, both works completely fine 🤔

from rpi-opengl-without-x.

Thank you, Michal!
That was the missing link. For anyone reading this: after building userland, the files were available and compiling worked but I got another error:
./triangle: error while loading shared libraries: libbrcmEGL.so: cannot open shared object file: No such file or directory
I missed to set LD_LIBRARY_PATH so to solve it I just had to set:
LD_LIBRARY_PATH=/opt/vc/lib

from rpi-opengl-without-x.