build-example may fail linking with glu 9.0.2

[zephvr]

Summary

With Mesa OpenGL utility library (GLU) version 9.0.2 installed, running make build-example can fail with error like undefined reference to symbol 'glEnd' or undefined reference to symbol 'glEnable'.

A complete output can be found here https://pastebin.com/ALfiRkw4

Details

This is an issue with glu version 9.0.2 and may affect different distributions (Archlinux in my case)

I added MAY because it only appear when building glu using meson and not make. Indeed while using meson the pkgconfig file generated is malformed and contains a Requires.private: opengl instead of Requires: opengl field. This lead to the command pkg-config --libs glu to ommit the -lGL argument. Hence a linking error.

This issue have already been fix on the glu repo with this commit We just have to wait for the next glu release.

Quick fix

A temporary fix while an official version is release is to edit Makefile.opengl and add a --static argument to pkg-config --libs glu commands

This gives: LDFLAGS += ${shell pkg-config --libs --static glu} -lglut

[Berlinuxer]

Hello, after i've edited the Makefile.opengl, i got the errormessages that ld cannot find -lGLU and -lglut. I am driving archlinux as well, and it is uptodate. Are there any other errors, or is it my linux, are there other packeges i need to install?

[doppioandante]

Hi, I got the same problem with the build-parts part of the make process. My system is Ubuntu 22.04 for reference. The fix I adopted was:

CPPFLAGS	+= ${shell pkg-config --cflags glu gl}
LDFLAGS 	+= ${shell pkg-config --libs glu gl} -lglut