#2180 Needs to link against -lGLX for newer Mesa versions

[John Paul Adrian Glaubitz]

On openSUSE Tumbleweed, which uses the latest upstream version of Mesa, the build fails with:

[  255s] /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld: ../src/arch/gtk3/libarch.a(opengl_renderer_unix.o): undefined reference to symbol 'glXQueryVersion'
[  255s] /usr/lib64/gcc/x86_64-suse-linux/15/../../../../x86_64-suse-linux/bin/ld: /usr/lib64/libGLX.so.0: error adding symbols: DSO missing from command line
[  255s] collect2: error: ld returned 1 exit status
[  255s] make[3]: *** [Makefile:1835: x64] Error 1

This is because the function glXQueryVersion is part of libGLX and the build system needs to include "-lGLX".

In openSUSE, we're currently using the following workaround in the spec file:

export LIBS="-lGLX"

I'm not 100% sure what the proper way of fixing this. Most likely configure.ac needs to be modified to include "LIBS = $LIBS $GLX_LIBS".

[gpz]

Which version of Mesa introduced that change?

And, not sure how to fix this either.... as long as the GHA builds work - i'd rather not touch the configure stuff right now shrug