macos: homebrew is not supported

[dk]

refs: dk/Prima-OpenGL#8

Hello,

My Prima::OpenGL is caught between Prima's way to pick up libraries using pkg-config, and hardcoded paths of OpenGL.

Since there are so many libraries that do not come with native xcode, Prima prefers to use pkg-config everywhere, also on MacOSX, which is provided by homebrew. Homebrew also provides libX11 etc libraries that are not compatible with native ones from /opt/X11/lib. If one builds an application that is linked with both, there occur all kinds of strange effects, including coredumps.

I tried to hack around Makefile.PL but couldn't get far:

1. glversion.c coredumps if compiled with both AGL,OpenGL, and glut, so disabling the 2 first works, kind of:
   delete @$found_libs{qw(GL GLU AGL)} if $interface_lib eq 'FREEGLUT';
2. after that, there are compile errors like this:

cc -c  -I/opt/homebrew/include -I/usr/X11R6/include -I/opt/X11/include -I. -g -pipe -fno-strict-aliasing -fstack-protector-strong -DPERL_USE_SAFE_PUTENV -Wno-error=implicit-function-declaration -Os  -DVERSION=\"0.7101\" -DXS_VERSION=\"0.7101\"  -iwithsysroot "/System/Library/Perl/5.34/darwin-thread-multi-2level/CORE"  -DHAVE_VER -DHAVE_FREEGLUT -Wno-deprecated-declarations -DHAVE_GLX -DHAVE_FREEGLUT -DHAVE_FREEGLUT_H -DGL_GLEXT_LEGACY lib/OpenGL/Array.c -o lib/OpenGL/Array.o
lib/OpenGL/Array.xs:24:1: error: unknown type name 'GLint'
   24 | GLint FBO_MAX = -1;

at which point I stopped because I couldn't pinpoint the problem quickly.

Anyway, you're welcome to test it with homebrew, Prima, and Prima-OpenGL.

[mohawk2]

All my testing with and without FreeGLUT has been with Homebrew, which by itself worked. The problem you are reporting is the C compiler not knowing the type GLint, which can only happen if it didn't find the GL headers.

Therefore, the problem as described does not exist, and is not an accurate description of the problem you are reporting.

[dk]

Interesting, because Makefile.PL doesn't have /opt/homebrew/ in its hardcoded paths. How can I run it so that homebrew is picked up?

[dk]

Also I don't think that "it didn't find the GL headers" is a correct assumption. The C compiler didn't complain about missing headers, as you can see.

Anyways, if you don't feel to be cooperative on this, this is fine with me. I'd be happy to run code for you to test on my setup, but I'm not going to argue about the semantics if the problem exists or not.

[mohawk2]

@dk My recommendation for what I believe is your situation (getting Perl OpenGL working under Prima and Prima::OpenGL) would be to use OpenGL::Modern. I believe you are already pursuing this with Perl-GPU/OpenGL-Modern#67 and Perl-GPU/OpenGL-Modern#68 (sorry, not had capacity to look at them recently, but I will) - if you agree, are you happy to close this issue since the situation has moved on?