Swift/Mac: OpenGL.framework when using clang modules about glew HOT 11 CLOSED

Ideally we'd simply skip glu.h for Swift, as we already do for iOS...
Any suggestions for some preprocessor logic?

#ifndef GLEW_NO_GLU
#  ifdef __APPLE__
#    include <Availability.h>
#    if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)
#      define GLEW_NO_GLU
#    endif
#  endif
#endif

#ifndef GLEW_NO_GLU
/* this is where we can safely include GLU */
#  if defined(__APPLE__) && defined(__MACH__)
#    include <OpenGL/glu.h>
#  else
#    include <GL/glu.h>
#  endif
#endif

from glew.

I'd recommend using -DGLEW_NO_GLU for Swift, for sure.

from glew.

It's not just Swift. It's anything using clang modules on Apple. So everything Xcode too. It probably never came up before since you just "import OpenGL" in Xcode so why bother with GLEW. Which is the answer on Q&A sites.

You can't -D with the open source Swift right now. Really. The Swift package manager is very anemic. I do have GLEW working with glu and I'm hoping new Swift features will let me do something less fragile in the future. But maybe we can fix it up for everyone using modules in other languages too.

The issue is I don't know why glu is loaded so early. I assume for some platform I'm not familiar with. If that's not the case, glu can be moved to the very end of GLEW.h so it's painless everywhere. Or maybe just for Apple it's at the end. Doing Apple at the end works in my tests.

If you don't see a problem with doing Apple at the end, I can send a patch. I can also move all glu to the end. Probably easier to maintain all glu in one place. But not if it blows up some other platform.

from glew.

GLEW itself doesn't need glu.h. It's only there to maintain compatibility with applications that depend on GLU via glew.h. Isn't GLU deprecated on the Mac nowadays?

from glew.

Oh, we're dealing in pre-compiled headers here? Ouch!

from glew.

Ouch indeed. include <OpenGL/glu.h> is converted by clang into import OpenGL.GL.GLU which triggers a full pre-compiled header load of everything in OpenGL. It's all fine if you load glu at the end though.

GLEW has been broken in XCode since version 5 because of this. That's when Apple enabled clang modules.

from glew.

I have not touched XCode much since the clang migration, I guess. GNU make works just fine, of course. :-)

from glew.

Is AE9RB/SwiftCGLEW abandoned at this point? I'm reading up about Swift, especially because there is a Linux version. But I'm still not sure what all the fuss is about.

from glew.

More problems came up the further I progressed. It got to where I had to fully parse gl.xml. At that point it was easy to do everything in Swift with no dependency on C code.
https://github.com/AE9RB/SwiftGL

I don't know what everyone else is doing in Swift. But it seems to me like a good language for 3D programming. Modern syntax. Fast and easy C calls. No indeterminate delays from a GC.

from glew.

At my workplace it's all about Julia, so Swift is probably not going to be on my radar, so much.

from glew.

Nothing further for this, for now.

from glew.