QGLE @4.2.5_12: fatal error: 'glu.h' file not found

[majoc-at-astro (majoc-at-astro)]

Please see enclosed build log, produced by port -v install qgle on an otherwise-empty MacPorts installation, in which the punchline is:

3dviewer.cpp:30:10: fatal error: 'glu.h' file not found

The same port builds fine on our 10.12 and 10.13 builders. Trivial tests suggest this is because the headers have been moved from /System/Libraries into /Applications/Xcode.app/Contents/Developer (apologies: the correct terminology escapes me).

I have a truly horrible patch which uses <GL/glu.h> and port:libGLU, but this has the fails-to-fail nature. I'll sketch out a possible plan of attack in a followup submission.

Xcode 10.2.1

• Xcode: Build version 10E1001
• clang: Apple LLVM version 10.0.1 (clang-1001.0.46.4)

[majoc-at-astro (majoc-at-astro)]

Further experimentation with trivial CPP files at the command line suggests that the true fix would be to replace:

-I/System/Library/Frameworks/OpenGL.framework/Headers

.... with:

-iwithsysroot /System/Library/Frameworks/OpenGL.framework/Headers

.... which makes use of the -isysroot/ phrase. (The AGL.framework header-inclusion phrase may need similar treatment, though I haven't tested that.)

Methinks this headers-in-Xcode (headers-under-sysroot?) problem will turn up in other places (eg ticket:58378). I leave it to those who understand these things better to ascertain whether this needs to go in individual ports, into a portgroup, or both. Apologies for not being able to submit a known-working patchset for myself: it's taken me a week to get this far, and I'm out of oomph. Hope this helps.

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #60789.