[kde-freebsd] [Bug 195105] devel/qt5 cannot find GL/gl.h with Clang

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195105

--- Comment #9 from commit-hook at freebsd.org ---
A commit references this bug:

Author: rakuco
Date: Wed Dec 30 14:03:43 UTC 2015
New revision: 404856
URL: https://svnweb.freebsd.org/changeset/ports/404856

Log:
  qmake5: Set QMAKE_{INC,LIB}DIR_OPENGL.

  Follow-up to r404694. When we stopped setting CPATH and LIBRARY_PATH, some
  Qt5-based ports (astro/stellarium, audio/musescore, audio/cantata,
  irc/quassel, deskutils/owncloudclient) broke because the QtGui headers end
  up bringing in GL/gl.h, but -I/usr/local/include was no longer being passed
  to the compiler.

  This is generally caused by QMAKE_{INC,LIB}DIR_OPENGL being empty, which
  leads to some parts of Qt5ConfigExtras.cmake.in being left out when being
  processed into Qt5ConfigExtras.cmake. Specifically, the bits of code that
  make the directories containing GL/gl.h and libGL.so a dependency of the
  Qt5::Gui CMake target were not present.

  Fix it by setting those two variables again like we also do in devel/qmake4.

  Most ports broken by r404694 are fixed by this change, but not all:
  * audio/cantata: Accidentally fixed by this change. Upstream includes the
    TagLib headers wrongly. `taglib-config --cflags' returns
    -I${LOCALBASE}/include/taglib, but the code references headers as
    <taglib/foo.h> instead of <foo.h>.
  * multimedia/obs-studio, textproc/sigil, x11/antimicro: Those remain broken,
    linker calls pass -lfoo instead of /path/to/libfoo.so, and they were only
    working because we were passing LIBRARY_PATH to the linker before. They
    need to be fixed separately.

  Thanks to antoine@ for the fallout heads-up.

  PR:   194088
  PR:   195105
  PR:   198720
  MFH:  2015Q4

Changes:
  head/devel/qmake5/Makefile
  head/devel/qmake5/files/patch-mkspecs__common__freebsd.conf
  head/x11-toolkits/qt5-gui/Makefile

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