[MacPorts] #35982: qt4-mac & Qt4 portgroup: clang spec for qmake

[MacPorts]

#35982: qt4-mac & Qt4 portgroup: clang spec for qmake
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  Reporter:  mojca.miklavec.lists@…  |      Owner:  macports-tickets@…
      Type:  defect                  |     Status:  new
  Priority:  Normal                  |  Milestone:
 Component:  ports                   |    Version:
Resolution:                          |   Keywords:
      Port:  qt4-mac                 |
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Comment (by mojca@…):

 The main "problem" is that programs using qmake don't respect MacPorts'
 compiler settings. There is no special need to actually provide the spec
 file, but I thought that this would be the easiest solution. The file
 {{{/opt/local/share/qt4/mkspecs/macx-llvm/qmake.conf}}} is very short and
 simple (ok, I don't understand what all those compiler flags mean). It
 includes a couple of other conf files (like {{{common/llvm.conf}}}), but
 all of them are relatively straightforward.

 I just checked the sources though (see r97316). It seems that Ryan added
 {{{reinplace}}} on the generated Makefile to fix the choice of the
 compiler:
 {{{
 post-configure {
     # For some reason the Makefile qmake generates hardcodes the compiler
     # that qt4-mac was made with as the one used to build lionsupport.o.
     # Replace it with $(CC) which we set up for the correct compiler and
     # -arch flags with the build.args below.
     reinplace -E "/-o
 build\\/lionsupport.o/s/^(\[\[:space:\]\]+)\[^\[:space:\]\]+/\\1\\$\\(CC\\)/"
 ${worksrcpath}/Makefile
 }
 }}}
 (To explain the ''For some reason'': qmake always hardcodes the compiler.
 Compiler can be switched by using a different spec file, but there might
 be other options I'm not aware of.)

 Given that a workaround has been found, that version 5 with a fix is out
 and if no other ports have a problem with this, maybe you could close the
 ticket as "won't fix".

-- 
Ticket URL: <https://trac.macports.org/ticket/35982#comment:3>
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