Hello,
I've managed to get Qt 5.3 to build on OS X 10.6 and adapt my qt5-mac-devel
Portfile for that. No small feat, as this is not officially supported by Digia.
Main issue here: the system compilers on 10.6 (*gcc-4.2, and clang from Xcode
3.2 as well as Xcode 4.2) are incapable of building Qt 5.3 and care must thus
be taken not to use them accidentally.
This requires a modern version of clang, and in order to avoid ending up with a
hard-wired clang version dependency my current approach instructs the user to
use `port select` (or equivalent). The actual requirement is to have a modern
compiler in the path (I've only tested with clang because that's what Qt 5.3
builds with on supported OS X versions). My own requirement is that there be no
version information in the compiler name, in order to avoid said hard-wired
dependencies and unnecessary rebuilds.
I caught flak on my trac ticket for "requiring" port select, despite IMHO
conforming to its intended use, i.e. user convenience. This requirement takes
the form of testing for ${prefix}/bin/clang{,++} and aborting with instructions
if those items are missing. Those would normally be one-time instructions, of
course.
What other approaches are there? I can only see a few
- Change the rewriting of several Qt build script/config files so that they
don't contain a full path to ${prefix}/bin/clang{,++}, presume that
${prefix}/bin will always and reliably be first in the path, and cross eyes,
fingers and toes that everything builds correctly. Qt and Qt applications
alike.
- Hack the build system even more in order to provide a Qt-specific equivalent
for the port select mechanism.
- Drop the idea of supporting OS X 10.6 in an official port
If I'm missing something obvious and more elegant than asking the user to use
`port select` I'd love to hear about it, but as things stand I think it's the
best compromise that doesn't even violate official dogma.
BTW, it would also be about time to publish this port (and qt4-mac) so that
more users can start installing and testing Qt4 and Qt5 applications alongside.
The current port directory:
https://trac.macports.org/attachment/ticket/46536/port%3Dqt5-mac-devel.tar.bz2
R.
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