The QMAKE_COMPILER_DEFINES are used when running moc. In some cases, Qt
checks the __GNUC__ value to determine which version of GCC is being
used. In particular, the qtconcurrentfilter and qtconcurrentmap tests
fail to compile because moc ends up defining QT_NO_CONCURRENT_FILTER and
QT_NO_CONCURRENT_MAP since the condition __GNUC__ < 4 evaluates to true.
The Mac OS X development tools have not used gcc 3.x is a very long
time. The current version ships with llvm-gcc-4.2.1 and clang (which
also masquerades as gcc 4.2.1). Defining __GNUC__=4 makes sure that moc
preprocesses headers in the same way the compiler does.
Change-Id: Ie491d3f5b074fd1a509ffe6755f3308836817b6c
Reviewed-by: João Abecasis <joao.abecasis@nokia.com>
This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:
http://qt.gitorious.org/qt/pages/GitIntroductionWithQt
If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.
Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
