Mercurial assumes that any system with XCode *installed* will use XCode to *build* Mercurial

[jdemeyer]

This is an except from upstream's setup.py:

if sys.platform == 'darwin' and os.path.exists('/usr/bin/xcodebuild'):
    # XCode 4.0 dropped support for ppc architecture, which is hardcoded in
    # distutils.sysconfig
    version = runcmd(['/usr/bin/xcodebuild', '-version'], {})[0].splitlines()[0]
    # Also parse only first digit, because 3.2.1 can't be parsed nicely
    if (version.startswith('Xcode') and
        StrictVersion(version.split()[1]) >= StrictVersion('4.0')):
        os.environ['ARCHFLAGS'] = '-arch i386 -arch x86_64'

The ARCHFLAGS are passed to gcc during the setup of Mercurial. This obviously breaks on a system with XCode installed, but where the "gcc" found in the PATH isn't XCode's gcc.

In later upstream releases, the last line is changed to

os.environ['ARCHFLAGS'] = ''

So I propose to backport this change.

spkg: ​http://boxen.math.washington.edu/home/jdemeyer/spkg/mercurial-1.8.4.p0.spkg

See #12570 for a follow-up.

[jdemeyer]

Diff for the mercurial spkg, for review only

[ohanar]

looks good, works good