Bug#760865: calibre: FTBFS on mips: thread.error: can't start new thread

[Emilio Pozuelo Monfort <pochu@debian.org>]

Source: calibre
Version: 2.0.0+dfsg-1
Severity: serious

Your package has failed to build on mips since version 2.0.0:

####### Building extension freetype #######
Compiling freetype
Traceback (most recent call last):
  File "setup.py", line 99, in <module>
    sys.exit(main())
  File "setup.py", line 85, in main
    command.run_all(opts)
  File "/«BUILDDIR»/calibre-2.2.0+dfsg/setup/__init__.py", line 181, in run_all
    self.run_cmd(self, opts)
  File "/«BUILDDIR»/calibre-2.2.0+dfsg/setup/__init__.py", line 178, in run_cmd
    cmd.run(opts)
  File "/«BUILDDIR»/calibre-2.2.0+dfsg/setup/extensions.py", line 397, in run
    self.build(ext, dest)
  File "/«BUILDDIR»/calibre-2.2.0+dfsg/setup/extensions.py", line 441, in build
    if not parallel_build(jobs, self.info):
  File "/«BUILDDIR»/calibre-2.2.0+dfsg/setup/parallel_build.py", line 32, in parallel_build
    p = Pool(cpu_count)
  File "/usr/lib/python2.7/multiprocessing/dummy/__init__.py", line 151, in Pool
    return ThreadPool(processes, initializer, initargs)
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 718, in __init__
    Pool.__init__(self, processes, initializer, initargs)
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 159, in __init__
    self._repopulate_pool()
  File "/usr/lib/python2.7/multiprocessing/pool.py", line 223, in _repopulate_pool
    w.start()
  File "/usr/lib/python2.7/multiprocessing/dummy/__init__.py", line 75, in start
    threading.Thread.start(self)
  File "/usr/lib/python2.7/threading.py", line 745, in start
    _start_new_thread(self.__bootstrap, ())
thread.error: can't start new thread
make: *** [common-build-arch] Error 1
debian/rules:14: recipe for target 'common-build-arch' failed
dpkg-buildpackage: error: debian/rules build-arch gave error exit status 2

Full logs at:

https://buildd.debian.org/status/logs.php?pkg=calibre&arch=mips