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< default='fast',
---
> default='opt',
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> optparser.add_option('-j', '--jobs', type='int', default=1,
> help='number of parallel jobs to use')
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< system('scons %s %s' % (options.scons_opts, ' '.join(targets)))
---
> scons_opts = options.scons_opts
> if options.jobs != 1:
> scons_opts += ' -j %d' % options.jobs
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> system('scons %s %s' % (scons_opts, ' '.join(targets)))
>