Process Control support Formula was removed
Last version was
php54-pcntl requires the following formulae to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

Mike McQuaid Deprecate tap.
ilovezfs php54-pcntl: bottle revision to rebuild.
Andy Blyler Revert "php 5.5.34"
Andy Blyler php 5.5.34
Andreas Braun Add description for pcntl formula

Formula code at GitHub