[php-pecl-apcu/f18] (5 commits) ...restore APC serializers ABI (patch merged upstream)

[Remi Collet]

Summary of changes:

  0ac6710... fix macro (*)
  53602cc... need pcre-devel (*)
  3f0c247... adapt for SCL (*)
  6459e4d... adapt for SCL (*)
  56aa913... restore APC serializers ABI (patch merged upstream) (*)

(*) This commit already existed in another branch; no separate mail sent