Some extensions may require additional Makefile or config.m4 code that can't be created by PECL_Gen.

Makefile code can be added using a <makefile> tag within <deps> section. The tag data is written to a Makefile.fragment file and registered within config.m4.

Additions to config.m4 itself can be put into a <configm4> tag within <deps>. You can control whether the code is put near the beginning or the end of config.m4 using the position=top or position=bottom attribute.