[PHP-INSTALL] ./configure options for building php 5.5.21

What is the easiest why to get the configuration options that were used for a particular php package.  I’ve installed php by “yum install php55” - which installed 5.5.21; but I’d like to build a version of it with debug symbols etc but am not sure what the ./configure settings are to match the version that was installed.

Is there a resource that I can use or a command that can be run to view this?  I know that php –I works for versions that I’ve built because it shows the ./configure options used; but not when downloading the package.

Any ideas or links would be greatly appreciated.

Thanks – Bill