Hi,
I am from IBM. I maintain the PHP modules/drivers for IBM databases(DB2, informix). ex: ibm_db2, pdo_db2, pdo_informix. Curently we maintain these modules in PECL site.
These modules are written in C and in-turn depend on the installation of the IBM ODBC Driver.

Now we are thinking of making these PHP extensions composer ready. All the existing composer ready packages and documentation talks about modules written entirely in PHP.

Can you help us with the steps or documentation or examples to make our modules written in C composer ready.