AstUnicall for Asterisk 1.4.21.2 is now available in downloads.
This is just a refresh working with the latest versions of all the libraries.
Tzafrir sent me a package with the Unicall driver and a Makefile just to compile it without patching Asterisk Makefile. From now on I will keep updating 2 packages:
1. astunicall, that is, the package with all the required libraries.
2. chan-unicall, a package with the chan unicall driver only, you must have already installed all the library dependencies.