we plan to merge libfwbuilder and fwbuilder packages into one "fwbuilder" package to simplify package management and make installation easier for the users. Libfwbuilder will become a directory inside fwbuilder code tree and all executables will link with it statically. This reduces number of files we install in different parts of the file system and makes it easier for the users to both build from source and to install binary packages. The change is planned to go live in the next release of fwbuilder tentatively numbered "4.2" some time in the next month or two.
The change only affects our Linux and FreeBSD/OpenBSD packages.
The side effect of this change is that we won't install header files and dynamic libraries and won't make libfwbuilder-devel package anymore.
Please let me know asap if you have any code that depends on these files or know of a project that does.