project.mk - one-makefile build system
(c) 2009 - 2011 Tom Schouten


The build system uses the following principles:

    * One (1!) makefile to build everything.  This means that all
      dependencies are expressed in a single place, and no recursive
      calls to make itself are necessary or even possible.

    * Modular: while there is only a single makefile, it is possible
      to have per-directory modules.


Module variables all start with "m"

- provided by user in module.mk
$(m_target)   module's build target (library or executable)
$(m_obj)      list of binary objects that will be collected in the final target

- usable in module.mk, provided by system
$(m_name)     module name (relative directory to project.mk)
$(m_src)      module's source directory
$(m_build)    module's build directory