$FreeBSD$
This is an experimental build system. For details see http://www.crufty.net/sjg/docs/freebsd-meta-mode.htm. Build commands can be seen from the top-level with: .Dl make show-valid-targets The build is driven by dirdeps.mk using .Va DIRDEPS stored in Makefile.depend files found in each directory.

p The build can be started from anywhere, and behaves the same. The initial instance of .Xr make 1 recursively reads .Va DIRDEPS from Makefile.depend computing a graph of tree dependencies from the current origin. Setting .Va NO_DIRDEPS will skip checking dirdep dependencies and will only build in the current and child directories. .Va NO_DIRDEPS_BELOW will skip building any dirdeps and only build the current directory.

p This also utilizes the .Va WITH_META_MODE logic for incremental builds.

p The build will hide commands ran unless .Va NO_SILENT is defined.

p Note that there is currently no mass install feature for this.

p