2 Enable building in meta mode.
3 This is an experimental build feature.
5 http://www.crufty.net/sjg/docs/freebsd-meta-mode.htm.
7 The build is driven by dirdeps.mk using
10 Makefile.depend files found in each directory.
12 The build can be started from anywhere, and behaves the same.
13 The initial instance of
18 computing a graph of tree dependencies from the current origin.
21 will skip checking dirdep dependencies and will only build in the current
24 As each target is made
26 produces a meta file which is used to capture (and compare)
28 as well as any command output.
31 is available the meta file will also capture a record of files
32 used to produce the target by tracking syscalls.
34 The build will hide commands ran unless