directory for the current build.info file and the corresponding build
directory, all relative to the top of the build tree.
-To begin with, things to be built are declared by setting specific
+'Configure' only knows inherently about the top build.info file. For
+any other directory that has one, further directories to look into
+must be indicated like this:
+
+ SUBDIRS=something someelse
+
+On to things to be built; they are declared by setting specific
variables:
PROGRAMS=foo bar