When invoked with no arguments in a directory containing an
Imakefile, the imake program is run with arguments appropriate
for your system (configured into xmkmf when X was built) and
generates a Makefile. When invoked with the -a option, xmkmf
builds the Makefile in the current directory, and then
automatically executes ``make Makefiles'' (in case there are
subdirectories), ``make includes'', and ``make depend'' for you.
This is the normal way to configure software that is outside the
X Consortium build tree. If working inside the X Consortium
build tree (unlikely unless you are an X developer, and even
then this option is never really used), the topdir argument
should be specified as the relative pathname from the current
directory to the top of the build tree. Optionally, curdir may
be specified as a relative pathname from the top of the build
tree to the current directory. It is necessary to supply curdir
if the current directory has subdirectories, or the Makefile
will not be able to build the subdirecto