Latest automake will detect then warn if the Makefile uses source
files that are in subdirectories, but the subdirs option is not
set. In the FreeSWITCH build system the current expected behavior is
to expect the subdirs option to be enabled.
FS-7122 #resolve
The latter is a well known automake variable, used
to set (per-Makefile) automake options and supported
since the beginning of time (= automake 1.4).
The former is a made-up variable that doesn't really
do anything.
Signed-off-by: Stefan Knoblich <stkn@openisdn.net>
