ignore exe on cygwin, ignore tmp files in test
test7 .POSIX special target
using FreeBSD mkdep
added some POSIX default rules, WIP
handle -p option
rename req -> req_t, indent target.c & var.c
renamed var -> var_t, moved sm_opts to sm_opts.h
drop sm_opts.h
fix bug in target.c
don't build with -p
cmd line arg: -e
handle option -r
options: -k -S -s
fixed bug test4
options: -i -n
multi-target, test13
.IGNORE .SILENT
small fixes
test18: single suffix rule .c
option: -t