1 # $NetBSD: opt.mk,v 1.6 2020/11/18 01:06:59 sjg Exp $
3 # Tests for the command line options.
5 .MAKEFLAGS: -d0 # make stdout line-buffered
8 # The options from the top-level make are passed to the sub-makes via
9 # the environment variable MAKEFLAGS. This is where the " -r -k -d 0"
10 # comes from. See MainParseArg.
11 ${MAKE} -r -f /dev/null -V MAKEFLAGS
14 # Just to see how the custom argument parsing code reacts to a syntax
15 # error. The colon is used in the options string, marking an option
16 # that takes arguments. It is not an option by itself, though.
20 # See whether a '--' stops handling of command line options, like in
21 # standard getopt programs. Yes, it does, and it treats the
22 # second '-f' as a target to be created.
23 ${MAKE} -r -f /dev/null -- -VAR=value -f /dev/null
26 # This is the normal way to print the usage of a command.