29 lines
922 B
Makefile
29 lines
922 B
Makefile
# $NetBSD: opt.mk,v 1.7 2023/02/25 00:07:08 rillig Exp $
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#
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# Tests for the command line options.
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.MAKEFLAGS: -d0 # make stdout line-buffered
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all: .IGNORE
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# The options from the top-level make are passed to the sub-makes via
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# the environment variable MAKEFLAGS. This is where the " -r -k -d 0"
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# comes from. See MainParseOption.
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${MAKE} -r -f /dev/null -V MAKEFLAGS
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@echo
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# Just to see how the custom argument parsing code reacts to a syntax
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# error. The colon is used in the options string, marking an option
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# that takes arguments. It is not an option by itself, though.
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${MAKE} -:
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@echo
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# See whether a '--' stops handling of command line options, like in
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# standard getopt programs. Yes, it does, and it treats the
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# second '-f' as a target to be created.
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${MAKE} -r -f /dev/null -- -VAR=value -f /dev/null
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@echo
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# This is the normal way to print the usage of a command.
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${MAKE} -?
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@echo
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