Re: generating helpful message when an invalid target specified

[Stephan Beal]

On Sat, Aug 18, 2012 at 8:31 PM, Rakesh Sharma <address@hidden>wrote:

> then when an invalid target is specified, make should just run the "make
> help" target.
>

This isn't quite what you want but might still be useful:

########################################################################
# A simple help facility, taken from "Managing Projects with GNU Make,
# Third Edition":
.PHONY: list-targets
list-targets-noop:# don't ask
list-targets:
        @$(MAKE) --print-data-base --question list-targets-noop | \
      grep -v -e '^no-such-target' -e '^makefile' |      \
      awk '/^[^.%][-A-Za-z0-9_]*:/{ print substr($$1, 1, length($$1)-1) }'
|    \
        sort |                                             \
      pr --omit-pagination --columns=2


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----- stephan beal
http://wanderinghorse.net/home/stephan/
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