[Buildroot] [PATCH 1/8] core: add the possibility to provide help for local, custom rules
Yann E. MORIN
yann.morin.1998 at free.fr
Thu Mar 10 20:22:57 UTC 2016
Arnout, All,
On 2016-03-10 00:35 +0100, Arnout Vandecappelle spake thusly:
> On 03/09/16 23:22, Yann E. MORIN wrote:
> >When using a br2-external tree, it is possible (as stated in our manual)
> >to implement whatever arbitrary extra make rules (such as flashing a
> >board, or extracting the rootfs in an NFS export...). Some of those
> >extra rules might be exposed to the user as new entry points that the
> >user can call by itself.
> >
> >However, there is no way for the br2-external to advertise those new
> >rules in the help text.
> >
> >We add the possibility to do so, by adding a new make rule, called
> >help-local, advertised in our own help info.
> >
> >It is up to the br2-external tree to provide whatever help text is
> >deemed necessary.
> >
> >Note that we need to provide an empty, dummy help-local' rule, since it
> >is always advertised. Since this rule is empty, make gently reports that
> >there is "Nothing to be done for `help-local'", which is pretty well
> >fitting when help-local was not provided (either because there's no
> >br2-external tree, or when the br2-external tree does not provide it.
> >
> >Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> >Cc: Jérôme Pouiller <jezz at sysmic.org>
> >Cc: Arnout Vandecappelle <arnout at mind.be>
> >Cc: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
> >---
> > Makefile | 6 ++++++
> > 1 file changed, 6 insertions(+)
> >
> >diff --git a/Makefile b/Makefile
> >index f2822a2..d24793b 100644
> >--- a/Makefile
> >+++ b/Makefile
> >@@ -966,6 +966,7 @@ endif
> > @echo ' source-check - check selected packages for valid download URLs'
> > @echo ' external-deps - list external packages used'
> > @echo ' legal-info - generate info about license compliance'
> >+ @echo ' help-local - print help about local, custom actions (if any)'
> > @echo
> > @echo ' make V=0|1 - 0 => quiet build (default), 1 => verbose build'
> > @echo ' make O=dir - Locate all output files in "dir", including .config'
> >@@ -974,6 +975,11 @@ endif
> > @echo 'it on-line at http://buildroot.org/docs.html'
> > @echo
> >
> >+# This rule does nothing, it is expected to be overloaded by
> >+# a br2-external tree or a local.mk . However, it must exist,
> >+# as we reference it in the main help, above.
> >+help-local:
>
> It's sufficient and better to do
>
> .PHONY: help-local
I tried (evenm before I submitted!) and it does not work. It still
prints that there is nothing to do...
Here's my test case:
$ cat Makefile
.PHONY: help
help:
$ make help
make: Nothing to be done for `help'.
Regards,
Yann E. MORIN.
> (and then there is no need for a comment either).
>
> Regards,
> Arnout
>
> >+
> > list-defconfigs:
> > @echo 'Built-in configs:'
> > @$(foreach b, $(sort $(notdir $(wildcard $(TOPDIR)/configs/*_defconfig))), \
> >
>
>
> --
> Arnout Vandecappelle arnout at mind be
> Senior Embedded Software Architect +32-16-286500
> Essensium/Mind http://www.mind.be
> G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven
> LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
> GPG fingerprint: 7493 020B C7E3 8618 8DEC 222C 82EB F404 F9AC 0DDF
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