Re: [ptxdist] Docu for "fixup" rules

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Mon, Jun 15, 2020 at 10:57:40AM +0200, Roland Hieber wrote:
> On Sat, Jun 13, 2020 at 01:01:39PM +0200, Ariel Garcia wrote:
> > using the hint from this discussion
> > 	https://www.mail-archive.com/ptxdist@pengutronix.de/msg16103.html
> > 
> > i would like to add a "rules/post/kernel-fixup.make"
> > kind of rule file to "extend" the rule run when i execute
> > 	ptxdist clean kernel
> > 
> > But i don't find any info regarding pre/post rule files in the official docu/
> > reference manual.
> > 
> > Any hint is really appreciated, thanks, Ariel
> 
> The makefiles in rules/pre are evaluated before any other in rules/, and
> contain all macro and variable definitions that should be available for
> rule files.
> 
> The files in rules/post are evaluated last, so you can e.g.  override
> makefiles and menu entries from upstream PTXdist in your BSP without
> needing to forking the whole rule file.
> 
> All files are evaluated in lexical order, but other than that, the file
> name is not important for functionality.
> 
> I don't think there's any more magic to it :)

Also, this is pure make, so the you can only do, what is supported by the
make syntax.

'ptxdist clean kernel' is defined by a make target and those cannot be
extended and overwriting produces a warning.
So in this case you need to copy rules/kernel.make into your BSP and modify
it. This will replace the on in PTXdist and avoid this warning.

Michael

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