[ptxdist] Docu for "fixup" rules

[ptxdist] Docu for "fixup" rules

[Ariel Garcia]

Hello,

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




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Re: [ptxdist] Docu for "fixup" rules

[Roland Hieber]

On Sat, Jun 13, 2020 at 01:01:39PM +0200, Ariel Garcia wrote:
> Hello,
> 
> 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 :)

 - Roland

-- 
Roland Hieber, Pengutronix e.K.          | r.hieber@pengutronix.de     |
Steuerwalder Str. 21                     | https://www.pengutronix.de/ |
31137 Hildesheim, Germany                | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686         | Fax:   +49-5121-206917-5555 |

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Re: [ptxdist] Docu for "fixup" rules

[Michael Olbrich]

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

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

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