On Mon, 31 May 2021, Quentin Schulz wrote:
> Hi Robert,
>
> On Fri, May 28, 2021 at 05:02:13PM -0400, Robert P. J. Day wrote:
> > On Fri, 28 May 2021, Quentin Schulz wrote:
> >
> > ... big snip ...
> >
> > > ${B} = ${S} by default, so that might explain why it works without
> > > externalsrc being inherited.
> > >
> > > You can see in the makefile that this is assumed. Only the install tasks
> > > are installing somewhere else (DESTDIR), c.f.
> > > https://git.savannah.nongnu.org/cgit/dmidecode.git/tree/Makefile
> > >
> > > So yes, except if you patch the Makefile to support out-of-tree build,
> > > you would need both EXTERNALSRC and EXTERNALSRC_BUILD set to the same
> > > value.
> > >
> > > Maybe a Cmake example would suit better since B is set to
> > > "${WORKDIR}/build"
> > > by default?
> > >
> > > Otherwise, write a proper Makefile that allows out-of-tree builds for
> > > the example :)
> >
> > in the end, i suspect i was overthinking it, thinking somehow there
> > was some magic to "externalsrc", only to finally realize it was
> > totally inappropriate for source that had to be built in-tree. so i
> > just switched over to using SRC_URI and, for various recipes like
> > dmidecode, i created a recipe that started with some variation of:
> >
> > LICENSE = "CLOSED"
> > LIC_FILES_CHKSUM = ""
> > FILESEXTRAPATHS_prepend := "${THISDIR}:"
> > SRC_URI := "file://src"
>
> No need for := here, a simple = should suffice?
yup, i already simplified that, even though it doesn't hurt
anything.
> > S = "${WORKDIR}/src"
> >
>
> Why not put the sources in:
> meta-mylayer/recipes-test/test/my-test-0.1/src/
> meta-mylayer/recipes-test/test/my-test_0.1.bb
>
> and have SRC_URI = "file://src/" without needing to add
> FILESEXTRAPATHS_prepend := "${THISDIR}:" so that it follows what
> almost every recipe does?
>
> S will be as you wrote above.
i know it looks goofy, but these recipes are just meant to be
templates to show other developers what a normal Makefile-based recipe
will look like, and if they have their source elsewhere, they'll have
to set FILESEXTRAPATHS anyway. i was grappling with how to do this,
but this is not meant to be production-level, it's just for people to
see how to structure their code so it follows the OE model. i might
re-do it.
> I thought you were trying to find an example with externalsrc for
> our docs, but it seems you have a different thing in mind, can you
> tell us so we are able to help you with your actual issue/question
> :) ?
externalsrc turned out to have the fatal flaw that it doesn't scale
well for source that can't be built out-of-tree.
rday
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