[Buildroot] [PATCH next v6 07/10] core: implement per-package SDK and target

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2018-12-26 18:34 +0100, Thomas Petazzoni spake thusly:
> On Thu, 6 Dec 2018 11:21:25 +0100, Andreas Naumann wrote:
> > Just to make sure I just did the above using your ppsh-v6 branch with 
> > the wandboard_defconfig. The only additional change was to use the 
> > external linaro toolchain. After 'make'
> >    $ readelf -d output/host/sbin/mkfs.ext3
> > shows
> >    0x000000000000001d (RUNPATH)            Bibliothek runpath: 
> > [/local/gsrc/buildroot.upstream/output/per-package/host-e2fsprogs/host/lib]
[--SNIP--]
> OK, so I investigated this issue, and now I understand where it comes
> from, but I'm not yet sure how to fix it properly.
[--SNIP--]
> Now, with per-package directory enabled, the RPATH of binaries when
> building looks like this:
>   Library rpath: [/home/thomas/projets/buildroot/output/per-package/host-e2fsprogs/host/lib]
> 
> So it is no longer within the ROOTDIR passed as patchelf's
> --make-rpath-relative argument.
[--SNIP--]
> At this point, I am not sure at which level and how the issue should be
> fixed. Needs some thought. Input/ideas welcome.

Well, one obvious suggestion would be to run patchelf after the
installation of each package, and scan the package-file-0list to limit
ourselves to the files the current package just installed (to avoid
re-patchelf-ing what has already been patchelf-ed).

That way, we know at that time what the host dir is, and we can tweak it
appropriately.

Regards,
Yann E. MORIN.

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