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SubjectRe: [PATCH v4] config: Allow kernel installation packaging to override pkg-config
On Tue, Mar 8, 2022 at 7:50 AM Chun-Tse Shao <ctshao@google.com> wrote:
>
> On Mon, Mar 07, 2022 at 10:17:17AM -0800, Nick Desaulniers wrote:
> > On Sun, Mar 6, 2022 at 2:39 PM Chun-Tse Shao <ctshao@google.com> wrote:
> > >
> > > Add HOSTPKG_CONFIG to allow tooling that builds the kernel to override
> > > what pkg-config and parameters are used.
> >
> > Sorry, kind a late thought here for v4, but we don't seem to prefix
> > many other host side tools with HOST_, i.e. LEX, YACC, AWK, PERL,
> > PYTHON3, etc. Maybe just having the variable identifier be simply
> > PKGCONFIG rather than HOSTPKG_CONFIG then put it at the end of the
> > list in the top level Makefile after ZSTD (i.e. the list of host
> > tools)? There's HOST_ prefixes when there's more than one tool
> > involved (i.e. host compiler vs target compiler), but I suspect
> > there's no such distinction for the existing uses of pkg-config?
> >
> Thanks for your suggestion, Nick! Yes I think it makes sense with PKGCONFIG
> instead of HOSTPKG_CONFIG since there is only one tool involved. I will
> work on it and submit a new patch.
>

Please hold on.

I was also wondering what to do with the "HOST" prefix.

Libraries are usually arch-dependent.
(in other words, pkg-config should return different library paths
for $(CC) and $(HOSTCC) )

You already understood this, so you added "HOST" prefix.


Please let me take time for further discussion.
I will come back to this when I get some time.


In the meantime,
a8a5cd8b472ca20e5b8fa649c43b3756867322f8
as reference info if you have not seen it.


How many distros support something like
"aarch64-linux-gnu-pkg-config" ?

Ubuntu 18.04 and 20.04 seem to support it.
I do not know for others.





--
Best Regards

Masahiro Yamada

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