linux-kernel - Re: [PATCH] scripts: Fix linking extract-cert against libcrypto

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Date:   Fri, 12 Feb 2021 08:44:46 +0100
From:   Rolf Eike Beer <eb@...ix.com>
To:     Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kbuild@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>,
        Daniel Díaz <daniel.diaz@...aro.org>
Cc:     stable@...r.kernel.org, Naresh Kamboju <naresh.kamboju@...aro.org>
Subject: Re: [PATCH] scripts: Fix linking extract-cert against libcrypto

Am Donnerstag, 11. Februar 2021, 11:29:33 CET schrieb Rolf Eike Beer:

> I'm just guessing, but your build error looks like you are also
> cross-building the tools, which is wrong. You want them to be host-tools.
> So don't export PKG_CONFIG_SYSROOT_DIR, it would then try to link target
> libraries into a host binary.

I have looked again how I do it:

# this is for additional _host_ .pc files
export PKG_CONFIG_PATH=${prefix}/lib/pkgconfig

Then have a target-pkg-config, so this code inside several kernel Makefiles 
will work:

PKG_CONFIG ?= $(CROSS_COMPILE)pkg-config

And then export your PKG_CONFIG_SYSROOT_DIR and the like inside that. I bet 
you have all of this already in place, so just remove the SYSROOT_DIR from 
your kernel build script and things should work.

Eike
-- 
Rolf Eike Beer, emlix GmbH, http://www.emlix.com
Fon +49 551 30664-0, Fax +49 551 30664-11
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