[OpenWrt-Devel] [PATCH] pkgconf: always retain -I and -L flags

[Petr Štetiar]

Jo-Philipp Wich <jo at mein.io> [2020-03-13 15:54:50]:

> The pkgconf fork filters -I and -L flag values from .pc files which match
> pkgconf's builtin system directory value.
> 
> During configure, pkgconf derives the default system include and library
> search path values from exec_prefix, which is set to staging_dir/host in
> the host tool build phase.
> 
> Due to that, pkgconf will drop all -I and -L flags pointing to
> staging_dir/host/include or staging_dir/host/lib, unless invoked with
> --keep-system-cflags and --keep-system-libs respectively, breaking our
> kernel libelf discovery / stack validation workarounds.
> 
> In order to inhibit the filtering, add --keep-system-cflags and
> --keep-system-libs to our pkg-config shell wrapper.
> 
> Fixes: GH#2832
> Fixes: 867298cf47 ("tools/pkg-config: Replace with pkgconf")
> Ref: https://lists.infradead.org/pipermail/openwrt-devel/2020-March/022182.html
> Ref: https://git.openwrt.org/fe43969336201f2cc7d103b68fd6e65989bee184
> Signed-off-by: Jo-Philipp Wich <jo at mein.io>

Thanks for tracking it down!

Acked-by: Petr Štetiar <ynezz at true.cz>

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