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openwrt/tools/pkgconf
Jo-Philipp Wich 6de7406d54 pkgconf: always retain -I and -L flags
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@mein.io>
Acked-by: Petr Štetiar <ynezz@true.cz>
4 years ago
..
files pkgconf: always retain -I and -L flags 4 years ago
patches tools/pkg-config: Replace with pkgconf 4 years ago
Makefile tools/pkg-config: Replace with pkgconf 4 years ago