On Tue, 30 Nov 2021 at 21:00, Joel Winarske <joel.winarske@gmail.com> wrote:

> Yes, if the sys_root key value in meson.cross is present
> PKG_CONFIG_SYSROOT_DIR gets set.  Honister patch I confirmed with:
>
> https://github.com/jwinarske/manifests/blob/honister/rpi64/0001-Add-sys_root-to-properties-section.patch
>
> The issue is that meson doesn't pass PKG_CONFIG_SYSROOT_DIR to the shell
> environment that runs pkg-config, as with the pkg-config sandbox test it
> does work.
>

Both meson source code and its documentation indicate otherwise - if you
set sys_root property, it will get passed to pkg-config via environment as
PKG_CONFIG_SYSROOT_DIR:
https://github.com/mesonbuild/meson/blob/master/mesonbuild/dependencies/pkgconfig.py#L121

Alex