On Mon, Jan 4, 2021 at 6:18 PM James Le Cuirot <ch...@gentoo.org> wrote: > $ PKG_CONFIG_SYSROOT_DIR=/foo pkg-config --variable=udevdir udev > /lib/udev > > The udevdir variable is not affected by PKG_CONFIG_SYSROOT_DIR at all. > And why would it be? The man page says that this variable is only > applied to -I and -L flags. I don't know for sure but I suspect that > pkg-config just sees this as some arbitrary variable with no special > path handling at all. I wonder what led you to think that this fix was > necessary?
Interesting! pkg-config behaves differently on my system: % PKG_CONFIG_SYSROOT_DIR=/foo pkg-config --variable=udevdir udev /foo/lib/udev This appears to be a difference in behavior between dev-util/pkgconfig and dev-util/pkgconf. I am using pkgconf, and I would guess you are using pkgconfig. I guess I will ask pkgconf upstream for help on this; it seems like this is probably an unintended behavior. > One last question. Why is this dynamic at all? Shouldn't it just be > hardcoded to /lib/udev? Sure, a user could patch udev to make it > something different if they really wanted but there are plenty of other > paths we just assume. What makes this one special? sys-apps/systemd has a USE flag called "split-usr". This is meant to allow users to perform a /usr merge if desired. When split-usr is disabled, udevdir becomes /usr/lib/udev instead of /lib/udev.
