rust-common.bbclass: soft assignment for RUSTLIB path

As a user i want to override `RUSTLIB` path on a bbclass, lets
call it `XYZ.bbclass`.

If a certain recipe inherits `cargo.bbclass` and `XYZ.bbclass` the
value of `RUSTLIB` is dependent on the order of the inherit.

If `cargo.bbclass` is inherit before `XYZ.bbclass` this will reflect
the desired value of `RUSTLIB`, on the oposite, if the `XYZ.bbclass`
is inherit before `cargo.bbclass` then the `RUSTLIB` defined on
`rust-common.bbclass` will prevail.

Changed definition of `RUSTLIB` to soft assignment to make it overridable.

(From OE-Core rev: d8ccc3ad338a8020c998566249af2019baaa6e44)

Signed-off-by: Pedro Silva Ferreira <Pedro.Silva.Ferreira@criticaltechworks.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
(cherry picked from commit 6eeb832f73ffb48f5f05dc47191f60e4599e640f)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/classes/rust-common.bbclass b/meta/classes/rust-common.bbclass
index cb811ac5da..1c34d4c8b9 100644
--- a/meta/classes/rust-common.bbclass
+++ b/meta/classes/rust-common.bbclass
@@ -6,7 +6,7 @@ FILES:${PN} += "${rustlibdir}/*.so"
 FILES:${PN}-dev += "${rustlibdir}/*.rlib ${rustlibdir}/*.rmeta"
 FILES:${PN}-dbg += "${rustlibdir}/.debug"
 
-RUSTLIB = "-L ${STAGING_LIBDIR}/rust"
+RUSTLIB ?= "-L ${STAGING_LIBDIR}/rust"
 RUST_DEBUG_REMAP = "--remap-path-prefix=${WORKDIR}=/usr/src/debug/${PN}/${EXTENDPE}${PV}-${PR}"
 RUSTFLAGS += "${RUSTLIB} ${RUST_DEBUG_REMAP}"
 RUSTLIB_DEP ?= "libstd-rs"