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.

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>

diff --git a/meta/classes-recipe/rust-common.bbclass b/meta/classes-recipe/rust-common.bbclass
index 6940093e59bfc710999f4c677b04b08457bb8331..b4b70574a292fc48ab04277d0f9f581174cc1f65 100644 (file)
--- a/meta/classes-recipe/rust-common.bbclass
+++ b/meta/classes-recipe/rust-common.bbclass
@@ -13,7 +13,7 @@ FILES:${PN} += "${rustlibdir}/*.so"
 FILES:${PN}-dev += "${rustlibdir}/*.rlib ${rustlibdir}/*.rmeta"
 FILES:${PN}-dbg += "${rustlibdir}/.debug"
 
-RUSTLIB = "-L ${STAGING_DIR_HOST}${rustlibdir}"
+RUSTLIB ?= "-L ${STAGING_DIR_HOST}${rustlibdir}"
 RUST_DEBUG_REMAP = "--remap-path-prefix=${WORKDIR}=${TARGET_DBGSRC_DIR}"
 RUSTFLAGS += "${RUSTLIB} ${RUST_DEBUG_REMAP}"
 RUSTLIB_DEP ??= "libstd-rs"