[OE-Core][PATCH 2/3] cargo: Move CARGO_MANIFEST_PATH/CARGO_SRC_DIR to cargo_common

[Alex Kiernan <alex.kiernan@gmail.com>]

cargo_common_do_configure uses CARGO_MANIFEST_PATH (which depends on
CARGO_SRC_DIR), but their definition was in cargo.bbclass.

Match the other variables here and change to default values, rather
than weak defaults.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
---

 meta/classes-recipe/cargo.bbclass        | 7 -------
 meta/classes-recipe/cargo_common.bbclass | 7 +++++++
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/meta/classes-recipe/cargo.bbclass b/meta/classes-recipe/cargo.bbclass
index 96a74e2ef1ec..0829a58dd90f 100644
--- a/meta/classes-recipe/cargo.bbclass
+++ b/meta/classes-recipe/cargo.bbclass
@@ -30,13 +30,6 @@ B = "${WORKDIR}/build"
 # where the issue occured
 export RUST_BACKTRACE = "1"
 
-# The directory of the Cargo.toml relative to the root directory, per default
-# assume there's a Cargo.toml directly in the root directory
-CARGO_SRC_DIR ??= ""
-
-# The actual path to the Cargo.toml
-CARGO_MANIFEST_PATH ??= "${S}/${CARGO_SRC_DIR}/Cargo.toml"
-
 RUSTFLAGS ??= ""
 BUILD_MODE = "${@['--release', ''][d.getVar('DEBUG_BUILD') == '1']}"
 # --frozen flag will prevent network access (which is required since only
diff --git a/meta/classes-recipe/cargo_common.bbclass b/meta/classes-recipe/cargo_common.bbclass
index bf298e96c745..c330c122a9d3 100644
--- a/meta/classes-recipe/cargo_common.bbclass
+++ b/meta/classes-recipe/cargo_common.bbclass
@@ -33,6 +33,13 @@ CARGO_DISABLE_BITBAKE_VENDORING ?= "0"
 # Used by libstd-rs to point to the vendor dir included in rustc src
 CARGO_VENDORING_DIRECTORY ?= "${CARGO_HOME}/bitbake"
 
+# The directory of the Cargo.toml relative to the root directory, per default
+# assume there's a Cargo.toml directly in the root directory
+CARGO_SRC_DIR ?= ""
+
+# The actual path to the Cargo.toml
+CARGO_MANIFEST_PATH ?= "${S}/${CARGO_SRC_DIR}/Cargo.toml"
+
 CARGO_RUST_TARGET_CCLD ?= "${RUST_TARGET_CCLD}"
 cargo_common_do_configure () {
 	mkdir -p ${CARGO_HOME}/bitbake
-- 
2.39.0