[PATCH] rust: respect CARGO_BUILD_TARGET when locating build output

[James Le Cuirot <chewi@gentoo.org>]

When cross-compiling, Cargo always writes to a target-tuple subdirectory
determined by CARGO_BUILD_TARGET, even when it matches the native tuple.
The script looked in $BUILD_DIR/$BUILD_TYPE directly, so it failed to
find (and copy) the freshly built library.

Respect CARGO_BUILD_TARGET in the output path so the correct artifact
is located.

Signed-off-by: James Le Cuirot <chewi@gentoo.org>
---
 src/cargo-meson.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cargo-meson.sh b/src/cargo-meson.sh
index 75f3cd1..3a558aa 100755
--- a/src/cargo-meson.sh
+++ b/src/cargo-meson.sh
@@ -38,7 +38,7 @@ then
 	exit $RET
 fi
 
-if ! cmp "$BUILD_DIR/$BUILD_TYPE/$LIBNAME" "$BUILD_DIR/libgitcore.a" >/dev/null 2>&1
+if ! cmp "$BUILD_DIR/${CARGO_BUILD_TARGET-}/$BUILD_TYPE/$LIBNAME" "$BUILD_DIR/libgitcore.a" >/dev/null 2>&1
 then
-	cp "$BUILD_DIR/$BUILD_TYPE/$LIBNAME" "$BUILD_DIR/libgitcore.a"
+	cp "$BUILD_DIR/${CARGO_BUILD_TARGET-}/$BUILD_TYPE/$LIBNAME" "$BUILD_DIR/libgitcore.a"
 fi
-- 
2.55.0