rust-bin.bbclass: suffix rust libraries with -rs

Rust library names may have sonames that overlap with C/C++ libraries.
This causes bitbake to not be able to create the correct automatic
RDEPENDS between packages. The result is that dependencies may not get
automatically installed.

Add -rs to the file name and soname. The crate name remains the same,
and rust is not dependent on the file name to look up the crate inside
the library.

classes/rust-bin.bbclass

@@ -38,7 +38,7 @@ RUSTC_FLAGS += "-C prefer-dynamic"
 rustlib="${libdir}/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}/rustlib/${HOST_SYS}/lib"
 CRATE_NAME ?= "${@d.getVar('BPN', True).replace('-rs', '').replace('-', '_')}"
 BINNAME ?= "${BPN}"
-LIBNAME ?= "lib${CRATE_NAME}"
+LIBNAME ?= "lib${CRATE_NAME}-rs"
 CRATE_TYPE ?= "dylib"
 BIN_SRC ?= "${S}/src/main.rs"
 LIB_SRC ?= "${S}/src/lib.rs"
@@ -46,7 +46,7 @@ LIB_SRC ?= "${S}/src/lib.rs"
 get_overlap_externs () {
     externs=
     for dep in ${OVERLAP_DEPS}; do
-        extern=$(ls ${STAGING_DIR_HOST}/${rustlibdir}/lib$dep.{so,rlib} 2>/dev/null \
+        extern=$(ls ${STAGING_DIR_HOST}/${rustlibdir}/lib$dep-rs.{so,rlib} 2>/dev/null \
                     | awk '{print $1}');
         if [ -n "$extern" ]; then
             externs="$externs --extern $dep=$extern"
@@ -59,15 +59,17 @@ get_overlap_externs () {
 }
 
 oe_compile_rust_lib () {
+    [ "${CRATE_TYPE}" == "dylib" ] && suffix=so || suffix=rlib
     rm -rf ${LIBNAME}.{rlib,so}
     local -a link_args
     if [ "${CRATE_TYPE}" == "dylib" ]; then
         link_args[0]="-C"
-        link_args[1]="link-args=-Wl,-soname -Wl,${LIBNAME}.so"
+        link_args[1]="link-args=-Wl,-soname -Wl,${LIBNAME}.$suffix"
     fi
     oe_runrustc $(get_overlap_externs) \
         "${link_args[@]}" \
         ${LIB_SRC} \
+        -o ${LIBNAME}.$suffix \
         --crate-name=${CRATE_NAME} --crate-type=${CRATE_TYPE} \
         "$@"
 }