[PATCH 1/8] We copied rust.inc to rust-test.inc file, since the rust.inc generates the rquired wrappers (which contains target compiler paths) in place. Which we can use in config.toml file for cross testing. We are trying to generate the config.toml through do_configure option in rust-test.inc file.

["Vinay Kumar" <vinay.m.engg@gmail.com>]

The config.toml we are generating throgh rust-test.inc is as below,
===============================================
[target.arm-poky-linux-gnueabi]
cxx = "{yocto-build-target-path}/rust-test/1.46.0-r0/wrapper/target-rust-cxx"
cc = "{yocto-build-target-path}/rust-test/1.46.0-r0/wrapper/target-rust-cc"
linker = "{yocto-build-target-path}/rust-test/1.46.0-r0/wrapper/target-rust-ccld"

[target.x86_64-unknown-linux-gnu]
cxx = "{yocto-build-target-path}/rust-test/1.46.0-r0/wrapper/build-rust-cxx"
cc = "{yocto-build-target-path}/rust-test/1.46.0-r0/wrapper/build-rust-cc"

[rust]
rpath = true
channel = "stable"
optimize = true
verbose-tests = true

[build]
submodules = false
docs = false
rustc = "{yocto-build-target-path}/rust-test/1.46.0-r0/rust-snapshot/bin/rustc"
cargo = "{yocto-build-target-path}/rust-test/1.46.0-r0/rust-snapshot/bin/cargo"
vendor = true
verbose = 2
build-dir = "build-arm"
target = ["arm-poky-linux-gnueabi"]
host = ["x86_64-unknown-linux-gnu"]
build = "x86_64-unknown-linux-gnu"
===============================================

And "rust-test_1.46.0.bb" is copy of rust_1.46.0.bb so that we can use with changes
specific to "rust-test.inc". Also, we removed "llvm_config" path from generating in the config.toml

Signed-off-by: Vinay Kumar <vinay.m.engg@gmail.com>
---
 meta/recipes-devtools/rust/rust-test.inc      | 520 ++++++++++++++++++
 .../recipes-devtools/rust/rust-test_1.46.0.bb |  12 +
 2 files changed, 532 insertions(+)
 create mode 100644 meta/recipes-devtools/rust/rust-test.inc
 create mode 100644 meta/recipes-devtools/rust/rust-test_1.46.0.bb

diff --git a/meta/recipes-devtools/rust/rust-test.inc b/meta/recipes-devtools/rust/rust-test.inc
new file mode 100644
index 0000000000..0d3eaa10cf
--- /dev/null
+++ b/meta/recipes-devtools/rust/rust-test.inc
@@ -0,0 +1,520 @@
+SUMMARY = "Rust compiler and runtime libaries"
+HOMEPAGE = "http://www.rust-lang.org"
+SECTION = "devel"
+LICENSE = "MIT | Apache-2.0"
+
+inherit rust
+inherit cargo_common
+
+DEPENDS += "file-native python3-native"
+DEPENDS_append_class-native = " rust-llvm-native"
+EXCLUDE_FROM_WORLD = "1"
+
+# We generate local targets, and need to be able to locate them
+export RUST_TARGET_PATH="${WORKDIR}/targets/"
+
+export FORCE_CRATE_HASH="${BB_TASKHASH}"
+
+export YOCTO_ALTERNATE_EXE_PATH = "${STAGING_LIBDIR}/llvm-rust/bin/llvm-config"
+export YOCTO_ALTERNATE_MULTILIB_NAME = "/${BASELIB}"
+
+# We don't want to use bitbakes vendoring because the rust sources do their
+# own vendoring.
+CARGO_DISABLE_BITBAKE_VENDORING = "1"
+
+# We can't use RUST_BUILD_SYS here because that may be "musl" if
+# TCLIBC="musl". Snapshots are always -unknown-linux-gnu
+SNAPSHOT_BUILD_SYS = "${BUILD_ARCH}-unknown-linux-gnu"
+setup_cargo_environment () {
+    # The first step is to build bootstrap and some early stage tools,
+    # these are build for the same target as the snapshot, e.g.
+    # x86_64-unknown-linux-gnu.
+    # Later stages are build for the native target (i.e. target.x86_64-linux)
+    cargo_common_do_configure
+
+    printf '[target.%s]\n' "${SNAPSHOT_BUILD_SYS}" >> ${CARGO_HOME}/config
+    printf "linker = '%s'\n" "${RUST_BUILD_CCLD}" >> ${CARGO_HOME}/config
+}
+
+# Right now this is focused on arm-specific tune features.
+# We get away with this for now as one can only use x86-64 as the build host
+# (not arm).
+# Note that TUNE_FEATURES is _always_ refering to the target, so we really
+# don't want to use this for the host/build.
+def llvm_features_from_tune(d):
+    f = []
+    feat = d.getVar('TUNE_FEATURES')
+    if not feat:
+        return []
+    feat = frozenset(feat.split())
+
+    mach_overrides = d.getVar('MACHINEOVERRIDES')
+    mach_overrides = frozenset(mach_overrides.split(':'))
+
+    if 'vfpv4' in feat:
+        f.append("+vfp4")
+    if 'vfpv3' in feat:
+        f.append("+vfp3")
+    if 'vfpv3d16' in feat:
+        f.append("+d16")
+
+    if 'vfpv2' in feat or 'vfp' in feat:
+        f.append("+vfp2")
+
+    if 'neon' in feat:
+        f.append("+neon")
+
+    if 'aarch64' in feat:
+        f.append("+v8")
+
+    if 'mips32' in feat:
+        f.append("+mips32")
+
+    if 'mips32r2' in feat:
+        f.append("+mips32r2")
+
+    if target_is_armv7(d):
+        f.append('+v7')
+
+    if ('armv6' in mach_overrides) or ('armv6' in feat):
+        f.append("+v6")
+
+    if 'dsp' in feat:
+        f.append("+dsp")
+
+    if 'thumb' in feat:
+        if d.getVar('ARM_THUMB_OPT') is "thumb":
+            if target_is_armv7(d):
+                f.append('+thumb2')
+            f.append("+thumb-mode")
+
+    if 'cortexa5' in feat:
+        f.append("+a5")
+    if 'cortexa7' in feat:
+        f.append("+a7")
+    if 'cortexa9' in feat:
+        f.append("+a9")
+    if 'cortexa15' in feat:
+        f.append("+a15")
+    if 'cortexa17' in feat:
+        f.append("+a17")
+    if ('riscv64' in feat) or ('riscv32' in feat):
+        f.append("+a,+c,+d,+f,+m")
+    return f
+
+# TARGET_CC_ARCH changes from build/cross/target so it'll do the right thing
+# this should go away when https://github.com/rust-lang/rust/pull/31709 is
+# stable (1.9.0?)
+def llvm_features_from_cc_arch(d):
+    f = []
+    feat = d.getVar('TARGET_CC_ARCH')
+    if not feat:
+        return []
+    feat = frozenset(feat.split())
+
+    if '-mmmx' in feat:
+        f.append("+mmx")
+    if '-msse' in feat:
+        f.append("+sse")
+    if '-msse2' in feat:
+        f.append("+sse2")
+    if '-msse3' in feat:
+        f.append("+sse3")
+    if '-mssse3' in feat:
+        f.append("+ssse3")
+    if '-msse4.1' in feat:
+        f.append("+sse4.1")
+    if '-msse4.2' in feat:
+        f.append("+sse4.2")
+    if '-msse4a' in feat:
+        f.append("+sse4a")
+    if '-mavx' in feat:
+        f.append("+avx")
+    if '-mavx2' in feat:
+        f.append("+avx2")
+
+    return f
+
+def llvm_features_from_target_fpu(d):
+    # TARGET_FPU can be hard or soft. +soft-float tell llvm to use soft float
+    # ABI. There is no option for hard.
+
+    fpu = d.getVar('TARGET_FPU', True)
+    return ["+soft-float"] if fpu == "soft" else []
+
+def llvm_features(d):
+    return ','.join(llvm_features_from_tune(d) +
+                    llvm_features_from_cc_arch(d) +
+                    llvm_features_from_target_fpu(d))
+
+## arm-unknown-linux-gnueabihf
+DATA_LAYOUT[arm] = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+LLVM_TARGET[arm] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[arm] = "little"
+TARGET_POINTER_WIDTH[arm] = "32"
+TARGET_C_INT_WIDTH[arm] = "32"
+MAX_ATOMIC_WIDTH[arm] = "64"
+FEATURES[arm] = "+v6,+vfp2"
+
+## armv7-unknown-linux-gnueabihf
+DATA_LAYOUT[armv7] = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
+LLVM_TARGET[armv7] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[armv7] = "little"
+TARGET_POINTER_WIDTH[armv7] = "32"
+TARGET_C_INT_WIDTH[armv7] = "32"
+MAX_ATOMIC_WIDTH[armv7] = "64"
+FEATURES[armv7] = "+v7,+vfp2,+thumb2"
+
+## aarch64-unknown-linux-{gnu, musl}
+DATA_LAYOUT[aarch64] = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
+LLVM_TARGET[aarch64] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[aarch64] = "little"
+TARGET_POINTER_WIDTH[aarch64] = "64"
+TARGET_C_INT_WIDTH[aarch64] = "32"
+MAX_ATOMIC_WIDTH[aarch64] = "128"
+
+## x86_64-unknown-linux-{gnu, musl}
+DATA_LAYOUT[x86_64] = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+LLVM_TARGET[x86_64] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[x86_64] = "little"
+TARGET_POINTER_WIDTH[x86_64] = "64"
+TARGET_C_INT_WIDTH[x86_64] = "32"
+MAX_ATOMIC_WIDTH[x86_64] = "64"
+
+## i686-unknown-linux-{gnu, musl}
+DATA_LAYOUT[i686] = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
+LLVM_TARGET[i686] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[i686] = "little"
+TARGET_POINTER_WIDTH[i686] = "32"
+TARGET_C_INT_WIDTH[i686] = "32"
+MAX_ATOMIC_WIDTH[i686] = "64"
+
+## XXX: a bit of a hack so qemux86 builds, clone of i686-unknown-linux-{gnu, musl} above
+DATA_LAYOUT[i586] = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
+LLVM_TARGET[i586] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[i586] = "little"
+TARGET_POINTER_WIDTH[i586] = "32"
+TARGET_C_INT_WIDTH[i586] = "32"
+MAX_ATOMIC_WIDTH[i586] = "64"
+
+## mips-unknown-linux-{gnu, musl}
+DATA_LAYOUT[mips] = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
+LLVM_TARGET[mips] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[mips] = "big"
+TARGET_POINTER_WIDTH[mips] = "32"
+TARGET_C_INT_WIDTH[mips] = "32"
+MAX_ATOMIC_WIDTH[mips] = "32"
+
+## mipsel-unknown-linux-{gnu, musl}
+DATA_LAYOUT[mipsel] = "e-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64"
+LLVM_TARGET[mipsel] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[mipsel] = "little"
+TARGET_POINTER_WIDTH[mipsel] = "32"
+TARGET_C_INT_WIDTH[mipsel] = "32"
+MAX_ATOMIC_WIDTH[mipsel] = "32"
+
+## mips64-unknown-linux-{gnu, musl}
+DATA_LAYOUT[mips64] = "E-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128"
+LLVM_TARGET[mips64] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[mips64] = "big"
+TARGET_POINTER_WIDTH[mips64] = "64"
+TARGET_C_INT_WIDTH[mips64] = "64"
+MAX_ATOMIC_WIDTH[mips64] = "64"
+
+## mips64el-unknown-linux-{gnu, musl}
+DATA_LAYOUT[mips64el] = "e-m:e-i8:8:32-i16:16:32-i64:64-n32:64-S128"
+LLVM_TARGET[mips64el] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[mips64el] = "little"
+TARGET_POINTER_WIDTH[mips64el] = "64"
+TARGET_C_INT_WIDTH[mips64el] = "64"
+MAX_ATOMIC_WIDTH[mips64el] = "64"
+
+## powerpc-unknown-linux-{gnu, musl}
+DATA_LAYOUT[powerpc] = "E-m:e-p:32:32-i64:64-n32"
+LLVM_TARGET[powerpc] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[powerpc] = "big"
+TARGET_POINTER_WIDTH[powerpc] = "32"
+TARGET_C_INT_WIDTH[powerpc] = "32"
+MAX_ATOMIC_WIDTH[powerpc] = "32"
+
+## riscv32-unknown-linux-{gnu, musl}
+DATA_LAYOUT[riscv32] = "e-m:e-p:32:32-i64:64-n32-S128"
+LLVM_TARGET[riscv32] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[riscv32] = "little"
+TARGET_POINTER_WIDTH[riscv32] = "32"
+TARGET_C_INT_WIDTH[riscv32] = "32"
+MAX_ATOMIC_WIDTH[riscv32] = "32"
+
+## riscv64-unknown-linux-{gnu, musl}
+DATA_LAYOUT[riscv64] = "e-m:e-p:64:64-i64:64-i128:128-n64-S128"
+LLVM_TARGET[riscv64] = "${RUST_TARGET_SYS}"
+TARGET_ENDIAN[riscv64] = "little"
+TARGET_POINTER_WIDTH[riscv64] = "64"
+TARGET_C_INT_WIDTH[riscv64] = "64"
+MAX_ATOMIC_WIDTH[riscv64] = "64"
+
+def arch_for(d, thing):
+    if thing == 'TARGET' and target_is_armv7(d):
+        return "armv7"
+    else:
+        return d.getVar('{}_ARCH'.format(thing))
+
+def sys_for(d, thing):
+    return d.getVar('{}_SYS'.format(thing))
+
+def prefix_for(d, thing):
+    return d.getVar('{}_PREFIX'.format(thing))
+
+# Convert a normal arch (HOST_ARCH, TARGET_ARCH, BUILD_ARCH, etc) to something
+# rust's internals won't choke on.
+def arch_to_rust_target_arch(arch):
+    if arch == "i586" or arch == "i686":
+        return "x86"
+    elif arch == "mipsel":
+        return "mips"
+    elif arch == "mip64sel":
+        return "mips64"
+    elif arch == "armv7":
+        return "arm"
+    else:
+        return arch
+
+# generates our target CPU value
+def llvm_cpu(d):
+    cpu = d.getVar('PACKAGE_ARCH')
+    target = d.getVar('TRANSLATED_TARGET_ARCH')
+
+    trans = {}
+    trans['corei7-64'] = "corei7"
+    trans['core2-32'] = "core2"
+    trans['x86-64'] = "x86-64"
+    trans['i686'] = "i686"
+    trans['i586'] = "i586"
+    trans['powerpc'] = "powerpc"
+    trans['mips64'] = "mips64"
+    trans['mips64el'] = "mips64"
+    trans['riscv64'] = "generic-rv64"
+    trans['riscv32'] = "generic-rv32"
+
+    if target in ["mips", "mipsel"]:
+        feat = frozenset(d.getVar('TUNE_FEATURES').split())
+        if "mips32r2" in feat:
+            trans['mipsel'] = "mips32r2"
+            trans['mips'] = "mips32r2"
+        elif "mips32" in feat:
+            trans['mipsel'] = "mips32"
+            trans['mips'] = "mips32"
+
+    try:
+        return trans[cpu]
+    except:
+        return trans.get(target, "generic")
+
+TARGET_LLVM_CPU="${@llvm_cpu(d)}"
+TARGET_LLVM_FEATURES = "${@llvm_features(d)}"
+
+# class-native implies TARGET=HOST, and TUNE_FEATURES only describes the real
+# (original) target.
+TARGET_LLVM_FEATURES_class-native = "${@','.join(llvm_features_from_cc_arch(d))}"
+
+def rust_gen_target(d, thing, wd, features, cpu):
+    import json
+    from distutils.version import LooseVersion
+    arch = arch_for(d, thing)
+    sys = sys_for(d, thing)
+    prefix = prefix_for(d, thing)
+
+    features = features or d.getVarFlag('FEATURES', arch) or ""
+    features = features.strip()
+
+    # build tspec
+    tspec = {}
+    tspec['llvm-target'] = d.getVarFlag('LLVM_TARGET', arch)
+    tspec['data-layout'] = d.getVarFlag('DATA_LAYOUT', arch)
+    tspec['max-atomic-width'] = int(d.getVarFlag('MAX_ATOMIC_WIDTH', arch))
+    tspec['target-pointer-width'] = d.getVarFlag('TARGET_POINTER_WIDTH', arch)
+    tspec['target-c-int-width'] = d.getVarFlag('TARGET_C_INT_WIDTH', arch)
+    tspec['target-endian'] = d.getVarFlag('TARGET_ENDIAN', arch)
+    tspec['arch'] = arch_to_rust_target_arch(arch)
+    tspec['os'] = "linux"
+    if "musl" in tspec['llvm-target']:
+        tspec['env'] = "musl"
+    else:
+        tspec['env'] = "gnu"
+    if "riscv64" in tspec['llvm-target']:
+        tspec['llvm-abiname'] = "lp64d"
+    if "riscv32" in tspec['llvm-target']:
+        tspec['llvm-abiname'] = "ilp32d"
+    tspec['vendor'] = "unknown"
+    tspec['target-family'] = "unix"
+    tspec['linker'] = "{}{}gcc".format(d.getVar('CCACHE'), prefix)
+    tspec['ar'] = "{}ar".format(prefix)
+    tspec['cpu'] = cpu
+    if features is not "":
+        tspec['features'] = features
+    tspec['dynamic-linking'] = True
+    tspec['executables'] = True
+    tspec['linker-is-gnu'] = True
+    tspec['linker-flavor'] = "gcc"
+    tspec['has-rpath'] = True
+    tspec['has-elf-tls'] = True
+    tspec['position-independent-executables'] = True
+    tspec['panic-strategy'] = d.getVar("RUST_PANIC_STRATEGY")
+
+    # Don't use jemalloc as it doesn't work for many targets.
+    # https://github.com/rust-lang/rust/pull/37392
+    # From 1.20.0 and forward, system allocator is the default.
+    if LooseVersion(d.getVar("PV")) < LooseVersion("1.20.0"):
+        tspec['exe-allocation-crate'] = "alloc_system"
+        tspec['lib-allocation-crate'] = "alloc_system"
+
+    # write out the target spec json file
+    with open(wd + sys + '.json', 'w') as f:
+        json.dump(tspec, f, indent=4)
+
+python do_rust_gen_targets () {
+    wd = d.getVar('WORKDIR') + '/targets/'
+    rust_gen_target(d, 'BUILD', wd, "", "generic")
+}
+
+addtask rust_gen_targets after do_patch before do_compile
+do_rust_gen_targets[dirs] += "${WORKDIR}/targets"
+
+do_rust_setup_snapshot () {
+    for installer in "${WORKDIR}/rust-snapshot-components/"*"/install.sh"; do
+        "${installer}" --prefix="${WORKDIR}/rust-snapshot" --disable-ldconfig
+    done
+
+    # Some versions of rust (e.g. 1.18.0) tries to find cargo in stage0/bin/cargo
+    # and fail without it there.
+    mkdir -p ${RUSTSRC}/build/${BUILD_SYS}
+    ln -sf ${WORKDIR}/rust-snapshot/ ${RUSTSRC}/build/${BUILD_SYS}/stage0
+}
+addtask rust_setup_snapshot after do_unpack before do_configure
+do_rust_setup_snapshot[dirs] += "${WORKDIR}/rust-snapshot"
+
+
+python do_configure() {
+    import json
+    from distutils.version import LooseVersion
+    try:
+        import configparser
+    except ImportError:
+        import ConfigParser as configparser
+
+    # toml is rather similar to standard ini like format except it likes values
+    # that look more JSON like. So for our purposes simply escaping all values
+    # as JSON seem to work fine.
+
+    e = lambda s: json.dumps(s)
+
+    config = configparser.RawConfigParser()
+
+    # [target.ARCH-poky-linux]
+    target_section = "target.{}".format(d.getVar('RUST_TARGET_SYS', True))
+    config.add_section(target_section)
+
+    # Points to wrapper files which contain target specific compiler and linker commands. 
+    config.set(target_section, "cxx", e(d.expand("${RUST_TARGET_CXX}")))
+    config.set(target_section, "cc", e(d.expand("${RUST_TARGET_CC}")))
+    config.set(target_section, "linker", e(d.expand("${RUST_TARGET_CCLD}")))
+
+    # If we don't do this rust-native will compile it's own llvm for BUILD.
+    # [target.${BUILD_ARCH}-unknown-linux-gnu]
+    target_section = "target.{}".format(d.getVar('SNAPSHOT_BUILD_SYS', True))
+    config.add_section(target_section)
+
+    # Wrapper scripts of build system.
+    config.set(target_section, "cxx", e(d.expand("${RUST_BUILD_CXX}")))
+    config.set(target_section, "cc", e(d.expand("${RUST_BUILD_CC}")))
+
+    # [rust]
+    config.add_section("rust")
+    config.set("rust", "rpath", e(True))
+    config.set("rust", "channel", e("stable"))
+
+    if LooseVersion(d.getVar("PV")) < LooseVersion("1.32.0"):
+        config.set("rust", "use-jemalloc", e(False))
+
+    # Whether or not to optimize the compiler and standard library
+    config.set("rust", "optimize", e(True))
+
+    # Emits extraneous output from tests to ensure that failures of the test
+    # harness are debuggable just from logfiles
+    config.set("rust", "verbose-tests", e(True))    
+
+    # [build]
+    config.add_section("build")
+    config.set("build", "submodules", e(False))
+    config.set("build", "docs", e(False))
+
+    rustc = d.expand("${WORKDIR}/rust-snapshot/bin/rustc")
+    config.set("build", "rustc", e(rustc))
+
+    cargo = d.expand("${WORKDIR}/rust-snapshot/bin/cargo")
+    config.set("build", "cargo", e(cargo))
+
+    config.set("build", "vendor", e(True))
+
+    # Here we are adding "RUST_TARGET_SYS" instead of "TARGET_SYS" as we are using rust supported target.
+    targets = [d.getVar("RUST_TARGET_SYS", True)]
+    config.set("build", "target", e(targets))
+
+    hosts = [d.getVar("SNAPSHOT_BUILD_SYS", True)]
+    config.set("build", "host", e(hosts))
+
+    # We can't use BUILD_SYS since that is something the rust snapshot knows
+    # nothing about when trying to build some stage0 tools (like fabricate)
+    config.set("build", "build", e(d.getVar("SNAPSHOT_BUILD_SYS", True)))
+
+    with open("config.toml", "w") as f:
+        config.write(f)
+
+    # set up ${WORKDIR}/cargo_home
+    bb.build.exec_func("setup_cargo_environment", d)
+}
+
+
+rust_runx () {
+    echo "COMPILE ${PN}" "$@"
+
+    # CFLAGS, LDFLAGS, CXXFLAGS, CPPFLAGS are used by rust's build for a
+    # wide range of targets (not just TARGET). Yocto's settings for them will
+    # be inappropriate, avoid using.
+    unset CFLAGS
+    unset LDFLAGS
+    unset CXXFLAGS
+    unset CPPFLAGS
+
+    oe_cargo_fix_env
+
+    python3 src/bootstrap/bootstrap.py ${@oe.utils.parallel_make_argument(d, '-j %d')} "$@" --verbose
+}
+rust_runx[vardepsexclude] += "PARALLEL_MAKE"
+
+do_compile () {
+    rust_runx build
+}
+
+rust_do_install () {
+    mkdir -p ${D}${bindir}
+    cp build/${HOST_SYS}/stage2/bin/* ${D}${bindir}
+
+    mkdir -p ${D}${libdir}/rustlib
+    cp -pRd build/${HOST_SYS}/stage2/lib/* ${D}${libdir}
+    # Remove absolute symlink so bitbake doesn't complain
+    rm -f ${D}${libdir}/rustlib/src/rust
+
+    # Install our custom target.json files
+    local td="${D}${libdir}/rustlib/"
+    install -d "$td"
+    for tgt in "${WORKDIR}/targets/"* ; do
+        install -m 0644 "$tgt" "$td"
+    done
+}
+
+
+do_install () {
+    rust_do_install
+}
+# ex: sts=4 et sw=4 ts=8
diff --git a/meta/recipes-devtools/rust/rust-test_1.46.0.bb b/meta/recipes-devtools/rust/rust-test_1.46.0.bb
new file mode 100644
index 0000000000..b724ea5eb0
--- /dev/null
+++ b/meta/recipes-devtools/rust/rust-test_1.46.0.bb
@@ -0,0 +1,12 @@
+require rust-test.inc
+require rust-source-${PV}.inc
+require rust-snapshot-${PV}.inc
+
+DEPENDS += "rust-llvm (=${PV})"
+
+# Otherwise we'll depend on what we provide
+INHIBIT_DEFAULT_RUST_DEPS_class-native = "1"
+# We don't need to depend on gcc-native because yocto assumes it exists
+PROVIDES_class-native = "virtual/${TARGET_PREFIX}rust"
+
+BBCLASSEXTEND = "native"
-- 
2.17.1