rust: initial merge of most of meta-rust

In the meta-rust repo at commit:
   448047c Upgrade to 1.54.0 (#359)

Make the required directories:
  mkdir ../oe-core/meta/recipes-devtools/rust
  mkdir ../oe-core/meta/recipes-devtools/cargo
  mkdir ../oe-core/meta/recipes-example
and then:
  cp recipes-devtools/rust/* ../oe-core/meta/recipes-devtools/rust
  cp recipes-devtools/cargo/* ../oe-core/meta/recipes-devtools/cargo
  cp lib/crate.py ../oe-core/meta/lib
  cp recipes-example/* ../oe-core/meta/recipes-example
  cp conf/distro/include/rust_* ../oe-core/meta/conf/distro/include/
  cp classes/* ../oe-core/meta/classes/
  cp recipes-core/packagegroups/packagegroup-rust-cross-canadian.bb ../oe-core/meta/recipes-core/packagegroups

(From OE-Core rev: 3ed57578cca93ff1ba4e0bf3f25566e10659a2f9)

Signed-off-by: Randy MacLeod <Randy.MacLeod@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 149 insertions, 0 deletions

diff --git a/meta/classes/rust-bin.bbclass b/meta/classes/rust-bin.bbclass
new file mode 100644
index 0000000000..c87343b3cf
--- /dev/null
+++ b/meta/classes/rust-bin.bbclass
@@ -0,0 +1,149 @@
+inherit rust
+
+RDEPENDS:${PN}:append:class-target = " ${RUSTLIB_DEP}"
+
+RUSTC_ARCHFLAGS += "-C opt-level=3 -g -L ${STAGING_DIR_HOST}/${rustlibdir} -C linker=${RUST_TARGET_CCLD}"
+EXTRA_OEMAKE += 'RUSTC_ARCHFLAGS="${RUSTC_ARCHFLAGS}"'
+
+# Some libraries alias with the standard library but libstd is configured to
+# make it difficult or imposisble to use its version. Unfortunately libstd
+# must be explicitly overridden using extern.
+OVERLAP_LIBS = "\
+    libc \
+    log \
+    getopts \
+    rand \
+"
+def get_overlap_deps(d):
+    deps = d.getVar("DEPENDS").split()
+    overlap_deps = []
+    for o in d.getVar("OVERLAP_LIBS").split():
+        l = len([o for dep in deps if (o + '-rs' in dep)])
+        if l > 0:
+            overlap_deps.append(o)
+    return " ".join(overlap_deps)
+OVERLAP_DEPS = "${@get_overlap_deps(d)}"
+
+# Prevents multiple static copies of standard library modules
+# See https://github.com/rust-lang/rust/issues/19680
+RUSTC_PREFER_DYNAMIC = "-C prefer-dynamic"
+RUSTC_FLAGS += "${RUSTC_PREFER_DYNAMIC}"
+
+CRATE_NAME ?= "${@d.getVar('BPN').replace('-rs', '').replace('-', '_')}"
+BINNAME ?= "${BPN}"
+LIBNAME ?= "lib${CRATE_NAME}-rs"
+CRATE_TYPE ?= "dylib"
+BIN_SRC ?= "${S}/src/main.rs"
+LIB_SRC ?= "${S}/src/lib.rs"
+
+rustbindest ?= "${bindir}"
+rustlibdest ?= "${rustlibdir}"
+RUST_RPATH_ABS ?= "${rustlibdir}:${rustlib}"
+
+def relative_rpaths(paths, base):
+    relpaths = set()
+    for p in paths.split(':'):
+        if p == base:
+            relpaths.add('$ORIGIN')
+            continue
+        relpaths.add(os.path.join('$ORIGIN', os.path.relpath(p, base)))
+    return '-rpath=' + ':'.join(relpaths) if len(relpaths) else ''
+
+RUST_LIB_RPATH_FLAGS ?= "${@relative_rpaths(d.getVar('RUST_RPATH_ABS', True), d.getVar('rustlibdest', True))}"
+RUST_BIN_RPATH_FLAGS ?= "${@relative_rpaths(d.getVar('RUST_RPATH_ABS', True), d.getVar('rustbindest', True))}"
+
+def libfilename(d):
+    if d.getVar('CRATE_TYPE', True) == 'dylib':
+        return d.getVar('LIBNAME', True) + '.so'
+    else:
+        return d.getVar('LIBNAME', True) + '.rlib'
+
+def link_args(d, bin):
+    linkargs = []
+    if bin:
+        rpaths = d.getVar('RUST_BIN_RPATH_FLAGS', False)
+    else:
+        rpaths = d.getVar('RUST_LIB_RPATH_FLAGS', False)
+        if d.getVar('CRATE_TYPE', True) == 'dylib':
+            linkargs.append('-soname')
+            linkargs.append(libfilename(d))
+    if len(rpaths):
+        linkargs.append(rpaths)
+    if len(linkargs):
+        return ' '.join(['-Wl,' + arg for arg in linkargs])
+    else:
+        return ''
+
+get_overlap_externs () {
+    externs=
+    for dep in ${OVERLAP_DEPS}; do
+        extern=$(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"
+        else
+            echo "$dep in depends but no such library found in ${rustlibdir}!" >&2
+            exit 1
+        fi
+    done
+    echo "$externs"
+}
+
+do_configure () {
+}
+
+oe_runrustc () {
+        export RUST_TARGET_PATH="${RUST_TARGET_PATH}"
+        bbnote ${RUSTC} ${RUSTC_ARCHFLAGS} ${RUSTC_FLAGS} "$@"
+        "${RUSTC}" ${RUSTC_ARCHFLAGS} ${RUSTC_FLAGS} "$@"
+}
+
+oe_compile_rust_lib () {
+    rm -rf ${LIBNAME}.{rlib,so}
+    local -a link_args
+    if [ -n '${@link_args(d, False)}' ]; then
+        link_args[0]='-C'
+        link_args[1]='link-args=${@link_args(d, False)}'
+    fi
+    oe_runrustc $(get_overlap_externs) \
+        "${link_args[@]}" \
+        ${LIB_SRC} \
+        -o ${@libfilename(d)} \
+        --crate-name=${CRATE_NAME} --crate-type=${CRATE_TYPE} \
+        "$@"
+}
+oe_compile_rust_lib[vardeps] += "get_overlap_externs"
+
+oe_compile_rust_bin () {
+    rm -rf ${BINNAME}
+    local -a link_args
+    if [ -n '${@link_args(d, True)}' ]; then
+        link_args[0]='-C'
+        link_args[1]='link-args=${@link_args(d, True)}'
+    fi
+    oe_runrustc $(get_overlap_externs) \
+        "${link_args[@]}" \
+        ${BIN_SRC} -o ${BINNAME} "$@"
+}
+oe_compile_rust_bin[vardeps] += "get_overlap_externs"
+
+oe_install_rust_lib () {
+    for lib in $(ls ${LIBNAME}.{so,rlib} 2>/dev/null); do
+        echo Installing $lib
+        install -D -m 755 $lib ${D}/${rustlibdest}/$lib
+    done
+}
+
+oe_install_rust_bin () {
+    echo Installing ${BINNAME}
+    install -D -m 755 ${BINNAME} ${D}/${rustbindest}/${BINNAME}
+}
+
+do_rust_bin_fixups() {
+    for f in `find ${PKGD} -name '*.so*'`; do
+        echo "Strip rust note: $f"
+        ${OBJCOPY} -R .note.rustc $f $f
+    done
+}
+PACKAGE_PREPROCESS_FUNCS += "do_rust_bin_fixups"
+