1 files changed, 139 insertions, 0 deletions

diff --git a/meta/classes-recipe/cargo_common.bbclass b/meta/classes-recipe/cargo_common.bbclass
new file mode 100644
index 0000000000..eec7710a4c
--- /dev/null
+++ b/meta/classes-recipe/cargo_common.bbclass
@@ -0,0 +1,139 @@
+#
+# Copyright OpenEmbedded Contributors
+#
+# SPDX-License-Identifier: MIT
+#
+
+##
+## Purpose:
+## This class is to support building with cargo. It
+## must be different than cargo.bbclass because Rust
+## now builds with Cargo but cannot use cargo.bbclass
+## due to dependencies and assumptions in cargo.bbclass
+## that Rust & Cargo are already installed. So this
+## is used by cargo.bbclass and Rust
+##
+
+# add crate fetch support
+inherit rust-common
+
+# Where we download our registry and dependencies to
+export CARGO_HOME = "${WORKDIR}/cargo_home"
+
+# The pkg-config-rs library used by cargo build scripts disables itself when
+# cross compiling unless this is defined. We set up pkg-config appropriately
+# for cross compilation, so tell it we know better than it.
+export PKG_CONFIG_ALLOW_CROSS = "1"
+
+# Don't instruct cargo to use crates downloaded by bitbake. Some rust packages,
+# for example the rust compiler itself, come with their own vendored sources.
+# Specifying two [source.crates-io] will not work.
+CARGO_DISABLE_BITBAKE_VENDORING ?= "0"
+
+# Used by libstd-rs to point to the vendor dir included in rustc src
+CARGO_VENDORING_DIRECTORY ?= "${CARGO_HOME}/bitbake"
+
+CARGO_RUST_TARGET_CCLD ?= "${RUST_TARGET_CCLD}"
+cargo_common_do_configure () {
+        mkdir -p ${CARGO_HOME}/bitbake
+
+        cat <<- EOF > ${CARGO_HOME}/config
+        # EXTRA_OECARGO_PATHS
+        paths = [
+        $(for p in ${EXTRA_OECARGO_PATHS}; do echo \"$p\",; done)
+        ]
+        EOF
+
+        cat <<- EOF >> ${CARGO_HOME}/config
+
+        # Local mirror vendored by bitbake
+        [source.bitbake]
+        directory = "${CARGO_VENDORING_DIRECTORY}"
+        EOF
+
+        if [ ${CARGO_DISABLE_BITBAKE_VENDORING} = "0" ]; then
+                cat <<- EOF >> ${CARGO_HOME}/config
+
+                [source.crates-io]
+                replace-with = "bitbake"
+                local-registry = "/nonexistant"
+                EOF
+        fi
+
+        cat <<- EOF >> ${CARGO_HOME}/config
+
+        [http]
+        # Multiplexing can't be enabled because http2 can't be enabled
+        # in curl-native without dependency loops
+        multiplexing = false
+
+        # Ignore the hard coded and incorrect path to certificates
+        cainfo = "${STAGING_ETCDIR_NATIVE}/ssl/certs/ca-certificates.crt"
+
+        EOF
+
+        cat <<- EOF >> ${CARGO_HOME}/config
+
+        # HOST_SYS
+        [target.${RUST_HOST_SYS}]
+        linker = "${CARGO_RUST_TARGET_CCLD}"
+        EOF
+
+        if [ "${RUST_HOST_SYS}" != "${RUST_BUILD_SYS}" ]; then
+                cat <<- EOF >> ${CARGO_HOME}/config
+
+                # BUILD_SYS
+                [target.${RUST_BUILD_SYS}]
+                linker = "${RUST_BUILD_CCLD}"
+                EOF
+        fi
+
+        if [ "${RUST_TARGET_SYS}" != "${RUST_BUILD_SYS}" -a "${RUST_TARGET_SYS}" != "${RUST_HOST_SYS}"]; then
+                cat <<- EOF >> ${CARGO_HOME}/config
+
+                # TARGET_SYS
+                [target.${RUST_TARGET_SYS}]
+                linker = "${RUST_TARGET_CCLD}"
+                EOF
+        fi
+
+        # Put build output in build directory preferred by bitbake instead of
+        # inside source directory unless they are the same
+        if [ "${B}" != "${S}" ]; then
+                cat <<- EOF >> ${CARGO_HOME}/config
+
+                [build]
+                # Use out of tree build destination to avoid poluting the source tree
+                target-dir = "${B}/target"
+                EOF
+        fi
+
+        cat <<- EOF >> ${CARGO_HOME}/config
+
+        [term]
+        progress.when = 'always'
+        progress.width = 80
+        EOF
+}
+
+oe_cargo_fix_env () {
+        export CC="${RUST_TARGET_CC}"
+        export CXX="${RUST_TARGET_CXX}"
+        export CFLAGS="${CFLAGS}"
+        export CXXFLAGS="${CXXFLAGS}"
+        export AR="${AR}"
+        export TARGET_CC="${RUST_TARGET_CC}"
+        export TARGET_CXX="${RUST_TARGET_CXX}"
+        export TARGET_CFLAGS="${CFLAGS}"
+        export TARGET_CXXFLAGS="${CXXFLAGS}"
+        export TARGET_AR="${AR}"
+        export HOST_CC="${RUST_BUILD_CC}"
+        export HOST_CXX="${RUST_BUILD_CXX}"
+        export HOST_CFLAGS="${BUILD_CFLAGS}"
+        export HOST_CXXFLAGS="${BUILD_CXXFLAGS}"
+        export HOST_AR="${BUILD_AR}"
+}
+
+EXTRA_OECARGO_PATHS ??= ""
+
+EXPORT_FUNCTIONS do_configure