[PATCH v3 03/16] rust: install Rust library sources for target & sdk

[Harish.Sadineni@windriver.com]

From: Harish Sadineni <Harish.Sadineni@windriver.com>

The `make rustavailable` process (1) expects the Rust standard library source files (e.g., `lib.rs`)
to be present in the `library/` directory under `rustlib/src/rust/`.

This patch ensures the required sources are available by:
- Installing the `library/` directory (of size ~50MB) into `${D}${libdir}/rustlib/src/rust` for `target` class,
  making them available in them available on target.
- Installing the `library/` directory (of size ~50MB) into `${SDKPATHNATIVE}/usr/lib/rustlib/src/rust` for the
  `nativesdk` class, making them available in them available in sdk.
- packaging `${libdir}/rustlib/src/rust` sepearately with `${PN}-src-lib`.

1) See the kernel tree for Documentation/rust/quick-start.rst in the section: Requirements: Building

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/rust/quick-start.rst#n145

Signed-off-by: Harish Sadineni <Harish.Sadineni@windriver.com>
---
 meta/recipes-devtools/rust/rust_1.92.0.bb | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/meta/recipes-devtools/rust/rust_1.92.0.bb b/meta/recipes-devtools/rust/rust_1.92.0.bb
index af739df88a..eaab6a1c16 100644
--- a/meta/recipes-devtools/rust/rust_1.92.0.bb
+++ b/meta/recipes-devtools/rust/rust_1.92.0.bb
@@ -265,10 +265,11 @@ do_test_compile () {
 
 ALLOW_EMPTY:${PN} = "1"
 
-PACKAGES =+ "${PN}-rustdoc ${PN}-tools-clippy ${PN}-tools-rustfmt"
+PACKAGES =+ "${PN}-rustdoc ${PN}-tools-clippy ${PN}-tools-rustfmt ${PN}-src-lib"
 FILES:${PN}-rustdoc = "${bindir}/rustdoc"
 FILES:${PN}-tools-clippy = "${bindir}/cargo-clippy ${bindir}/clippy-driver"
 FILES:${PN}-tools-rustfmt = "${bindir}/rustfmt"
+FILES:${PN}-src-lib = "${libdir}/rustlib/src/rust"
 
 RDEPENDS:${PN}-rustdoc = "${PN}"
 RDEPENDS:${PN}-tools-clippy = "${PN}"
@@ -316,6 +317,11 @@ rust_do_install:class-nativesdk() {
 	export CARGO_TARGET_${RUST_HOST_TRIPLE}_RUNNER="\$OECORE_NATIVE_SYSROOT/lib/${SDKLOADER}"
 	export CC_$RUST_HOST_CC="${CCACHE}${HOST_PREFIX}gcc"
 	EOF
+
+    install -d ${D}${SDKPATHNATIVE}/usr/lib/rustlib/src/rust
+    cp -r ${S}/library ${D}${SDKPATHNATIVE}/usr/lib/rustlib/src/rust
+    find ${D}${libdir}/rustlib/src/rust/ -name "*.sh" -type f -delete
+
 }
 
 FILES:${PN} += "${base_prefix}/environment-setup.d"
@@ -336,6 +342,11 @@ rust_do_install:class-target() {
 
     install -d ${D}${libdir}/rustlib/${RUST_HOST_SYS}
     install -m 0644 ${WORKDIR}/rust-targets/${RUST_HOST_SYS}.json ${D}${libdir}/rustlib/${RUST_HOST_SYS}/target.json
+    install -d ${D}${libdir}/rustlib/src/rust
+    cp -r ${S}/library/ ${D}${libdir}/rustlib/src/rust/
+    find ${D}${libdir}/rustlib/src/rust/ -name "*.sh" -type f -delete
+    install -m 0644 ${WORKDIR}/rust-targets/${RUST_HOST_SYS}.json ${D}${libdir}/rustlib/${RUST_HOST_SYS}/${RUST_HOST_SYS}.json
+
 
     chown root:root ${D}/ -R
     rm ${D}${libdir}/rustlib/uninstall.sh
-- 
2.49.0