dev-lang/rust: revbump 1.40.0 with fixes

add parallel-compiler useflag, to use pass RUSTFLAGS=" -Zthreads=<num>"
add debian soname patch
add system-bootstrap
install rustlib into /usr/lib unconditionally
drop multilib hacks
various minor fixes
add myself to metadata.xml explicitly

Bug: https://bugs.gentoo.org/694248
Bug: https://bugs.gentoo.org/703744
Bug: https://bugs.gentoo.org/703470
Package-Manager: Portage-2.3.84, Repoman-2.3.20
Signed-off-by: Georgy Yakovlev <[email protected]>

dev-lang/rust/files/1.40.0-add-soname.patch

@@ -0,0 +1,36 @@
+Description: Set DT_SONAME when building dylibs
+ In Rust, library filenames include a version-specific hash to help
+ the run-time linker find the correct version. Unlike in C/C++, the
+ compiler looks for all libraries matching a glob that ignores the
+ hash and reads embedded metadata to work out versions, etc.
+ .
+ The upshot is that there is no need for the usual "libfoo.so ->
+ libfoo-1.2.3.so" symlink common with C/C++ when building with Rust,
+ and no need to communicate an alternate filename to use at run-time
+ vs compile time. If linking to a Rust dylib from C/C++ however, a
+ "libfoo.so -> libfoo-$hash.so" symlink may well be useful and in
+ this case DT_SONAME=libfoo-$hash.so would be required. More
+ mundanely, various tools (eg: dpkg-shlibdeps) complain if they don't
+ find DT_SONAME on shared libraries in public directories.
+ .
+ This patch passes -Wl,-soname=$outfile when building dylibs (and
+ using a GNU linker).
+Author: Angus Lees <[email protected]>
+Forwarded: no
+
+--- a/src/librustc_codegen_ssa/back/link.rs
++++ b/src/librustc_codegen_ssa/back/link.rs
+@@ -1034,6 +1034,13 @@
+ cmd.args(&rpath::get_rpath_flags(&mut rpath_config));
+ }
+
++ if (crate_type == config::CrateType::Dylib || crate_type == config::CrateType::Cdylib)
++ && t.options.linker_is_gnu {
++ let filename = String::from(out_filename.file_name().unwrap().to_str().unwrap());
++ let soname = [String::from("-Wl,-soname=") + &filename];
++ cmd.args(&soname);
++ }
++
+ // Finally add all the linker arguments provided on the command line along
+ // with any #[link_args] attributes found inside the crate
+ if let Some(ref args) = sess.opts.cg.link_args {

dev-lang/rust/metadata.xml

@@ -1,6 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
 <pkgmetadata>
+ <maintainer type="person">
+ <email>[email protected]</email>
+ <name>Georgy Yakovlev</name>
+ </maintainer>
  <maintainer type="project">
  <email>[email protected]</email>
  <name>Rust Project</name>
@@ -9,8 +13,10 @@
  <flag name="clippy">Install clippy component</flag>
  <flag name="system-llvm">Use the system LLVM install</flag>
  <flag name="nightly">Enable nightly (UNSTABLE) features</flag>
+ <flag name="parallel-compiler">Build a multi-threaded rustc</flag>
  <flag name="rls">Install rls component</flag>
  <flag name="rustfmt">Install rustfmt component</flag>
+ <flag name="system-bootstrap">Bootstrap using installed rust compiler</flag>
  <flag name="wasm">Build support for the wasm32-unknown-unknown
  target</flag>
  </use>

dev-lang/rust/rust-1.40.0-r1.ebuild

@@ -0,0 +1,340 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python2_7 python3_{5,6,7} pypy )
+
+inherit bash-completion-r1 check-reqs estack flag-o-matic llvm multiprocessing multilib-build python-any-r1 rust-toolchain toolchain-funcs
+
+if [[ ${PV} = *beta* ]]; then
+ betaver=${PV//*beta}
+ BETA_SNAPSHOT="${betaver:0:4}-${betaver:4:2}-${betaver:6:2}"
+ MY_P="rustc-beta"
+ SLOT="beta/${PV}"
+ SRC="${BETA_SNAPSHOT}/rustc-beta-src.tar.xz"
+else
+ ABI_VER="$(ver_cut 1-2)"
+ SLOT="stable/${ABI_VER}"
+ MY_P="rustc-${PV}"
+ SRC="${MY_P}-src.tar.xz"
+ KEYWORDS="~amd64 ~arm ~arm64 ~ppc64 ~x86"
+fi
+
+RUST_STAGE0_VERSION="1.$(($(ver_cut 2) - 1)).0"
+
+DESCRIPTION="Systems programming language from Mozilla"
+HOMEPAGE="https://www.rust-lang.org/"
+
+SRC_URI="
+ https://static.rust-lang.org/dist/${SRC} -> rustc-${PV}-src.tar.xz
+ !system-bootstrap? ( $(rust_all_arch_uris rust-${RUST_STAGE0_VERSION}) )
+"
+
+ALL_LLVM_TARGETS=( AArch64 AMDGPU ARM BPF Hexagon Lanai Mips MSP430
+ NVPTX PowerPC RISCV Sparc SystemZ WebAssembly X86 XCore )
+ALL_LLVM_TARGETS=( "${ALL_LLVM_TARGETS[@]/#/llvm_targets_}" )
+LLVM_TARGET_USEDEPS=${ALL_LLVM_TARGETS[@]/%/?}
+
+LICENSE="|| ( MIT Apache-2.0 ) BSD-1 BSD-2 BSD-4 UoI-NCSA"
+
+IUSE="clippy cpu_flags_x86_sse2 debug doc libressl nightly parallel-compiler rls rustfmt system-bootstrap system-llvm wasm ${ALL_LLVM_TARGETS[*]}"
+
+# Please keep the LLVM dependency block separate. Since LLVM is slotted,
+# we need to *really* make sure we're not pulling more than one slot
+# simultaneously.
+
+# How to use it:
+# 1. List all the working slots (with min versions) in ||, newest first.
+# 2. Update the := to specify *max* version, e.g. < 10.
+# 3. Specify LLVM_MAX_SLOT, e.g. 9.
+LLVM_DEPEND="
+ || (
+ sys-devel/llvm:9[llvm_targets_WebAssembly?]
+ wasm? ( =sys-devel/lld-9* )
+ )
+ <sys-devel/llvm-10:=
+"
+LLVM_MAX_SLOT=9
+
+# FIXME:
+# this should be '>=virtual/rust-1.$(($(ver_cut 2) - 1))', but we can't do it yet
+# as the first gentoo-built rust that can bootstap new compiler is 1.40.0-r1
+BOOTSTRAP_DEPEND="|| ( =dev-lang/rust-${PF} =dev-lang/rust-bin-${PV}* )"
+
+COMMON_DEPEND="
+ sys-libs/zlib
+ !libressl? ( dev-libs/openssl:0= )
+ libressl? ( dev-libs/libressl:0= )
+ net-libs/libssh2
+ net-libs/http-parser:=
+ net-misc/curl[ssl]
+ system-llvm? (
+ ${LLVM_DEPEND}
+ dev-util/cmake
+ dev-util/ninja
+ )
+"
+
+DEPEND="${COMMON_DEPEND}
+ ${PYTHON_DEPS}
+ || (
+ >=sys-devel/gcc-4.7
+ >=sys-devel/clang-3.5
+ )
+ system-bootstrap? ( ${BOOTSTRAP_DEPEND} )
+"
+
+RDEPEND="${COMMON_DEPEND}
+ >=app-eselect/eselect-rust-20190311
+"
+
+REQUIRED_USE="|| ( ${ALL_LLVM_TARGETS[*]} )
+ parallel-compiler? ( nightly )
+ wasm? ( llvm_targets_WebAssembly )
+ x86? ( cpu_flags_x86_sse2 )
+"
+
+QA_FLAGS_IGNORED="
+ usr/bin/*-${PV}
+ usr/lib*/lib*.so
+ usr/lib/rurstlib/*/codegen-backends/librustc_codegen_llvm-llvm.so
+ usr/lib/rustlib/*/lib/lib*.so
+"
+
+QA_SONAME="usr/lib*/librustc_macros*.so"
+
+PATCHES=(
+ "${FILESDIR}"/1.36.0-libressl.patch
+ "${FILESDIR}"/1.40.0-add-soname.patch
+)
+
+S="${WORKDIR}/${MY_P}-src"
+
+toml_usex() {
+ usex "$1" true false
+}
+
+pre_build_checks() {
+ CHECKREQS_DISK_BUILD="9G"
+ eshopts_push -s extglob
+ if is-flagq '-g?(gdb)?([1-9])'; then
+ CHECKREQS_DISK_BUILD="14G"
+ fi
+ eshopts_pop
+ check-reqs_pkg_setup
+}
+
+pkg_pretend() {
+ pre_build_checks
+}
+
+pkg_setup() {
+ pre_build_checks
+ python-any-r1_pkg_setup
+ use system-llvm && llvm_pkg_setup
+}
+
+src_prepare() {
+ if ! use system-bootstrap; then
+ local rust_stage0_root="${WORKDIR}"/rust-stage0
+ local rust_stage0="rust-${RUST_STAGE0_VERSION}-$(rust_abi)"
+
+ "${WORKDIR}/${rust_stage0}"/install.sh --disable-ldconfig \
+ --destdir="${rust_stage0_root}" --prefix=/ || die
+ fi
+
+ default
+}
+
+src_configure() {
+ local rust_target="" rust_targets="" arch_cflags
+
+ # Collect rust target names to compile standard libs for all ABIs.
+ for v in $(multilib_get_enabled_abi_pairs); do
+ rust_targets="${rust_targets},\"$(rust_abi $(get_abi_CHOST ${v##*.}))\""
+ done
+ if use wasm; then
+ rust_targets="${rust_targets},\"wasm32-unknown-unknown\""
+ fi
+ rust_targets="${rust_targets#,}"
+
+ local extended="true" tools="\"cargo\","
+ if use clippy; then
+ tools="\"clippy\",$tools"
+ fi
+ if use rls; then
+ tools="\"rls\",\"analysis\",\"src\",$tools"
+ fi
+ if use rustfmt; then
+ tools="\"rustfmt\",$tools"
+ fi
+
+ local rust_stage0_root
+ if use system-bootstrap; then
+ rust_stage0_root="$(rustc --print sysroot)"
+ else
+ rust_stage0_root="${WORKDIR}"/rust-stage0
+ fi
+
+ rust_target="$(rust_abi)"
+
+ cat <<- EOF > "${S}"/config.toml
+ [llvm]
+ optimize = $(toml_usex !debug)
+ release-debuginfo = $(toml_usex debug)
+ assertions = $(toml_usex debug)
+ targets = "${LLVM_TARGETS// /;}"
+ experimental-targets = ""
+ link-shared = $(toml_usex system-llvm)
+ [build]
+ build = "${rust_target}"
+ host = ["${rust_target}"]
+ target = [${rust_targets}]
+ cargo = "${rust_stage0_root}/bin/cargo"
+ rustc = "${rust_stage0_root}/bin/rustc"
+ docs = $(toml_usex doc)
+ compiler-docs = $(toml_usex doc)
+ submodules = false
+ python = "${EPYTHON}"
+ locked-deps = true
+ vendor = true
+ extended = ${extended}
+ tools = [${tools}]
+ verbose = 2
+ [install]
+ prefix = "${EPREFIX}/usr"
+ libdir = "lib"
+ docdir = "share/doc/${PF}"
+ mandir = "share/man"
+ [rust]
+ optimize = $(toml_usex !debug)
+ debug = $(toml_usex debug)
+ debug-assertions = $(toml_usex debug)
+ default-linker = "$(tc-getCC)"
+ parallel-compiler = $(toml_usex parallel-compiler)
+ channel = "$(usex nightly nightly stable)"
+ rpath = false
+ lld = $(usex system-llvm false $(toml_usex wasm))
+ [dist]
+ src-tarball = false
+ EOF
+
+ for v in $(multilib_get_enabled_abi_pairs); do
+ rust_target=$(rust_abi $(get_abi_CHOST ${v##*.}))
+ arch_cflags="$(get_abi_CFLAGS ${v##*.})"
+
+ cat <<- EOF >> "${S}"/config.env
+ CFLAGS_${rust_target}=${arch_cflags}
+ EOF
+
+ cat <<- EOF >> "${S}"/config.toml
+ [target.${rust_target}]
+ cc = "$(tc-getBUILD_CC)"
+ cxx = "$(tc-getBUILD_CXX)"
+ linker = "$(tc-getCC)"
+ ar = "$(tc-getAR)"
+ EOF
+ if use system-llvm; then
+ cat <<- EOF >> "${S}"/config.toml
+ llvm-config = "$(get_llvm_prefix "${LLVM_MAX_SLOT}")/bin/llvm-config"
+ EOF
+ fi
+ done
+
+ if use wasm; then
+ cat <<- EOF >> "${S}"/config.toml
+ [target.wasm32-unknown-unknown]
+ linker = "$(usex system-llvm lld rust-lld)"
+ EOF
+ fi
+}
+
+src_compile() {
+ env $(cat "${S}"/config.env)\
+ "${EPYTHON}" ./x.py build -vv --config="${S}"/config.toml -j$(makeopts_jobs) \
+ --exclude src/tools/miri || die # https://github.com/rust-lang/rust/issues/52305
+}
+
+src_install() {
+ env DESTDIR="${D}" "${EPYTHON}" ./x.py install -vv --config="${S}"/config.toml \
+ --exclude src/tools/miri || die
+
+ # bug #689562, #689160
+ rm "${D}/etc/bash_completion.d/cargo" || die
+ rmdir "${D}"/etc{/bash_completion.d,} || die
+ dobashcomp build/tmp/dist/cargo-image/etc/bash_completion.d/cargo
+
+ mv "${ED}/usr/bin/rustc" "${ED}/usr/bin/rustc-${PV}" || die
+ mv "${ED}/usr/bin/rustdoc" "${ED}/usr/bin/rustdoc-${PV}" || die
+ mv "${ED}/usr/bin/rust-gdb" "${ED}/usr/bin/rust-gdb-${PV}" || die
+ mv "${ED}/usr/bin/rust-gdbgui" "${ED}/usr/bin/rust-gdbgui-${PV}" || die
+ mv "${ED}/usr/bin/rust-lldb" "${ED}/usr/bin/rust-lldb-${PV}" || die
+ mv "${ED}/usr/bin/cargo" "${ED}/usr/bin/cargo-${PV}" || die
+ if use clippy; then
+ mv "${ED}/usr/bin/clippy-driver" "${ED}/usr/bin/clippy-driver-${PV}" || die
+ mv "${ED}/usr/bin/cargo-clippy" "${ED}/usr/bin/cargo-clippy-${PV}" || die
+ fi
+ if use rls; then
+ mv "${ED}/usr/bin/rls" "${ED}/usr/bin/rls-${PV}" || die
+ fi
+ if use rustfmt; then
+ mv "${ED}/usr/bin/rustfmt" "${ED}/usr/bin/rustfmt-${PV}" || die
+ mv "${ED}/usr/bin/cargo-fmt" "${ED}/usr/bin/cargo-fmt-${PV}" || die
+ fi
+
+ # Move public shared libs to abi specific libdir
+ # Private and target specific libs MUST stay in /usr/lib/rustlib/${rust_target}/lib
+ if [[ $(get_libdir) != lib ]]; then
+ dodir /usr/$(get_libdir)
+ mv "${ED}/usr/lib"/*.so "${ED}/usr/$(get_libdir)/" || die
+ fi
+
+ dodoc COPYRIGHT
+
+ # note: eselect-rust adds EROOT to all paths below
+ cat <<-EOF > "${T}/provider-${P}"
+ /usr/bin/rustdoc
+ /usr/bin/rust-gdb
+ /usr/bin/rust-gdbgui
+ /usr/bin/rust-lldb
+ EOF
+ echo /usr/bin/cargo >> "${T}/provider-${P}"
+ if use clippy; then
+ echo /usr/bin/clippy-driver >> "${T}/provider-${P}"
+ echo /usr/bin/cargo-clippy >> "${T}/provider-${P}"
+ fi
+ if use rls; then
+ echo /usr/bin/rls >> "${T}/provider-${P}"
+ fi
+ if use rustfmt; then
+ echo /usr/bin/rustfmt >> "${T}/provider-${P}"
+ echo /usr/bin/cargo-fmt >> "${T}/provider-${P}"
+ fi
+ dodir /etc/env.d/rust
+ insinto /etc/env.d/rust
+ doins "${T}/provider-${P}"
+}
+
+pkg_postinst() {
+ eselect rust update --if-unset
+
+ elog "Rust installs a helper script for calling GDB and LLDB,"
+ elog "for your convenience it is installed under /usr/bin/rust-{gdb,lldb}-${PV}."
+
+ ewarn "cargo is now installed from dev-lang/rust{,-bin} instead of dev-util/cargo."
+ ewarn "This might have resulted in a dangling symlink for /usr/bin/cargo on some"
+ ewarn "systems. This can be resolved by calling 'sudo eselect rust set ${P}'."
+
+ if has_version app-editors/emacs; then
+ elog "install app-emacs/rust-mode to get emacs support for rust."
+ fi
+
+ if has_version app-editors/gvim || has_version app-editors/vim; then
+ elog "install app-vim/rust-vim to get vim support for rust."
+ fi
+}
+
+pkg_postrm() {
+ eselect rust cleanup
+}