[Buildroot] [Patch v4 3/3] rust: new package
Eric Le Bihan
eric.le.bihan.dev at free.fr
Sun Apr 2 19:46:51 UTC 2017
This new package provides the compiler for the Rust programming language.
Currently, only the host variant is built.
The Rust compiler uses LLVM as its backend: a copy of LLVM source code
is provided and CMake is used to build it. It is possible to use a
pre-built external copy. When LLVM/clang will be available in Buildroot,
it would be possible to benefit from this feature and thus decrease
build time.
LLVM is configured to generate code for x86, ARM, PowerPC and MIPS
architectures.
The Rust compiler uses Cargo as its build system and is written in Rust.
Therefore this package depends on cargo-bootstrap and rust-bootstrap.
The internal build process is as follows:
1. rustc-stage0, provided by rust-bootstrap, is used to build
rustc-stage1.
2. rust-stage1 builds the final Rust compiler (rust-stage2)
and the standard library for the host architecture.
3. the standard library for the target architecture is built.
The target architecture to support is given by the GNU/LLVM target
triple. Rust supports some predefined targets [1]. As the build system
expects the triple to be in the form of <arch>-unknown-<system> and
Buildroot toolchain wrapper uses <arch>-buildroot-<system>, the package
Makefile defines the $(RUST_TARGET_NAME) and uses it instead of
$(GNU_TARGET_NAME).
When compiling Rust code with this compiler, the generated program only
depends on the target C library, as it is statically linked to the Rust
standard library and any other code from Rust packages (a.k.a.
"crates").
If the jemalloc package is selected, support for this memory allocator
will be enabled in the target standard library.
[1] https://forge.rust-lang.org/platform-support.html
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev at free.fr>
---
DEVELOPERS | 1 +
package/Config.in.host | 1 +
package/rust/Config.in.host | 33 ++++++++++++++++++
package/rust/rust.hash | 2 ++
package/rust/rust.mk | 85 +++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 122 insertions(+)
create mode 100644 package/rust/Config.in.host
create mode 100644 package/rust/rust.hash
create mode 100644 package/rust/rust.mk
diff --git a/DEVELOPERS b/DEVELOPERS
index 1fed408..c0e7833 100644
--- a/DEVELOPERS
+++ b/DEVELOPERS
@@ -450,6 +450,7 @@ F: package/hicolor-icon-theme/
F: package/jemalloc/
F: package/ninja/
F: package/rust-bootstrap
+F: package/rust
F: package/s6/
F: package/s6-dns/
F: package/s6-linux-init/
diff --git a/package/Config.in.host b/package/Config.in.host
index 38f919a..ef5f23f 100644
--- a/package/Config.in.host
+++ b/package/Config.in.host
@@ -39,6 +39,7 @@ menu "Host utilities"
source "package/python-lxml/Config.in.host"
source "package/qemu/Config.in.host"
source "package/raspberrypi-usbboot/Config.in.host"
+ source "package/rust/Config.in.host"
source "package/s6-rc/Config.in.host"
source "package/sam-ba/Config.in.host"
source "package/squashfs/Config.in.host"
diff --git a/package/rust/Config.in.host b/package/rust/Config.in.host
new file mode 100644
index 0000000..384a071
--- /dev/null
+++ b/package/rust/Config.in.host
@@ -0,0 +1,33 @@
+config BR2_PACKAGE_HOST_RUST_ARCH_SUPPORTS
+ bool
+ default y
+ depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
+ depends on BR2_i386 || BR2_x86_64 \
+ || BR2_arm || BR2_aarch64 \
+ || BR2_powerpc || BR2_powerpc64 \
+ || BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
+ depends on !BR2_ARM_CPU_ARMV4 && !BR2_ARM_CPU_ARMV5
+ depends on !BR2_MIPS_NABI32
+ depends on BR2_TOOLCHAIN_USES_GLIBC
+ depends on BR2_HOST_GCC_AT_LEAST_4_7 # required by LLVM
+ # triggers ICE on trunc_int_for_mode, at explow.c:56
+ depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5 || !BR2_aarch64
+
+comment "host-rust needs a toolchain w/ gcc >= 5"
+ depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_5 && BR2_aarch64
+
+config BR2_PACKAGE_HOST_RUST
+ bool "host rust"
+ depends on BR2_PACKAGE_HOST_RUST_ARCH_SUPPORTS
+ help
+ Compiler for the Rust programming language.
+
+ This package will build the compiler for the host as well as
+ a cross-compiled version of the Rust standard library for the
+ target.
+
+ Note that the target standard library does not need to be
+ present on the target root filesystem, as it is statically
+ linked to the program.
+
+ http://www.rust-lang.org
diff --git a/package/rust/rust.hash b/package/rust/rust.hash
new file mode 100644
index 0000000..3b04dfd
--- /dev/null
+++ b/package/rust/rust.hash
@@ -0,0 +1,2 @@
+# Locally calculated
+sha256 f966b31eb1cd9bd2df817c391a338eeb5b9253ae0a19bf8a11960c560f96e8b4 rustc-1.16.0-src.tar.gz
diff --git a/package/rust/rust.mk b/package/rust/rust.mk
new file mode 100644
index 0000000..12f4428
--- /dev/null
+++ b/package/rust/rust.mk
@@ -0,0 +1,85 @@
+################################################################################
+#
+# rust
+#
+################################################################################
+
+RUST_VERSION = 1.16.0
+RUST_SOURCE = rustc-$(RUST_VERSION)-src.tar.gz
+RUST_SITE = https://static.rust-lang.org/dist
+RUST_LICENSE = Apache-2.0 or MIT
+RUST_LICENSE_FILES = LICENSE-APACHE LICENSE-MIT
+
+HOST_RUST_DEPENDENCIES = \
+ toolchain \
+ host-rust-bootstrap \
+ host-cargo-bootstrap \
+ host-python \
+ host-cmake
+
+ifeq ($(BR2_PACKAGE_JEMALLOC),y)
+HOST_RUST_DEPENDENCIES += jemalloc
+HOST_RUST_JEMALLOC_ENABLED = true
+HOST_RUST_JEMALLOC_CONF = 'jemalloc = "$(STAGING_DIR)/usr/lib/libjemalloc_pic.a"'
+else
+HOST_RUST_JEMALLOC_ENABLED = false
+endif
+
+HOST_RUST_BUILD_OPTS = $(if $(VERBOSE),--verbose)
+
+RUST_TARGET_NAME := $(subst buildroot,unknown,$(GNU_TARGET_NAME))
+
+ifeq ($(BR2_ARM_CPU_ARMV7A),y)
+RUST_TARGET_NAME := $(subst arm-,armv7-,$(RUST_TARGET_NAME))
+endif
+
+ifeq ($(BR2_MIPS_NABI64),y)
+RUST_TARGET_NAME := $(subst -gnu,-gnuabi64,$(RUST_TARGET_NAME))
+endif
+
+define HOST_RUST_CONFIGURE_CMDS
+ (cd $(@D); \
+ echo '[build]' > config.toml; \
+ echo 'target = ["$(RUST_TARGET_NAME)"]' >> config.toml; \
+ echo 'cargo = "$(HOST_CARGO_BOOTSTRAP_DIR)/cargo/bin/cargo"' >> config.toml; \
+ echo 'rustc = "$(HOST_RUST_BOOTSTRAP_DIR)/rustc/bin/rustc"' >> config.toml; \
+ echo 'python = "$(HOST_DIR)/usr/bin/python2"' >> config.toml; \
+ echo 'submodules = false' >> config.toml; \
+ echo 'vendor = true' >> config.toml; \
+ echo 'compiler-docs = false' >> config.toml; \
+ echo 'docs = false' >> config.toml; \
+ echo '[install]' >> config.toml; \
+ echo 'prefix = "$(HOST_DIR)/usr"' >> config.toml; \
+ echo '[rust]' >> config.toml; \
+ echo 'use-jemalloc = $(HOST_RUST_JEMALLOC_ENABLED)' >> config.toml; \
+ echo '[target.$(RUST_TARGET_NAME)]' >> config.toml; \
+ echo 'cc = "$(TARGET_CROSS)gcc"' >> config.toml; \
+ echo 'cxx = "$(TARGET_CROSS)g++"' >> config.toml; \
+ echo $(HOST_RUST_JEMALLOC_CONF) >> config.toml; \
+ )
+endef
+
+define HOST_RUST_BUILD_CMDS
+ (cd $(@D); $(HOST_MAKE_ENV) $(HOST_RUST_MAKE_ENV) python2 x.py \
+ build $(HOST_RUST_BUILD_OPTS))
+endef
+
+define HOST_RUST_INSTALL_LIBSTD_TARGET
+ (cd $(@D)/build/tmp/dist/rust-std-$(RUST_VERSION)-dev-$(RUST_TARGET_NAME); \
+ ./install.sh \
+ --prefix=$(HOST_DIR)/usr \
+ --docdir=$(HOST_DIR)/usr/share/doc/rust \
+ --libdir=$(HOST_DIR)/usr/lib \
+ --mandir=$(HOST_DIR)/usr/share/man \
+ --disable-ldconfig)
+endef
+
+define HOST_RUST_INSTALL_CMDS
+ (cd $(@D); $(HOST_MAKE_ENV) $(HOST_RUST_MAKE_ENV) python2 x.py \
+ dist $(HOST_RUST_BUILD_OPTS))
+ (cd $(@D); $(HOST_MAKE_ENV) $(HOST_RUST_MAKE_ENV) python2 x.py \
+ dist --install $(HOST_RUST_BUILD_OPTS))
+ $(HOST_RUST_INSTALL_LIBSTD_TARGET)
+endef
+
+$(eval $(host-generic-package))
--
2.9.3
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