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This commit modifies the host-rust virtual package to default to
host-rust-bin when no other selection has been made, as long as the
host supports rust. This allows host only tools to still use rust when
the target architecture does not support it.
Add target-specific variable which is used to differentiate host and
target arch requirements (BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS).
A target package shall depend on this variable where a host package will
use the previously defined BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS. The new
"target" version is selectable for the same set of architectures as
before, but now depends on the host variant.
Signed-off-by: Sam Voss <sam.voss@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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This commit drops the option BR2_PACKAGE_HAS_HOST_RUSTC, which is no
longer used following commit bd425f716f0a92ef627f7287869d88ca408fe55e
("host-cargo: select host-rustc").
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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Rust supports powerpc64le to the same level as powerpc64, so allow it.
Signed-off-by: Sam Bobroff <sbobroff@linux.ibm.com>
Tested-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Acked-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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The Rust project does not support armv7a EABI, only EABIHF [1]. So
disable rustc for this ARM variant.
Fixes:
- http://autobuild.buildroot.net/results/51c98ca5486e7e83725ababa437cbb8204ceb66b/
[1] https://forge.rust-lang.org/platform-support.html
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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utils/check-package complains as follows:
package/rustc/Config.in.host:6: attributes order: type, default, depends on, select, help (http://nightly.buildroot.org/#_config_files)
package/rustc/Config.in.host:79: empty line at end of file
This patch fixes these warnings.
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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utils/check-package complains as follows:
package/rustc/rustc.mk:10: possible typo: RUST_TARGET_NAME -> *RUSTC*
package/rustc/rustc.mk:18: possible typo: RUST_HOST_NAME -> *RUSTC*
As RUST_{HOST,TARGET}_NAME are related to the Rust compiler, it
sounds sensible to rename them to RUSTC_{HOST,TARGET}_NAME.
So update all rust related packages to use the new variables.
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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This new package provides rustc, the compiler for the Rust programming
language, built from source.
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-bin and rust-bin.
The internal build process is as follows:
1. stage0 compiler, provided by rust-bin, is used to build stage1
compiler.
2. stage1 compiler builds the final Rust compiler (stage2 compiler)
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 uses $(RUST_TARGET_NAME) defined in the rustc package 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.
The menuconfig entry for rustc is also updated to expose this provider.
[1] https://forge.rust-lang.org/platform-support.html
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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This package provides a pre-built version of rustc, the compiler for the
Rust programming language, fetched from the upstream project.
A pre-built version of the standard library for the host as well as one
for the chosen target are also fetched and installed.
Only the host variant is provided to allow the user to cross-compile
Rust programs and run them on the target.
This package could also be used to provide a bootstrap compiler when building
Rust from source. So, in order to add it as a build dependency, the compiler and
standard libraries are only installed in $(HOST_DIR) if the package is
explicitly selected.
The menuconfig entry for rustc is also updated to expose this provider.
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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The compiler for the Rust programming language is called rustc.
There is only one reference implementation for it, based on LLVM, from
the Rust project [1]. It can generate code for various architectures so
it can be labeled as a cross-compiler. But, as for GCC, building it
from source takes time.
So it would be sensible to have at least one package which provides it
as a pre-built version, fetched from the upstream project. Later another
package can be added, to build it from source code.
In addition to the compiler, the standard library for the host and/or
the target should also be fetched/built.
So, add a virtual package named rustc to enable support for multiple
providers.
Currently, only the host variant will be available to allow the user to
cross-compile Rust programs for the target.
[1] http://rust-lang.org
Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
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