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kumquat-buildroot/package/rustc/Config.in.host

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rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
# All host rust packages should depend on this option
rustc: new virtual package 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>
2018-02-04 19:07:40 +01:00
config BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS
rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
bool
default y if BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
package/rustc: add support for Tier 1 and Tier 2 platforms This commit reworks how BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS is defined to more clearly map with the list of platforms supported by Rust as listed at https://doc.rust-lang.org/nightly/rustc/platform-support.html. Indeed, the situation is not as simple as a list of architectures, all supported for both glibc and musl. So instead, we take the approach of directly mapping with what's described at https://doc.rust-lang.org/nightly/rustc/platform-support.html, which means: * A list of Tier 1 platforms (in fact just 3 platforms) * A list of Tier 2 platforms with host tools (i.e where rustc and cargo themselves are available for the target, something that isn't relevant for Buildroot) * A list of Tier 2 platforms with no host tools support. For each platform, we add as a comment its Rust tuple name, as listed at https://doc.rust-lang.org/nightly/rustc/platform-support.html, and then the corresponding Buildroot architecture/libc dependency. This is obviously more verbose than it was, but it is also a lot easier to maintain. With this, a total of 16 new platforms are supported, 13 of which are musl-based. The additional non-musl platforms are ARMv5TE, RISC-V 64-bit and Sparc64. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2021-05-18 22:54:31 +02:00
# The pre-built Rust standard library is only available for a number
# of architectures/C libraries combinations, with different levels of
# support: Tier 1 platforms, Tier 2 platforms with host tools, Tier 2
# platforms, Tier 3 platforms. Below, we support Tier 1, Tier 2 with
# host tools and Tier 2 platforms.
# The below entries match Tier 1 platforms as described at
# https://doc.rust-lang.org/nightly/rustc/platform-support.html.
config BR2_PACKAGE_HOST_RUSTC_TARGET_TIER1_PLATFORMS
bool
# aarch64-unknown-linux-gnu
default y if BR2_aarch64 && BR2_TOOLCHAIN_USES_GLIBC
# i686-unknown-linux-gnu
default y if (BR2_i686 || BR2_x86_pentiumpro || BR2_X86_CPU_HAS_MMX) && BR2_TOOLCHAIN_USES_GLIBC
# x86_64-unknown-linux-gnu
default y if BR2_x86_64 && BR2_TOOLCHAIN_USES_GLIBC
# The below entries match Tier 2 platforms with host tools as
# described at
# https://doc.rust-lang.org/nightly/rustc/platform-support.html.
config BR2_PACKAGE_HOST_RUSTC_TARGET_TIER2_HOST_TOOLS_PLATFORMS
bool
# aarch64-unknown-linux-musl
default y if BR2_aarch64 && BR2_TOOLCHAIN_USES_MUSL
# arm-unknown-linux-gnueabi
default y if BR2_ARM_CPU_ARMV6 && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_GLIBC
# arm-unknown-linux-gnueabihf
default y if BR2_ARM_CPU_ARMV6 && BR2_ARM_EABIHF && BR2_TOOLCHAIN_USES_GLIBC
# armv7-unknown-linux-gnueabihf
default y if BR2_ARM_CPU_ARMV7A && BR2_ARM_EABIHF && BR2_TOOLCHAIN_USES_GLIBC
# mips-unknown-linux-gnu
default y if BR2_mips && BR2_TOOLCHAIN_USES_GLIBC && !BR2_MIPS_CPU_MIPS32R6
# mips64-unknown-linux-gnuabi64
default y if BR2_mips64 && BR2_TOOLCHAIN_USES_GLIBC && BR2_MIPS_NABI64 && !BR2_MIPS_CPU_MIPS32R6
# mipsel-unknown-linux-gnu
default y if BR2_mipsel && BR2_TOOLCHAIN_USES_GLIBC && !BR2_MIPS_CPU_MIPS32R6
# mips64el-unknown-linux-gnuabi64
default y if BR2_mips64el && BR2_TOOLCHAIN_USES_GLIBC && BR2_MIPS_NABI64 && !BR2_MIPS_CPU_MIPS32R6
# powerpc-unknown-linux-gnu
default y if BR2_powerpc && BR2_TOOLCHAIN_USES_GLIBC
# powerpc64-unknown-linux-gnu
default y if BR2_powerpc64 && BR2_TOOLCHAIN_USES_GLIBC
# powerpc64le-unknown-linux-gnu
default y if BR2_powerpc64le && BR2_TOOLCHAIN_USES_GLIBC
# riscv64gc-unknown-linux-gnu
# "g" stands for imafd, and we also need "c".
default y if BR2_riscv && BR2_RISCV_ISA_RVI && BR2_RISCV_ISA_RVM && \
BR2_RISCV_ISA_RVA && BR2_RISCV_ISA_RVF && \
BR2_RISCV_ISA_RVD && BR2_RISCV_ISA_RVC && \
BR2_TOOLCHAIN_USES_GLIBC
# x86_64-unknown-linux-musl
default y if BR2_x86_64 && BR2_TOOLCHAIN_USES_MUSL
# The below entries match Tier 2 platforms without host tools as
# described at
# https://doc.rust-lang.org/nightly/rustc/platform-support.html.
config BR2_PACKAGE_HOST_RUSTC_TARGET_TIER2_PLATFORMS
bool
# arm-unknown-linux-musleabi
default y if BR2_ARM_CPU_ARMV6 && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_MUSL
# arm-unknown-linux-musleabihf
default y if BR2_ARM_CPU_ARMV6 && BR2_ARM_EABIHF && BR2_TOOLCHAIN_USES_MUSL
# armv5te-unknown-linux-gnueabi
default y if BR2_ARM_CPU_ARMV5 && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_GLIBC
# armv5te-unknown-linux-musleabi
default y if BR2_ARM_CPU_ARMV5 && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_MUSL
# armv7-unknown-linux-gnueabi
default y if BR2_ARM_CPU_ARMV7A && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_GLIBC
# armv7-unknown-linux-musleabi
default y if BR2_ARM_CPU_ARMV7A && BR2_ARM_EABI && BR2_TOOLCHAIN_USES_MUSL
# armv7-unknown-linux-musleabihf
default y if BR2_ARM_CPU_ARMV7A && BR2_ARM_EABIHF && BR2_TOOLCHAIN_USES_MUSL
# i586-unknown-linux-gnu
default y if BR2_i586 && BR2_TOOLCHAIN_USES_GLIBC
# i586-unknown-linux-musl
default y if BR2_i586 && BR2_TOOLCHAIN_USES_MUSL
# i686-unknown-linux-musl
default y if (BR2_i686 || BR2_x86_pentiumpro || BR2_X86_CPU_HAS_MMX) && BR2_TOOLCHAIN_USES_MUSL
# mips-unknown-linux-musl
default y if BR2_mips && BR2_TOOLCHAIN_USES_MUSL && !BR2_MIPS_CPU_MIPS32R6
# mips64-unknown-linux-muslabi64
default y if BR2_mips64 && BR2_TOOLCHAIN_USES_MUSL && BR2_MIPS_NABI64 && !BR2_MIPS_CPU_MIPS32R6
# mips64el-unknown-linux-muslabi64
default y if BR2_mips64el && BR2_TOOLCHAIN_USES_MUSL && BR2_MIPS_NABI64 && !BR2_MIPS_CPU_MIPS32R6
# mipsel-unknown-linux-musl
default y if BR2_mipsel && BR2_TOOLCHAIN_USES_MUSL && !BR2_MIPS_CPU_MIPS32R6
# sparc64-unknown-linux-gnu
default y if BR2_sparc64 && BR2_TOOLCHAIN_USES_GLIBC
rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
# All target rust packages should depend on this option
config BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
rustc: new virtual package 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>
2018-02-04 19:07:40 +01:00
bool
package/rustc: add support for Tier 1 and Tier 2 platforms This commit reworks how BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS is defined to more clearly map with the list of platforms supported by Rust as listed at https://doc.rust-lang.org/nightly/rustc/platform-support.html. Indeed, the situation is not as simple as a list of architectures, all supported for both glibc and musl. So instead, we take the approach of directly mapping with what's described at https://doc.rust-lang.org/nightly/rustc/platform-support.html, which means: * A list of Tier 1 platforms (in fact just 3 platforms) * A list of Tier 2 platforms with host tools (i.e where rustc and cargo themselves are available for the target, something that isn't relevant for Buildroot) * A list of Tier 2 platforms with no host tools support. For each platform, we add as a comment its Rust tuple name, as listed at https://doc.rust-lang.org/nightly/rustc/platform-support.html, and then the corresponding Buildroot architecture/libc dependency. This is obviously more verbose than it was, but it is also a lot easier to maintain. With this, a total of 16 new platforms are supported, 13 of which are musl-based. The additional non-musl platforms are ARMv5TE, RISC-V 64-bit and Sparc64. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
2021-05-18 22:54:31 +02:00
default y if BR2_PACKAGE_HOST_RUSTC_TARGET_TIER1_PLATFORMS
default y if BR2_PACKAGE_HOST_RUSTC_TARGET_TIER2_HOST_TOOLS_PLATFORMS
default y if BR2_PACKAGE_HOST_RUSTC_TARGET_TIER2_PLATFORMS
rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
depends on BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS
rustc: new virtual package 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>
2018-02-04 19:07:40 +01:00
config BR2_PACKAGE_HOST_RUSTC_ARCH
string
default "armv7" if BR2_ARM_CPU_ARMV7A
default BR2_ARCH if !BR2_ARM_CPU_ARMV7A
config BR2_PACKAGE_HOST_RUSTC_ABI
string
default "eabi" if BR2_ARM_EABI
default "eabihf" if BR2_ARM_EABIHF
default "abi64" if BR2_MIPS_NABI64
rust-bin: new package 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>
2018-02-04 19:07:41 +01:00
config BR2_PACKAGE_HOST_RUSTC
bool "host rustc"
depends on BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS
help
Compiler for the Rust language
http://www.rust-lang.org
if BR2_PACKAGE_HOST_RUSTC
choice
prompt "Rust compiler variant"
default BR2_PACKAGE_HOST_RUST_BIN
help
Select a Rust compiler
rust: new package 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>
2018-02-04 19:07:43 +01:00
config BR2_PACKAGE_HOST_RUST
bool "host rust"
package/rustc: RUSTC_TARGET_NAME is needed to build host-rust As reported on bugzilla [1], the host-rust package fail when the target architecture or the target libc is not supported. The error is the following: failed to parse TOML configuration 'config.toml': expected a table key, found a right bracket at line 15 In such case BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS is not set thus RUSTC_TARGET_NAME is also not set [2]. But RUSTC_TARGET_NAME is needed to generate the file config.toml [3] Add BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS in the host-rust dependency. The commit [4] that allowed to select host-rust when the target architecture or the target libc is not supported, should have allowed to select only host-rustc-bin. Fixes: Bug #12691 [1] https://bugs.busybox.net/show_bug.cgi?id=12691 [2] https://git.buildroot.net/buildroot/tree/package/rustc/rustc.mk?h=2020.05-rc1#n10 [3] https://git.buildroot.net/buildroot/tree/package/rust/rust.mk?h=2020.05-rc1#n41 [4] 025b863e6facb7b219b82ee6ee7a7916c2c3c47e Signed-off-by: Romain Naour <romain.naour@gmail.com> Cc: Sam Voss <sam.voss@gmail.com> Reviewed-by: Sam Voss <sam.voss@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2020-05-08 17:27:39 +02:00
# RUSTC_TARGET_NAME must be set for building host-rust
# otherwise config.toml is broken.
depends on BR2_PACKAGE_HOST_RUSTC_TARGET_ARCH_SUPPORTS
rust: new package 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>
2018-02-04 19:07:43 +01:00
# triggers ICE on trunc_int_for_mode, at explow.c:56
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5 || !BR2_aarch64
help
This package will build the compiler for the host as well as
two flavors of the standard library: one for the host, another
for the target. Both are installed in the host directory.
comment "host-rust needs a toolchain w/ gcc >= 5"
depends on BR2_aarch64
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_5
rust-bin: new package 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>
2018-02-04 19:07:41 +01:00
config BR2_PACKAGE_HOST_RUST_BIN
bool "host rust (pre-built)"
help
This package will install pre-built versions of the compiler
for the host and the Rust standard library for the target.
endchoice
rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
endif
rustc: new virtual package 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>
2018-02-04 19:07:40 +01:00
config BR2_PACKAGE_PROVIDES_HOST_RUSTC
string
rust: new package 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>
2018-02-04 19:07:43 +01:00
default "host-rust" if BR2_PACKAGE_HOST_RUST
rust: modify Rust packaging to be usable as host-tool only 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>
2018-08-23 00:33:50 +02:00
# Default to host-rust-bin as long as host arch supports it
default "host-rust-bin" if !BR2_PACKAGE_HOST_RUST
depends on BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS
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