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rustc: new virtual package

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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>
This commit is contained in:
Eric Le Bihan 2018-02-04 19:07:40 +01:00 committed by Peter Korsgaard
parent 5b679d7806
commit 40e6e08d0b
3 changed files with 52 additions and 0 deletions
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1
package/Config.in.host
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@ -46,6 +46,7 @@ menu "Host utilities"
source "package/qemu/Config.in.host"
source "package/raspberrypi-usbboot/Config.in.host"
source "package/rauc/Config.in.host"
source "package/rustc/Config.in.host"
source "package/s6-rc/Config.in.host"
source "package/sam-ba/Config.in.host"
source "package/squashfs/Config.in.host"

31
package/rustc/Config.in.host Normal file
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@ -0,0 +1,31 @@
config BR2_PACKAGE_HOST_RUSTC_ARCH_SUPPORTS
bool
depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"
# The pre-built Rust standard library is only available for the
# following architectures/ABIs, and is built against glibc.
default y if BR2_i386
default y if BR2_x86_64
default y if BR2_aarch64
default y if BR2_arm && !BR2_ARM_CPU_ARMV4 && !BR2_ARM_CPU_ARMV5
default y if BR2_powerpc || BR2_powerpc64
default y if (BR2_mips || BR2_mipsel) && !BR2_MIPS_CPU_MIPS32R6
default y if (BR2_mips64 || BR2_mips64el) && !BR2_MIPS_CPU_MIPS64R6 \
&& BR2_MIPS_NABI64
depends on BR2_TOOLCHAIN_USES_GLIBC
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
config BR2_PACKAGE_HAS_HOST_RUSTC
bool
config BR2_PACKAGE_PROVIDES_HOST_RUSTC
string

20
package/rustc/rustc.mk Normal file
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@ -0,0 +1,20 @@
################################################################################
#
# rustc
#
################################################################################
RUSTC_ARCH = $(call qstrip,$(BR2_PACKAGE_HOST_RUSTC_ARCH))
RUSTC_ABI = $(call qstrip,$(BR2_PACKAGE_HOST_RUSTC_ABI))
RUST_TARGET_NAME = $(RUSTC_ARCH)-unknown-linux-gnu$(RUSTC_ABI)
ifeq ($(HOSTARCH),x86)
RUSTC_HOST_ARCH = i686
else
RUSTC_HOST_ARCH = $(HOSTARCH)
endif
RUST_HOST_NAME = $(RUSTC_HOST_ARCH)-unknown-linux-gnu
$(eval $(host-virtual-package))