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rust: Enable baremetal targets

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Allow rust to build for baremetal targets by generating the proper target
triple, follow the format specified by rusts Triple [1], that is:

<arch>-<vendor>-<os>-<abi>

This is done automatically based on both TARGET_OS and TCLIBC.

For example, a riscv64 baremetal target triple would look like this:
riscv64gc-poky-none-elf

matching rusts own target triple for riscv64 according to platform-support [2]

[1] https://docs.rs/target-lexicon/latest/target_lexicon/struct.Triple.html
[2] https://doc.rust-lang.org/stable/rustc/platform-support.html

(From OE-Core rev: 3bff689f0c5ea73076ce0510872b0552e8660cbe)

Signed-off-by: Alejandro Enedino Hernandez Samaniego <alejandro@enedino.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Alejandro Hernandez Samaniego
2022-12-15 00:32:24 -07:00
committed by Richard Purdie
parent cb33d63060
commit 901f7ed6ba
2 changed files with 10 additions and 1 deletions
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meta/classes-recipe/rust-common.bbclass
+6
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@@ -66,6 +66,12 @@ def rust_base_triple(d, thing):
elif "musl" in os:
libc = "-musl"
os = "linux"
elif "elf" in os:
libc = "-elf"
os = "none"
elif "eabi" in os:
libc = "-eabi"
os = "none"
return arch + vendor + '-' + os + libc