Bug 872533 – >=dev-lang/rust-1.64.0: armv7-musl is configured as armv7-unknown-linux-gnueabihf

• Status: UNCONFIRMED
• Product: Gentoo Linux

[Description tt_1 2022-09-23 15:20:27 UTC]

Created attachment 813817 [details]
output of emerge --info

hey there, 

I wonder what kind of rust host does the rust team want to see running on armv7+musl in the future? 

right now, it does default to the glibc rust host: 

[build]
build-stage = 2
test-stage = 2
doc-stage = 2
build = "armv7-unknown-linux-gnueabihf"
host = ["armv7-unknown-linux-gnueabihf"]
target = ["armv7-unknown-linux-gnueabihf"]
cargo = "/usr/lib/rust/1.63.0/bin/cargo"
rustc = "/usr/lib/rust/1.63.0/bin/rustc"
rustfmt = "/usr/lib/rust/1.63.0/bin/rustfmt"
incremental = false
default-linker = "armv7a-unknown-linux-musleabihf-gcc"
parallel-compiler = false
[dist]
src-tarball = false
compression-formats = ["xz"]
[target.armv7-unknown-linux-gnueabihf]
ar = "armv7a-unknown-linux-musleabihf-ar"
cc = "armv7a-unknown-linux-musleabihf-gcc"
cxx = "armv7a-unknown-linux-musleabihf-g++"
linker = "armv7a-unknown-linux-musleabihf-gcc"
ranlib = "armv7a-unknown-linux-musleabihf-ranlib"
llvm-libunwind = "no"
crt-static = false

(I removed non relevant parts for an easier read, full config.toml will be attached)

[Comment 1 tt_1 2022-09-23 15:21:24 UTC]

Created attachment 813820 [details]
full config.toml

[Comment 2 tt_1 2022-09-23 15:22:24 UTC]

output of emerge -pv =dev-lang/rust-1.64.0::gentoo

[ebuild     U #] dev-lang/rust-1.64.0:stable/1.64::gentoo [1.63.0:stable/1.63::smaeul] USE="dist system-bootstrap -clippy -debug -doc (-llvm-libunwind) (-miri) -nightly (-parallel-compiler) -profiler% -rls -rust-analyzer% -rust-src% -rustfmt -system-llvm -test -verify-sig -wasm" CPU_FLAGS_ARM="(-neon%) (-thumb2%)" LLVM_TARGETS="(ARM) -AArch64 -AMDGPU -AVR -BPF -Hexagon -Lanai -MSP430 -Mips -NVPTX -PowerPC -RISCV -Sparc -SystemZ -WebAssembly -X86 -XCore" 0 KiB

Total: 1 package (1 upgrade), Size of downloads: 0 KiB

[Comment 3 Georgy Yakovlev 2022-09-24 21:30:21 UTC]

nothing changed in this area with rust-1.64,

eclass (rust-toolchain) forces this because we have no installer.

currently we use this as reference

https://forge.rust-lang.org/infra/other-installation-methods.html

so if this page does not have musl installer we force glibc host.


as for the future, a variant of this https://github.com/gentoo/gentoo/pull/20727
will be implemented, currently in progress.


you'd be able to set any rust triplet in make.conf, and ours will come from profiles.

support for extra triplets on some profiles is also planned (like thumb-neon on arm in addition to regular host)

[Comment 4 Georgy Yakovlev 2022-09-24 21:32:47 UTC]

and ofc rust-toolchain will be reworked or obsoleted completely.
it's inflexible.