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jesse_m
n00b
Joined: 14 Mar 2018
Posts: 31
Location: Grand Rapids, MI
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 Posted: Tue Jan 01, 2019 1:42 am Post subject: [Solved] Cross Compiling with Rust |
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I am trying to follow along with the cross compiling guide in the Embedded Rust Book: https://docs.rust-embedded.org/book/start/qemu.html#cross-compiling
I am getting the following error when trying to run
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cargo build --target thumbv7m-none-eabi
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I get this error
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error[E0463]: can't find crate for `core`
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= note: the `thumbv7m-none-eabi` target may not be installed
error: aborting due to previous error
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I'm using rust and cargo installed from portage, not from rust up.
I thought that I had those platforms installed with llvm and rust with the following use flags:
LLVM: | Code: | | sys-devel/llvm ncurses xml libffi LLVM_TARGETS: AArch64 AMDGPU ARM BPF NVPTX RISCV |
Rust: | Code: | | dev-lang/rust clippy doc rustfmt rls system-llvm LLVM_TARGETS: X86 AArch64 ARM RISCV |
I can see the targets from llvm-config:
| Code: | llvm-config --targets-built
X86 AArch64 ARM AMDGPU NVPTX BPF
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And the print targets from rustc shows the thumb architecture:
| Code: | rustc --print target-list | grep thumb
thumbv6m-none-eabi
thumbv7a-pc-windows-msvc
thumbv7em-none-eabi
thumbv7em-none-eabihf
thumbv7m-none-eabi
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I don't know if there is anything else people have been able to do to use the Gentoo rust/cargo to build a cross compiled executable.
Last edited by jesse_m on Thu Jan 17, 2019 1:39 pm; edited 1 time in total |
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jesse_m
n00b
Joined: 14 Mar 2018
Posts: 31
Location: Grand Rapids, MI
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| Posted: Thu Jan 17, 2019 1:38 pm Post subject: |
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I found out that you can actually install rustup along side the distribution install.
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curl https://sh.rustup.rs -sSf > rustup.sh
chmod +x rustup.sh
./rustup.sh -y --no-modify-path
# Add ~/.cargo/bin to your path
rustup toolchain link system /usr
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Running "rustup default system" will make the system your default. Now you have best of both worlds and can add the cross compiled toolchains like normal.
[1] https://github.com/rust-lang/rustup.rs#working-with-distribution-rust-packages |
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