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error[E0463]: can't find crate for core when cargo bootimage #1033

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BackMountainDevil opened this issue Jul 7, 2021 · 4 comments
Closed

error[E0463]: can't find crate for core when cargo bootimage #1033

BackMountainDevil opened this issue Jul 7, 2021 · 4 comments

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@BackMountainDevil
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What happened？

It got error when I run cargo bootimage to get an image.

  • error[E0463]: can't find crate for core

env

  • OS: Linux arch 5.10.47-1-lts x86_64 GNU/Linux
  • rustc 1.55.0-nightly (e8cb1a4a5 2021-06-27)
  • cargo 1.55.0-nightly (9233aa06c 2021-06-22)
  • target = "x86_64-blog_os.json"

How that happen

I follow your blog in Chinese version.

fine

$  cargo build --target x86_64-blog_os.json
   Compiling os v0.1.0 (/home/kearney/Documents/code/rust/os-rust/os)
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

This error is the same as the blog. So it is fine

$ cargo install cargo-xbuild
    Updating `https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git` index
     Ignored package `cargo-xbuild v0.6.5` is already installed, use --force to override

$ rustup component add rust-src
info: component 'rust-src' is up to date

$ cargo xbuild
   Compiling compiler_builtins v0.1.46
   Compiling core v0.0.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling rustc-std-workspace-core v1.99.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/tmp/cargo-xbuildczo8s8)
    Finished release [optimized] target(s) in 11.29s
   Compiling os v0.1.0 (/home/kearney/Documents/code/rust/os-rust/os)
    Finished dev [unoptimized + debuginfo] target(s) in 0.27s

$ cargo install bootimage
    Updating `https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git` index
   Installed package `bootimage v0.10.3` (executables `bootimage`, `cargo-bootimage`)

$ rustup component add llvm-tools-preview
info: component 'llvm-tools-preview' for target 'x86_64-unknown-linux-gnu' is up to date

Now everyhing is ok until next step.

wrong situation

If below step work. it should not get error. So I can continue toqemu-system-x86_64 -drive format=raw,file=bootimage-blog_os.bin ..

$  cargo bootimage
WARNING: `CARGO_MANIFEST_DIR` env variable not set
Building kernel
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `bootloader`

To learn more, run the command again with --verbose.
Error: Kernel build failed.
Stderr: 

$ > cargo bootimage
Error: Please invoke bootimage with a subcommand. See `bootimage --help` for more information.

Some solution

reinstall bootimage from your home directory

#853

Try running cargo install bootimage from your home directory instead of the project directory.

cd ~
cargo install bootimage --force

turn to project dir. Not work..

$ cargo clean
$ cargo xbuild
   Compiling core v0.0.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling compiler_builtins v0.1.46
   Compiling rustc-std-workspace-core v1.99.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/tmp/cargo-xbuild8HbCtr)
   Compiling bootloader v0.9.18
   Compiling os v0.1.0 (/home/kearney/Documents/code/rust/os-rust/os)
    Finished dev [unoptimized + debuginfo] target(s) in 0.44s

$ cargo bootimage
WARNING: `CARGO_MANIFEST_DIR` env variable not set
Building kernel
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `bootloader`

To learn more, run the command again with --verbose.
Error: Kernel build failed.
Stderr:

emm confused

#837
#835

I just updated the blog to use standard cargo build instead of cargo-xbuild in #835.

Does that mean use build? but belows tells it not. So I turn to the English version web. The steps is same as the Chinese version...

$ cargo clean
$ cargo build
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`
@bjorn3
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Contributor

bjorn3 commented Jul 7, 2021

Have you enabled build-std in .cargo/config.toml?

[unstable]
build-std-features = ["compiler-builtins-mem"]
build-std = ["core", "compiler_builtins"]

@BackMountainDevil
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Author

oh, my dear friend. Thank you for you advics. I follow your advics so

# enabled build-std in .cargo/config.toml
$ cargo clean
$ cargo build --target x86_64-blog_os.json
warning: unused manifest key: unstable
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

error: could not compile `bootloader`

$ cargo install cargo-xbuild
    Updating `https://mirrors.tuna.tsinghua.edu.cn/git/crates.io-index.git` index
     Ignored package `cargo-xbuild v0.6.5` is already installed, use --force to override

$ cargo xbuild --target x86_64-blog_os.json
   Compiling core v0.0.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core)
   Compiling compiler_builtins v0.1.46
   Compiling rustc-std-workspace-core v1.99.0 (/home/kearney/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/rustc-std-workspace-core)
   Compiling alloc v0.0.0 (/tmp/cargo-xbuildz13f2t)
    Finished release [optimized] target(s) in 11.13s
warning: unused manifest key: unstable
   Compiling bootloader v0.9.18
   Compiling os v0.1.0 (/home/kearney/Documents/code/rust/os-rust/os)
    Finished dev [unoptimized + debuginfo] target(s) in 0.52s

$ cargo bootimage
WARNING: `CARGO_MANIFEST_DIR` env variable not set
Building kernel
warning: unused manifest key: unstable
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `bootloader`

To learn more, run the command again with --verbose.
Error: Kernel build failed.
Stderr:

try build -Zbuild-std but failed

$ cargo build -Zbuild-std
$ cargo clean
$ cargo xbuild
    Finished release [optimized] target(s) in 11.39s
warning: unused manifest key: unstable
   Compiling bootloader v0.9.18
    Finished dev [unoptimized + debuginfo] target(s) in 0.95s

$ cargo bootimage
WARNING: `CARGO_MANIFEST_DIR` env variable not set
Building kernel
warning: unused manifest key: unstable
   Compiling bootloader v0.9.18
error[E0463]: can't find crate for `core`
  |
  = note: the `x86_64-blog_os-9626546152685556648` target may not be installed
  = help: consider downloading the target with `rustup target add x86_64-blog_os-9626546152685556648`
  = help: consider building the standard library from source with `cargo build -Zbuild-std`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0463`.
error: could not compile `bootloader`

Then I try reinstall bootimage from home directory but got the same error.

@BackMountainDevil
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Author

I will fix this someday in the future. But not now

@s0ubhik
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s0ubhik commented Apr 5, 2023

You have to build it with nightly channel

# blog_os/rust-tootlchain.toml
[toolchain]
channel = "nightly"

and then run

cargo build
rustup component add rust-src --toolchain nightly-x86_64-unknown-linux-gnu
cargo build

Done

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3 participants
@bjorn3 @s0ubhik @BackMountainDevil