failed to run rustc to learn about target-specific information

$ cargo new aa
Created binary (application) `aa` package

$ cd aa
$ cargo build
error: failed to run `rustc` to learn about target-specific information

Caused by:
process didn't exit successfully: `rustc - --crate-name ___ --print=file-names
--crate-type bin --crate-type rlib --crate-type dylib --crate-type cdylib
--crate-type staticlib --crate-type proc-macro` (exit code: 0xc0000135,
STATUS_DLL_NOT_FOUND)

[tesuji]

Please provide more information:

• What is your operating system? What is its version? What is its architecture?
• What is your rustc version (run rustc -Vv to get output)?

so i installed rust to directory aaaaa, then symlinked rustc and cargo to directory bbbbb.

directory bbbbb is on my PATH, but not directory aaaaa. this seems to be causing the problem. if i just delete bbbbb and add aaaaa to my PATH then everything works

but other programming languages dont require this. "Go", "D" and "Nim" all work with the symlink method. Rust should too.

[tesuji]

It should. But that's often a job of rustup. How do you install rust? From rustup or
from archive? Also please provide more information listed in #61925 (comment) .

[nagisa]

My suspicion is that, with symlinking, rustc’s sysroot changes – that is where it looks for dynamic libraries such as codegen backends – which did not get symlinked along with rustc.

Can you please run rustc --print sysroot for both original installation of rustc and the symlinked rustc?

What is your rustc version (run rustc -Vv to get output)?

rustc 1.35.0 (3c235d560 2019-05-20)
binary: rustc
commit-hash: 3c235d5600393dfe6c36eeed34042efad8d4f26e
commit-date: 2019-05-20
host: x86_64-pc-windows-gnu

How do you install rust?

lessmsi x rust-1.35.0-x86_64-pc-windows-gnu.msi

Can you please run rustc --print sysroot for both original installation of
rustc

C:\Rust

and the symlinked rustc?

C:\Rust

[ehsanmok]

I've found the same issue in one of the Ubuntu 18.04 servers today. Uninstalled rustup self uninstall and did the fresh installation curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh but it cannot compile anything.

[nagisa]

Might be a separate issue, please file another one.

[ehsanmok]

@nagisa It turned out the culprit was sccache and everything is ok now.

[palfrey]

I hit this, because I had RUSTC_WRAPPER=sccache set but didn't have sccache installed yet

[mati865]

Triage: works for me.

I've tried with directory symlink and directory junction. In both cases windows-gnu cargo can compile hello-world example with only symlink/junction being available in PATH.

[Mark-Simulacrum]

I'm going to go ahead and close this per @mati865's testing. New issues can be filed if this is still a bug.