build/setup error

[nh2]

% rustup run avr-toolchain xargo build --target avr-atmega328p --release
    Updating git repository `https://github.com/avr-rust/libcore`
   Compiling core v0.1.0 (https://github.com/avr-rust/libcore?branch=rust-26015da0#ede6063b)
    Finished release [optimized] target(s) in 21.92s
error: intermittent IO error while iterating directory `/home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/bin`
caused by: IO error for operation on /home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/bin: No such file or directory (os error 2)
caused by: No such file or directory (os error 2)

Not sure what's going on, but there's clearly no bin directory in there:

niklas@llw ~/src/avr-rust/blink (git)-[master] % find /home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/
/home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/
/home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib
/home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/librustc_privacy-332844a755d8f78a.so
/home/niklas/src/avr-rust/build/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/libgraphviz-fa458b100835357c.so
...

% echo $XARGO_RUST_SRC
../rust

% echo $RUST_TARGET_PATH
/home/niklas/src/avr-rust/blink

% git rev-parse HEAD
e2053a60069536eb09f0a98e0d347b6a8ae9643a

What can I do about this?

[nh2]

And I'm on https://github.com/avr-rust/rust commit 9f8c381a275b9.

[nh2]

Got it to work:

First I switched the toolchain to the --prefix I had given (I think this doesn't really matter, just giving it to not confuse people who read this why the paths involved changed):

% rustup toolchain link avr-toolchain $HOME/opt/avr-rust                

So we see the same error:

% rustup run avr-toolchain xargo build --target avr-atmega328p --release
error: intermittent IO error while iterating directory `/home/niklas/opt/avr-rust/lib/rustlib/x86_64-unknown-linux-gnu/bin`
caused by: IO error for operation on /home/niklas/opt/avr-rust/lib/rustlib/x86_64-unknown-linux-gnu/bin: No such file or directory (os error 2)
caused by: No such file or directory (os error 2)

Just create the empty dir it wants:

% mkdir /home/niklas/opt/avr-rust/lib/rustlib/x86_64-unknown-linux-gnu/bin

New error:

% rustup run avr-toolchain xargo build --target avr-atmega328p --release
 Downloading arduino v0.1.0
   Compiling arduino v0.1.0                                                     
   Compiling blink v0.1.0 (file:///home/niklas/src/avr-rust/blink)
error: could not exec the linker `avr-gcc`: No such file or directory (os error 2)
  |
  = note: "avr-gcc" "-Os" "-mmcu=atmega328p" "-L" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/blink-facf8a50db6ed10f.0.o" "-o" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/blink-facf8a50db6ed10f.elf" "-Wl,--gc-sections" "-L" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps" "-L" "/home/niklas/src/avr-rust/blink/target/release/deps" "-L" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib" "-Wl,-Bstatic" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/libarduino-067d1a06a38a989a.rlib" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib/libcore-bb715acab4a13477.rlib" "-Wl,-Bdynamic" "-Wl,--gc-sections"

error: aborting due to previous error

error: Could not compile `blink`.

To learn more, run the command again with --verbose.

OK, looks like there's an undocumented dependency on gcc-avr:

% sudo apt install gcc-avr

Now we get:

 % rustup run avr-toolchain xargo build --target avr-atmega328p --release  
   Compiling blink v0.1.0 (file:///home/niklas/src/avr-rust/blink)
error: linking with `avr-gcc` failed: exit code: 1
  |
  = note: "avr-gcc" "-Os" "-mmcu=atmega328p" "-L" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/blink-facf8a50db6ed10f.0.o" "-o" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/blink-facf8a50db6ed10f.elf" "-Wl,--gc-sections" "-L" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps" "-L" "/home/niklas/src/avr-rust/blink/target/release/deps" "-L" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib" "-Wl,-Bstatic" "/home/niklas/src/avr-rust/blink/target/avr-atmega328p/release/deps/libarduino-067d1a06a38a989a.rlib" "/home/niklas/.xargo/lib/rustlib/avr-atmega328p/lib/libcore-bb715acab4a13477.rlib" "-Wl,-Bdynamic" "-Wl,--gc-sections"
  = note: /usr/lib/gcc/avr/4.9.2/../../../avr/bin/ld: cannot find crtatmega328p.o: No such file or directory
          /usr/lib/gcc/avr/4.9.2/../../../avr/bin/ld: cannot find -lm
          /usr/lib/gcc/avr/4.9.2/../../../avr/bin/ld: cannot find -lc
          /usr/lib/gcc/avr/4.9.2/../../../avr/bin/ld: cannot find -latmega328p
          collect2: error: ld returned 1 exit status
          

error: aborting due to previous error

error: Could not compile `blink`.

To learn more, run the command again with --verbose.

Undeclared dependency on avr-libc:

% sudo apt install avr-libc

Now it works:

% rustup run avr-toolchain xargo build --target avr-atmega328p --release
   Compiling blink v0.1.0 (file:///home/niklas/src/avr-rust/blink)

Summary

• Just create the bin directory it wants
• sudo apt-get install gcc-avr avr-libc

The second should be added to the docs; what's necessary to have the first be unnecessary?

[stappersg]

@nh2 consider to close this issue, it dates from before the merge into upstream Rust as of July 2020.

@Others that can close this issue: Please do.

[nh2]

OK!