Linking with `gcc` fails on Windows

[suhr]

The following code fails to link on both stable-gnu and nightly-gnu toolchains:

extern crate hound;

fn main() {
    let mut input = hound::WavReader::open("clarinet-d4.wav").unwrap();

    println!("Hello, world!");
}

The build fails with the following output: https://gist.github.com/suhr/2962444f16cfce13bdc7118fe658a33c. Note that hound is a pure Rust crate.

Strangely enough, a hello world without hound compiles just fine.

OS: Windows 7, toolchain: stable-gnu and nightly-gnu.

[rkarp]

This seems to be specific to your installation, it works fine for me (also Windows 7).

It's weird that none of the files to be linked can be found, maybe gcc / ld doesn't like the cyrillic characters in the path? Although in that case you would expect the linking to never work.

[suhr]

I did some experiments and found something very strange: if you put the same code in C:\раст\msfz instead of C:\Users\Администратор\Общее\msfz, it compiles just fine! But in C:\Users\Администратор\Общее\msfz build still fails.

[retep998]

I wonder if it is related to making the linker command line long enough that it triggers the condition to pass in the linker command line by file. If so, it might be getting the encoding wrong.

cc @alexcrichton

[suhr]

Indeed, I can reproduce this with C:\Users\Ааааббббввввгд\msfz, but not with C:\Users\Руст\msfz.

[retep998]

Ideal workaround: Use the pc-windows-msvc toolchain.

Alternative workaround: Disable incremental compilation and set codegen units to 1, thereby shortening the linker command line length.

Ideal solution: Figure out how to encode the linker command file such that MinGW interprets it as unicode.

Temporary hack: Disable using linker command lines with the gnu linker when on Windows.

[alexcrichton]

@suhr hm what version of gcc are you using? I'm unable to reproduce this locally, but maybe this got fixed in newer versions of gcc?

[suhr]

Both toolchains seem to use gcc 6.3.0.

[alexcrichton]

Ah ok, I've got 7.2.0 in my environment, mind giving that a spin and see if it works?

[suhr]

How to update it on Windows?

[alexcrichton]

Oh I personally use pacman locally but I think you can also download manually from the old sourceforge site

[suhr]

Well, this sounds somewhat complicated.

[alexcrichton]

@suhr ok I tested locally and 6.3.0 works for me as well. What's the output if you execute gcc --version --verbose for you?