Fails to build for aarch64-unknown-linux-musl

[vi]

error[E0425]: cannot find value `MAP_32BIT` in module `libc`                                                                                          
  --> /home/vi/.cargo/registry/src/github.com-1ecc6299db9ec823/nix-0.11.0/src/sys/mman.rs:53:9                                                        
   |                                                                                                                                                  
53 |         MAP_32BIT;                                                                                                                               
   |         ^^^^^^^^^ not found in `libc`                                                                                                            
                                                                                                                                                      
error: aborting due to previous error                                                                                                                 
                                                                                                                                                      
For more information about this error, try `rustc --explain E0425`.                                                                                   
error: Could not compile `nix`.                                                                                                                       

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

[asomers]

This is probably a bug in libc. You should check aarch64 musl to see if that symbol is actually defined. If so, then submit a PR to libc to fix it. If not, then it's a bug in Nix.

[light4]

I checked the latest musl repo, find that MAP_32BIT does not defined in aarch64.

[vi]

So shall nix-rust workaround and not use it on that platform then?

[asomers]

Nix doesn't do workarounds. Instead, we should simply disable the feature on unsupported platforms.

[dalance]

This issue seems to be fixed at 7f0fb19.
If so, I think this issue should be closed.

[asomers]

Are you sure? The timestamps suggest otherwise.

[dalance]

The original error message shows the nix version is v0.11.0, and the commit is released at v0.12.0.
So I think it is fixed at v0.12.0.

[asomers]

Ahh, good. Have you tested it lately? I don't have that toolchain installed.

[dalance]

No. I don't have the environment too.

[asomers]

Just installed it. Works for me.