Can't compile native library since V0.8.0

[bublath]

signal-cli requires the native libzkgroup.so, so to create a distribution for Raspberry (armv7l) I typically do

git clone git@github.com:signalapp/zkgroup.git
cd zkgroup/ffi/java
make

This worked fine with all 0.7.x version, but with every branch starting from 0.8.x I'm getting an error:

....
Compiling cfg-if v1.0.0
thread 'rustc' panicked at 'called Result::unwrap() on an Err value: "Provided allocation has wrong size for slot count 65536"', compiler/rustc_metadata/src/rmeta/decoder.rs:263:29

Any idea how to fix this?

[jrose-signal]

Looks like we might have picked a bad nightly for some architectures! rust-lang/rust#89749 describes the same issue, on this very repository. Leaving this open while I discuss with other Signal folks.

[jrose-signal]

After some discussion we've decided this falls under the general policy that uses outside of Signal's aren't officially supported. Given the timing (signalapp/libsignal#392), I don't think we'll do another zkgroup release just to step past the bad nightly, but you can override it locally if you need to build for a platform that Signal doesn't. (That said, if libsignal-client has the same problem, that's worth fixing going forward.)