s390x support for blstrs

[vishwabmc]

Hello,

On the below environment, we are building libfilcrypto.so from filecoin-ffi/rust/

Platform : s390x
Endianness : Big
OS : Ubuntu 20.04

But ran into this below issue

src/lib.rs

#[cfg(not(target_endian = "little"))]
compile_error!("blstrs is only supported on little endian architectures");

Would you have plans on supporting blstrs on s390x platform for Big Endian architecture ?

Thank you,

[dignifiedquire]

Not at the moment, sorry. There are some core assumption about endianess in the code atm, which will be very hard to work around. I also don't think blst iteself is guranteed to work on big endian architectures atm. I would recommend using https://github.com/zkcrypto/bls12_381 on those platforms, it adheres to the same api and is a pure rust implementation.

[dot-asm]

I also don't think blst itself is guaranteed to work on big endian architectures atm.

blst does work on big-endian platforms, the limitation is blstrs's.

[dignifiedquire]

blst does work on big-endian platforms, the limitation is blstrs's.

Thanks, I guess needs to be tested and checked the on this side.