sputnikvm-network-foundation fails with no_std

[elichai]

Hi,
I used sputnikVM with the sputnikvm-network-classic patch of HomesteadPatch with no_std and it works just fine.
But I tried changing to ByzantiumPatch from sputnikvm_network_foundation, and I got into std problems.
It seems like it comes from the precompiled contracts requirements (bn-plus and num-bigint).

Is there any good solution to this?
Thanks,
Elichai.

[mersinvald]

Problem is in the expmod and bn128 implementations which can't currently be built with std feature disabled.