Build error

[tims23]

When building without gmp installed I get the following error:

[vahempio]

Hi @tims23,
I observed the same issue, then here is the full method that I used to have a correct build (from fresh Debian/Ubuntu install, or docker environment for instance):
[spoiler: I am not a Rust expert]

Install Rust

curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
. "$HOME/.cargo/env"

At this point, the command 'cargo --version' returns 'cargo 1.84.1 (66221abde 2024-11-19)'

Use a Github fork (please read: #222)

git clone https://github.com/irnb/multi-party-ecdsa.git && cd multi-party-ecdsa/

Apply this diff:

diff --git a/Cargo.toml b/Cargo.toml
index 7b04624..cd10e0c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,6 +40,7 @@ round-based = { version = "0.1.4", features = [] }
 thiserror = "1.0.23"
 derivative = "2"
 sha2 = "0.9"
+rug = "1.27"

 [dependencies.paillier]
 version = "0.4.2"

Prepare your Linux

sudo apt install build-essential pkg-config libssl-dev m4

Build

cargo build --release --examples

Examples are in target/release/examples/ and the gg20 is working.
Enjoy!