contrib/docker/riscv.Dockerfile: use emulation instead of crosscompiling

contrib/docker/riscv.Dockerfile

@@ -1,40 +1,33 @@
+# This script uses QEMU emulation, therefore requires the following dependencies:
+# 1. binfmt-support
+# 2. qemu
+# 3. qemu-user-static
+# After installation, register them to docker:
+#   docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
+
 # Usage(on repo root folder):
-#   docker build . --pull --no-cache --shm-size=196m -t darkfi:riscv -f ./contrib/docker/riscv.Dockerfile -o riscv-bins
+#   docker build . --platform=linux/riscv64 --pull --no-cache --shm-size=196m -t darkfi:riscv -f ./contrib/docker/riscv2.Dockerfile -o riscv-bins
 # Optionally, add arguments like: --build-arg BINS=darkirc
 # If you want to keep building using the same builder, remove --no-cache option.
 
 # Arguments configuration
-ARG DEBIAN_VER=latest
-ARG SQL_VER=3420000
-ARG RUST_VER=nightly
+ARG DEBIAN_VER=sid
+ARG RUST_VER=nightly-2024-04-05
 #TODO: only darkirc has been tested, have to check rest binaries to add deps and ports.
 ARG BINS=darkirc
-# When changing riscv target, don't forget to also update the linker
-ARG RISCV_TARGET=riscv64gc-unknown-linux-gnu
-ARG RISCV_LINKER=riscv64-linux-gnu-gcc
 
 # Environment setup
-FROM debian:${DEBIAN_VER} as builder
+FROM --platform=$TARGETPLATFORM riscv64/debian:${DEBIAN_VER} as builder
 
 ## Arguments import
-ARG SQL_VER
 ARG RUST_VER
-ARG RISCV_TARGET
-ARG RISCV_LINKER
 ARG BINS
 
 ## Install system dependencies
 RUN apt-get update
-RUN apt-get install -y make gcc pkg-config gcc-riscv64-linux-gnu wget
-
-## Build sqlite3 for Risc-V
-RUN wget https://www.sqlite.org/2023/sqlite-autoconf-${SQL_VER}.tar.gz && \
-    tar xvfz sqlite-autoconf-${SQL_VER}.tar.gz && \
-    rm sqlite-autoconf-${SQL_VER}.tar.gz && \
-    mv sqlite-autoconf-${SQL_VER} sqlite3 && \
-    cd sqlite3 && \
-    ./configure --host=riscv64-linux-gnu CC=/bin/${RISCV_LINKER} && \
-    make
+RUN apt-get install -y git cmake make gcc g++ pkg-config \
+    libasound2-dev libclang-dev libssl-dev libsqlcipher-dev \
+    libsqlite3-dev wabt wget
 
 ## Rust installation
 RUN wget -O install-rustup.sh https://sh.rustup.rs && \
@@ -42,7 +35,7 @@ RUN wget -O install-rustup.sh https://sh.rustup.rs && \
     rm install-rustup.sh
 ENV PATH "${PATH}:/root/.cargo/bin/"
 RUN rustup default ${RUST_VER}
-RUN rustup target add ${RISCV_TARGET}
+RUN rustup target add wasm32-unknown-unknown --toolchain ${RUST_VER}
 
 # Build binaries
 FROM builder as rust_builder
@@ -50,27 +43,29 @@ FROM builder as rust_builder
 WORKDIR /opt/darkfi
 COPY . /opt/darkfi
 
-# Risc-V support is highly experimental so we have to add some hack patches,
-# at the end of Cargo.toml where [patch.crates-io] exists.
-RUN echo 'ring = {git="https://github.com/aggstam/ring"} \n\
+# Cleanup existing binaries
+RUN rm -rf zkas bin/zkas/zkas darkfid bin/darkfid/darkfid \
+    darkirc bin/darkirc/darkirc lilith bin/lilith/lilith \
+    tau-cli bin/tau/tau-cli/tau-cli taud bin/tau/taud/taud \
+    vanityaddr bin/vanityaddr/vanityaddr
+
+# Risc-V support is highly experimental so we have to add some hack patches
+# at Cargo.toml where [patch.crates-io] exists.
+RUN sed -i Cargo.toml -e '335iring = {git="https://github.com/aggstam/ring"} \n\
 rustls = {git="https://github.com/aggstam/rustls", branch="risc-v"} \n\
-rcgen = {git="https://github.com/aggstam/rcgen"} \n\
-' >> Cargo.toml
-RUN sed -i Cargo.toml -e "s|0.11.3|0.11.1|g"
+rcgen = {git="https://github.com/aggstam/rcgen"} \n'
+
 # Add hacked dependencies into each crate that uses them
 RUN sed -i bin/darkirc/Cargo.toml \
     -e "s|\[dependencies\]|\[dependencies\]\nring = \"0.16.20\"|g"
-RUN cargo update
+RUN cargo +${RUST_VER} update
 
-ENV RUSTFLAGS="-C linker=/bin/${RISCV_LINKER} -L/sqlite3/.libs/"
-ENV TARGET_PRFX="--target=" RUST_TARGET="${RISCV_TARGET}"
-RUN make ${BINS} &&  mkdir compiled-bins && \
+RUN sed -i rust-toolchain.toml -e "s|nightly|${RUST_VER}|g"
+RUN make CARGO="cargo +${RUST_VER}" ${BINS} && \
+    mkdir compiled-bins && \
     (if [ -e zkas ]; then cp -a zkas compiled-bins/; fi;) && \
     (if [ -e darkfid ]; then cp -a darkfid compiled-bins/; fi;) && \
-    (if [ -e faucetd ]; then cp -a faucetd compiled-bins/; fi;) && \
     (if [ -e darkirc ]; then cp -a darkirc compiled-bins/; fi;) && \
-    (if [ -e "genev-cli" ]; then cp -a genev-cli compiled-bins/; fi;) && \
-    (if [ -e genevd ]; then cp -a genevd compiled-bins/; fi;) && \
     (if [ -e lilith ]; then cp -a lilith compiled-bins/; fi;) && \
     (if [ -e "tau-cli" ]; then cp -a tau-cli compiled-bins/; fi;) && \
     (if [ -e taud ]; then cp -a taud compiled-bins/; fi;) && \