environment

#!/bin/bash

if [ "${BASH_SOURCE-}" = "$0" ]; then
    echo -e "This script should be sourced, not run:\nsource $0" >&2
    exit 1
fi

# Exports environment variables needed by parts of this project.

# The following environment variables should already be set to appropriate
# values:
#   RADIANT_DIR (e.g. $HOME/lscc/radiant/2.2/bin/lin64)
#
# If RADIANT_DIR isn't set, then only simulation can be used.

HPS_ROOT=$(dirname $(realpath ${BASH_SOURCE[0]}))

RUSTC="$(which rustc)"
# handle the case where rustc is not yet installed
if [ -z "$RUSTC" ]; then
  echo "rustc not found"
  RUST_DIR=""
else
  RUST_DIR=$(dirname "${RUSTC}")
fi

# Note, LLVM-12 was merged into rust on 2021-03-04. Debian doesn't yet have
# lld-12, so while we're using lld to link, we need to stick to rustc versions
# that use LLVM-11
RUST_VERSION=nightly-2021-03-03

# We completely overwrite any existing PATH. This ensures that we're not getting
# things from unexpected places.
export PATH=/usr/sbin:/usr/bin:/sbin:/bin:$HPS_ROOT/third_party/gn/out:$RUST_DIR

if [ -a "$RADIANT_DIR" ]; then
    export PATH=$PATH:$RADIANT_DIR
fi

# This speeds up recompilation of verilator generated code quit a bit.
export OBJCACHE=ccache
export CC="ccache gcc"

# We deliberately clear anything that may have already been in PYTHONPATH to
# prevent accidentally pulling in anything outside this project.
PYTHONPATH="${HPS_ROOT}/python"
for i in "${HPS_ROOT}/third_party/python"/*; do
    PYTHONPATH="${PYTHONPATH}:${i}"
done
export PYTHONPATH

# Explicitly set the RISCV toolchain path.
export USER_BIN_DIR=$(realpath ~)/bin
export RISCV_DIR=${USER_BIN_DIR}/riscv64-unknown-elf-gcc-8.3.0-2020.04.1-x86_64-linux-ubuntu14/bin
export PATH=${RISCV_DIR}:$PATH