build/lib/functions/compilation/distcc.sh

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#!/usr/bin/env bash
#
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (c) 2013-2023 Igor Pecovnik, igor@armbian.com
#
# This file is a part of the Armbian Build Framework
# https://github.com/armbian/build/
# Config:
# declare -A -g DISTCC_TARGETS_HOST_PORT=()
# declare -A -g DISTCC_TARGETS_CORES=()
# declare -a -g DISTCC_TARGETS_SPEED_ORDER=()
# Vars:
# declare -a -g DISTCC_CROSS_COMPILE_PREFIX=()
# declare -a -g DISTCC_MAKE_J_PARALLEL=()
function prepare_distcc_compilation_config() {
declare -a DISTCC_TARGETS_SEGMENTS=()
declare -i total_distcc_cores=0
# Loop over DISTCC_TARGETS_SPEED_ORDER, get the details from DISTCC_TARGETS_HOST_PORT, and add the targets to the DISTCC_TARGETS_SEGMENTS array.
for target in "${DISTCC_TARGETS_SPEED_ORDER[@]}"; do
local host_port="${DISTCC_TARGETS_HOST_PORT[$target]}"
declare -i cores="${DISTCC_TARGETS_CORES[$target]}"
# Check if host_port is not empty, otherwise continue.
if [[ -z "$host_port" ]]; then
display_alert "Skipping distcc target" "$target has no host_port defined in config" "wrn"
continue
fi
# Check if $cores is bigger than zero (0), otherwise continue.
if [[ $cores -lt 1 ]]; then
display_alert "Skipping distcc target" "$target has no cores defined in config" "wrn"
continue
fi
total_distcc_cores=$((total_distcc_cores + cores))
DISTCC_TARGETS_SEGMENTS+=("${host_port}/${cores},lzo")
done
# If DISTCC_TARGETS_SEGMENTS is not empty, add the localslots to it.
if [[ ${#DISTCC_TARGETS_SEGMENTS[@]} -gt 0 ]]; then
# Use the total number of distcc cores plus 2
DISTCC_TARGETS_SEGMENTS+=(--localslots=2 --localslots_cpp=$((total_distcc_cores + 2)))
DISTCC_EXTRA_ENVS=(
"HOME=\"${HOME}\"" # Set the HOME, for distcc
"DISTCC_HOSTS=\"${DISTCC_TARGETS_SEGMENTS[*]}\"" # DistCC!
)
DISTCC_CROSS_COMPILE_PREFIX=("distcc")
DISTCC_MAKE_J_PARALLEL=("-j$((total_distcc_cores * 2))") # Use double the total distcc cores
display_alert "DISTCC_TARGETS_SEGMENTS" "${DISTCC_TARGETS_SEGMENTS[*]}" "warn"
else
# If not using distcc, just add "$CTHREADS" to the DISTCC_MAKE_J_PARALLEL array.
[[ -z "${CTHREADS}" ]] && exit_with_error "CTHREADS is not set in prepare_distcc_compilation_config"
DISTCC_MAKE_J_PARALLEL=("${CTHREADS}")
fi
return 0
}