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370bedb42d
* Add option for number of threads used by build system Attempt to fix https://github.com/armbian/build/issues/6907 * Add CPUTHREADS to replace USEALLTHREADS Defaults to 150% as was always the case, otherwise allow user to override number of threads.
48 lines
1.8 KiB
Bash
48 lines
1.8 KiB
Bash
#!/usr/bin/env bash
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#
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# SPDX-License-Identifier: GPL-2.0
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#
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# Copyright (c) 2013-2023 Igor Pecovnik, igor@armbian.com
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#
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# This file is a part of the Armbian Build Framework
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# https://github.com/armbian/build/
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function prepare_compilation_vars() {
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# moved from config: rpardini: ccache belongs in compilation, not config. I think.
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if [[ $USE_CCACHE == yes || ${PRIVATE_CCACHE} == yes ]]; then
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display_alert "using CCACHE" "USE_CCACHE or PRIVATE_CCACHE is set to yes" "warn"
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CCACHE=ccache
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export PATH="/usr/lib/ccache:$PATH" # this actually needs export'ing
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# private ccache directory to avoid permission issues when using build script with "sudo"
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# see https://ccache.samba.org/manual.html#_sharing_a_cache for alternative solution
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[[ $PRIVATE_CCACHE == yes ]] && export CCACHE_DIR=$SRC/cache/ccache # actual export
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else
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CCACHE=""
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fi
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# moved from config: this does not belong in configuration. it's a compilation thing.
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# optimize build time with 100% CPU usage
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CPUS=$(grep -c 'processor' /proc/cpuinfo)
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# Default to 150% of CPUs to maximize compilation speed
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CTHREADS="-j$((CPUS + CPUS / 2))"
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# If CPUTHREADS is defined and a valid positive integer allow user to override CTHREADS
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# This is useful for limiting Armbian build to a specific number of threads, e.g. for build servers
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if [[ "$CPUTHREADS" =~ ^[1-9][0-9]*$ ]]; then
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CTHREADS="-j$CPUTHREADS"
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echo "Using user-defined thread count: $CTHREADS"
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fi
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call_extension_method "post_determine_cthreads" "config_post_determine_cthreads" <<- 'POST_DETERMINE_CTHREADS'
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*give config a chance modify CTHREADS programatically. A build server may work better with hyperthreads-1 for example.*
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Called early, before any compilation work starts.
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POST_DETERMINE_CTHREADS
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# readonly, global
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declare -g -r CTHREADS="${CTHREADS}"
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return 0
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}
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