From 52e00acd6d37c1462578d062acd080811964cf86 Mon Sep 17 00:00:00 2001
From: =?utf8?q?=C5=81ukasz=20Stelmach?= <l.stelmach@samsung.com>
Date: Fri, 26 Mar 2021 15:02:18 +0100
Subject: [PATCH] script: Detect number of CPUs
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Automatically determine the number of parallel make(1) processes to run.

Change-Id: I0ce778e5c15ceb8cf80bbfc2f4bb58c937630ba3
Signed-off-by: Łukasz Stelmach <l.stelmach@samsung.com>
---
 build-rpi4.sh | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/build-rpi4.sh b/build-rpi4.sh
index 27eac56c8f89..094988cc381b 100755
--- a/build-rpi4.sh
+++ b/build-rpi4.sh
@@ -1,5 +1,8 @@
 #!/bin/bash
 
+NCPUS=`cat /proc/cpuinfo | grep processor | wc -l`
+NCPUS=$(($NCPUS * 2))
+
 if [ $# != 1 ];
 then
 	echo "Usage : build-rpi3.sh <architecture>"
@@ -27,7 +30,7 @@ if [ $1 = "arm" ]; then
 	if ! [ -e .config ] ; then
 		make ARCH=arm CROSS_COMPILE="$CROSS_COMPILER" tizen_bcm2709_defconfig
 	fi
-	make ARCH=arm CROSS_COMPILE="$CROSS_COMPILER" -j8
+	make ARCH=arm CROSS_COMPILE="$CROSS_COMPILER" -j $NCPUS
 	if [ ! -f "./arch/arm/boot/zImage" ]; then
 		echo "Build fail"
 		exit 1
@@ -42,7 +45,7 @@ elif [ $1 = "arm64" ]; then
 	if ! [ -e .config ] ; then
 		make ARCH=arm64 CROSS_COMPILE="$CROSS_COMPILER" tizen_bcmrpi3_defconfig
 	fi
-	make ARCH=arm64 CROSS_COMPILE="$CROSS_COMPILER" -j8
+	make ARCH=arm64 CROSS_COMPILE="$CROSS_COMPILER" -j $NCPUS
 	if [ ! -f "./arch/arm64/boot/Image" ]; then
 		echo "Build fail"
 		exit 1
-- 
2.34.1