From 7fa6a2f3b66579dea8bc1a9177646e1141731b15 Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Tue, 9 Dec 2008 00:39:08 +0100 Subject: [PATCH] MAKEALL: Automatically use parallel builds Add logic to the MAKEALL script to determine the number of CPU cores on the system, and run a parallel build if there is more than one. Usually this significantrly accelerates builds. Allow to manually adjust the number of parallel make jobs by using the "BUILD_NCPUS" environment variable. Signed-off-by: Wolfgang Denk --- MAKEALL | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/MAKEALL b/MAKEALL index dbed268052..a16549c10d 100755 --- a/MAKEALL +++ b/MAKEALL @@ -1,6 +1,15 @@ #!/bin/sh -: ${JOBS:=} +# Determine number of CPU cores if no default was set +: ${BUILD_NCPUS:="`getconf _NPROCESSORS_ONLN`"} + +if [ "$BUILD_NCPUS" -gt 1 ] +then + JOBS=-j`expr "$BUILD_NCPUS" + 1` +else + JOBS="" +fi + if [ "${CROSS_COMPILE}" ] ; then MAKE="make CROSS_COMPILE=${CROSS_COMPILE}" -- 2.39.5