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MAKEALL: Automatically use parallel builds

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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 <wd@denx.de>
This commit is contained in:
Wolfgang Denk 2008-12-09 00:39:08 +01:00
parent 268405fa7c
commit 7fa6a2f3b6
1 changed files with 10 additions and 1 deletions
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11
MAKEALL
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@ -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}"