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authorWolfgang Denk <wd@denx.de>2008-12-09 00:39:08 +0100
committerWolfgang Denk <wd@denx.de>2008-12-09 00:39:08 +0100
commit7fa6a2f3b66579dea8bc1a9177646e1141731b15 (patch)
treea67cd9d341773b783d29f9629c1768c44413cced /MAKEALL
parent268405fa7c44156c5192a70779920c70906af8d6 (diff)
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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 <wd@denx.de>
Diffstat (limited to 'MAKEALL')
-rwxr-xr-xMAKEALL11
1 files changed, 10 insertions, 1 deletions
diff --git a/MAKEALL b/MAKEALL
index dbed268..a16549c 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}"