From 7fa6a2f3b66579dea8bc1a9177646e1141731b15 Mon Sep 17 00:00:00 2001
From: Wolfgang Denk <wd@denx.de>
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 <wd@denx.de>
---
MAKEALL | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/MAKEALL b/MAKEALL
index dbed2680523..a16549c10db 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}"
--
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