From ca0ee60ed3313935743eb3fd92401cc26061d75b Mon Sep 17 00:00:00 2001
From: Alex Zolotarev <deathbaba@gmail.com>
Date: Sun, 11 Nov 2012 01:17:28 +0100
Subject: [PATCH] [build] Autodetect number of cores in build script

---
 tools/autobuild/build.sh | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/tools/autobuild/build.sh b/tools/autobuild/build.sh
index 668e8867d6..438f739a3f 100644
--- a/tools/autobuild/build.sh
+++ b/tools/autobuild/build.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 set -e -x
 
 LOCAL_DIRNAME="$(dirname "$0")"
@@ -5,6 +6,20 @@ LOCAL_DIRNAME="$(dirname "$0")"
 
 source "$LOCAL_DIRNAME/detect_qmake.sh"
 
+# Prints number of cores to stdout
+GetCPUCores() {
+  case "$OSTYPE" in
+    linux-gnu) grep -c ^processor /proc/cpuinfo 2>/dev/null
+               ;;
+    darwin) sysctl -n hw.ncpu
+               ;;
+    *)         echo "Unsupported platform in $0"
+               exit 1
+               ;;
+  esac
+  return 0
+}
+
 # 1st param: shadow directory path
 # 2nd param: mkspec
 # 3rd param: additional qmake parameters
@@ -20,6 +35,6 @@ BuildQt() {
     cd "$SHADOW_DIR"
     qmake -r "$QMAKE_PARAMS" -spec "$MKSPEC" "$LOCAL_DIRNAME/../../omim.pro"
 #    make clean > /dev/null || true
-    make -j 2
+    make -j $(GetCPUCores)
   )
 }