From ab66fa17728b85968dc6b5d590600e56aeed66dd Mon Sep 17 00:00:00 2001
From: Jens Steube <jens.steube@gmail.com>
Date: Sun, 6 Dec 2015 13:09:17 +0100
Subject: [PATCH] Revert "Remove NPROCS from Makefile, make is able to
 automatically detect the optimal number of parallel threads"

Problem here is; This process requires alot of memory. If host memory is too small it will segfault somewhere inside AMD's OpenCL runtime library. Therefore it's better to stick to NPROCS as part of a workaround.

This reverts commit e5adccbf3804d58cb4beb8f06797c0ba179043c6.
---
 src/Makefile | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index 47a396be1..2e0616916 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -4,16 +4,17 @@
 ##
 
 ##
-## Detect host OS
+## Detect number of processors
 ##
 
+NPROCS   := $(shell grep -c ^processor /proc/cpuinfo)
 OS       := $(shell uname)
 
 ##
 ## Makefile flags
 ##
 
-MAKEFLAGS += -l -j -rR --no-print-directory
+MAKEFLAGS += -l -j $(NPROCS) -rR --no-print-directory
 
 ifneq ($(findstring clean,$(MAKECMDGOALS)),)
 MAKEFLAGS += -j 1