From ba024fcfc07a52d65c5663b82f36672106f1bbec Mon Sep 17 00:00:00 2001
From: Jerome Robert <jeromerobert@gmx.com>
Date: Mon, 28 Dec 2015 19:28:42 +0100
Subject: [PATCH] Allow to force the number of parallel make job

This is particularly useful when using distcc
---
 Makefile.rule   | 4 ++++
 Makefile.system | 4 ++++
 getarch.c       | 4 +++-
 3 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Makefile.rule b/Makefile.rule
index f7ee09f52..0d7c45ead 100644
--- a/Makefile.rule
+++ b/Makefile.rule
@@ -108,6 +108,10 @@ NO_AFFINITY = 1
 # Don't use parallel make.
 # NO_PARALLEL_MAKE = 1
 
+# Force number of make jobs. The default is the number of logical CPU of the host.
+# This is particularly useful when using distcc
+# MAKE_NB_JOBS = 2
+
 # If you would like to know minute performance report of GotoBLAS.
 # FUNCTION_PROFILE = 1
 
diff --git a/Makefile.system b/Makefile.system
index f1598b910..9de9232ad 100644
--- a/Makefile.system
+++ b/Makefile.system
@@ -139,6 +139,10 @@ NO_PARALLEL_MAKE=0
 endif
 GETARCH_FLAGS	+= -DNO_PARALLEL_MAKE=$(NO_PARALLEL_MAKE)
 
+ifdef MAKE_NB_JOBS
+GETARCH_FLAGS += -DMAKE_NB_JOBS=$(MAKE_NB_JOBS)
+endif
+
 ifeq ($(HOSTCC), loongcc)
 GETARCH_FLAGS  += -static
 endif
diff --git a/getarch.c b/getarch.c
index 024ac4b3d..272b123cd 100644
--- a/getarch.c
+++ b/getarch.c
@@ -998,7 +998,9 @@ int main(int argc, char *argv[]){
 #endif
 #endif
 
-#if NO_PARALLEL_MAKE==1
+#ifdef MAKE_NB_JOBS
+    printf("MAKE += -j %d\n", MAKE_NB_JOBS);
+#elif NO_PARALLEL_MAKE==1
     printf("MAKE += -j 1\n");
 #else
 #ifndef OS_WINDOWS