From 3d8211696cfee09a9559f64956c82a110678a959 Mon Sep 17 00:00:00 2001
From: Lucas De Marchi <lucas.demarchi@intel.com>
Date: Tue, 27 Oct 2015 17:04:49 -0200
Subject: [PATCH] build: allow -j on top level makefile

By using $(MAKE) variable we allow to pass down to the called makefile
the number of jobs we want to compile with. The flags are communicated
to the next level via MAKEFLAGS variable.

Reference:
https://www.gnu.org/software/make/manual/html_node/Options_002fRecursion.html#Options_002fRecursion
---
 Makefile | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/Makefile b/Makefile
index 133b1fad97..5bdcdd2d2c 100644
--- a/Makefile
+++ b/Makefile
@@ -15,13 +15,13 @@ clean: plane copter rover antennatracker
 .PHONY: plane copter rover antennatracker
 
 plane:
-	make -C ArduPlane $(TARGET)
+	$(MAKE) -C ArduPlane $(TARGET)
 
 copter:
-	make -C ArduCopter $(TARGET)
+	$(MAKE) -C ArduCopter $(TARGET)
 
 rover:
-	make -C APMrover2 $(TARGET)
+	$(MAKE) -C APMrover2 $(TARGET)
 
 antennatracker:
-	make -C AntennaTracker $(TARGET)
+	$(MAKE) -C AntennaTracker $(TARGET)