From 222848283aa13e2e378223a5514f596c76abac58 Mon Sep 17 00:00:00 2001
From: rekado <rekado@elephly.net>
Date: Fri, 3 Jun 2016 09:06:32 +0200
Subject: Use multiple CPU cores for lilypond.

---
 targets.mk | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'targets.mk')

diff --git a/targets.mk b/targets.mk
index a25d070..17cdc6b 100644
--- a/targets.mk
+++ b/targets.mk
@@ -1,7 +1,12 @@
+# What soundfont to use to generate the MIDI file
 SOUNDFONT = $(HOME)/soundfonts/FluidR3GM.sf2
+# Determine how many processors are present
+CPU_CORES=`grep -m1 "cpu cores" /proc/cpuinfo | tr -cd '[:digit:]'`
+# The command to run lilypond
+LILY_CMD = lilypond -ddelete-intermediate-files -djob-count=$(CPU_CORES)
 
 %.midi: %.ly parts/*.ly
-	lilypond $<
+	$(LILY_CMD) $<
 
 %.wav: %.midi
 	fluidsynth -r 48000 -F $@ -l -R no -i -n -a alsa $(SOUNDFONT) $<
-- 
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