From d87452ed219676432704d91cabaa2abf437de5cb Mon Sep 17 00:00:00 2001
From: Gregory Hainaut <gregory.hainaut@gmail.com>
Date: Thu, 18 Aug 2016 22:45:46 +0200
Subject: [PATCH] build.sh: allow to replace make by ninja to speed up the
 build system

Quick benchmark. GCC debug mode
Full build: 6 second better, it can 2 additional cores :)
make : ./build.sh --dbg --clean  213.25s user 22.35s system 881% cpu 26.739 total
ninja: ./build.sh --dbg --clean  203.94s user 18.31s system 1085% cpu 20.474 total

No change build:: 1 second better :)
 make -C build_dbg -j 16 install  1.51s user 0.34s system 206% cpu 0.898 total
ninja -C build_dbg -j 16 install  0.05s user 0.02s system 98% cpu 0.074 total
---
 build.sh | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/build.sh b/build.sh
index 1a3a70f61a..8f5a001da4 100755
--- a/build.sh
+++ b/build.sh
@@ -33,6 +33,10 @@ build="$root/build"
 coverity_dir="cov-int"
 coverity_result=pcsx2-coverity.xz
 
+if [ -x `which ninja` ]; then
+    flags="$flags -GNinja"
+fi
+
 if [ `uname -s` = 'Darwin' ]; then
     ncpu=`sysctl -n hw.ncpu`
     release=$(uname -r)
@@ -241,7 +245,12 @@ fi
 ############################################################
 # Real build
 ############################################################
-make -j"$ncpu" 2>&1 | tee -a "$log"
-make install 2>&1 | tee -a "$log"
+if [ -x `which ninja` ]; then
+    ninja 2>&1 | tee -a "$log"
+    ninja install 2>&1 | tee -a "$log"
+else
+    make -j"$ncpu" 2>&1 | tee -a "$log"
+    make install 2>&1 | tee -a "$log"
+fi
 
 exit 0