From 7acd169bef320b6b6e872b6107383d2047e6a410 Mon Sep 17 00:00:00 2001
From: Will Rosecrans <wrosecran@edgecast.com>
Date: Mon, 8 Jan 2018 14:48:58 -0800
Subject: [PATCH] Tidy build script

---
 build_cmake_pybullet_double.sh | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/build_cmake_pybullet_double.sh b/build_cmake_pybullet_double.sh
index 0bddae1a5..802b87d04 100755
--- a/build_cmake_pybullet_double.sh
+++ b/build_cmake_pybullet_double.sh
@@ -1,10 +1,16 @@
 #!/bin/sh
-rm CMakeCache.txt
-mkdir build_cmake
+
+if [ -e CMakeCache.txt ]; then
+  rm CMakeCache.txt
+fi
+mkdir -p build_cmake
 cd build_cmake
 cmake -DBUILD_PYBULLET=ON -DBUILD_PYBULLET_NUMPY=OFF -DUSE_DOUBLE_PRECISION=ON -DCMAKE_BUILD_TYPE=Release ..
-make -j12
+make -j $(command nproc || echo 12)
 cd examples
 cd pybullet
-ln -s pybullet.dylib pybullet.so
+if [ -e pybullet.dylib ]; then
+  rm pybullet.so
+  ln -s pybullet.dylib pybullet.so
+fi