File use-system-libs.patch of Package libbullet

From: Max Mitschke <max.mitschke@msufcu.org>
Date: 2019-05-22 22:10:34 -0400
References: 
Upstream: never
Subject: Use system-provided tinyxml2 library instead of bundled library
---

diff -Naur a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2018-12-31 15:42:41.000000000 -0500
+++ b/CMakeLists.txt	2019-05-22 21:00:13.301474451 -0400
@@ -328,6 +328,8 @@
 OPTION(BUILD_ENET "Set when you want to build apps with enet UDP networking support" ON)
 OPTION(BUILD_CLSOCKET "Set when you want to build apps with enet TCP networking support" ON)
 
+include(FindPkgConfig)
+pkg_check_modules(tinyxml2 REQUIRED tinyxml2)
 
 IF(BUILD_PYBULLET)
 	FIND_PACKAGE(PythonLibs)
diff -Naur a/Extras/Serialize/BulletXmlWorldImporter/CMakeLists.txt b/Extras/Serialize/BulletXmlWorldImporter/CMakeLists.txt
--- a/Extras/Serialize/BulletXmlWorldImporter/CMakeLists.txt	2018-12-31 15:42:41.000000000 -0500
+++ b/Extras/Serialize/BulletXmlWorldImporter/CMakeLists.txt	2019-05-22 21:14:35.432401242 -0400
@@ -1,8 +1,8 @@
 INCLUDE_DIRECTORIES(
+	${tinyxml2_INCLUDE_DIRS}
 	${BULLET_PHYSICS_SOURCE_DIR}/src
 	${BULLET_PHYSICS_SOURCE_DIR}/Extras/Serialize/BulletFileLoader
 	${BULLET_PHYSICS_SOURCE_DIR}/Extras/Serialize/BulletWorldImporter
-	${BULLET_PHYSICS_SOURCE_DIR}/examples/ThirdPartyLibs/tinyxml2
 )
 
 ADD_LIBRARY(
@@ -11,14 +11,13 @@
 	btBulletXmlWorldImporter.h
 	string_split.cpp
 	string_split.h
-	${BULLET_PHYSICS_SOURCE_DIR}/examples/ThirdPartyLibs/tinyxml2/tinyxml2.cpp
 )
 
 SET_TARGET_PROPERTIES(BulletXmlWorldImporter  PROPERTIES VERSION ${BULLET_VERSION})
 SET_TARGET_PROPERTIES(BulletXmlWorldImporter PROPERTIES SOVERSION ${BULLET_VERSION})
 
 IF (BUILD_SHARED_LIBS)
-	TARGET_LINK_LIBRARIES(BulletXmlWorldImporter BulletWorldImporter BulletDynamics BulletCollision BulletFileLoader LinearMath)
+	TARGET_LINK_LIBRARIES(BulletXmlWorldImporter BulletWorldImporter BulletDynamics BulletCollision BulletFileLoader LinearMath ${tinyxml2_LIBRARIES})
 ENDIF (BUILD_SHARED_LIBS)
 
 IF (INSTALL_EXTRA_LIBS)