From 7005f3b069ead45bf7e5f6eb99c2a4c6a6197508 Mon Sep 17 00:00:00 2001
From: Igor Gnatenko <i.gnatenko.brain@gmail.com>
Date: Mon, 18 May 2015 17:23:28 +0300
Subject: [PATCH] build: allow to use system angelscript

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>
---
 CMakeLists.txt              | 14 ++++++++++----
 cmake/FindAngelscript.cmake | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 43 insertions(+), 4 deletions(-)
 create mode 100644 cmake/FindAngelscript.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2c2f3f5c7..52a06913f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -121,9 +121,15 @@ elseif(MSVC)
 endif()
 
 
-# Build the angelscript library
-add_subdirectory("${PROJECT_SOURCE_DIR}/lib/angelscript/projects/cmake")
-include_directories("${PROJECT_SOURCE_DIR}/lib/angelscript/include")
+# Build the angelscript library if not in system
+find_package(Angelscript)
+if(ANGELSCRIPT_FOUND)
+    include_directories(${Angelscript_INCLUDE_DIRS})
+else()
+    add_subdirectory("${PROJECT_SOURCE_DIR}/lib/angelscript/projects/cmake")
+    include_directories("${PROJECT_SOURCE_DIR}/lib/angelscript/include")
+    set(Angelscript_LIBRARIES angelscript)
+endif()
 
 # OpenAL
 if(APPLE)
@@ -310,7 +316,7 @@ target_link_libraries(supertuxkart
     enet
     glew
     stkirrlicht
-    angelscript
+    ${Angelscript_LIBRARIES}
     ${CURL_LIBRARIES}
     ${OGGVORBIS_LIBRARIES}
     ${OPENAL_LIBRARY}
diff --git a/cmake/FindAngelscript.cmake b/cmake/FindAngelscript.cmake
new file mode 100644
index 000000000..09020c319
--- /dev/null
+++ b/cmake/FindAngelscript.cmake
@@ -0,0 +1,33 @@
+# - Try to find angelscript
+# Once done this will define
+#
+#  ANGELSCRIPT_FOUND - system has angelscript
+#  Angelscript_INCLUDE_DIRS - the angelscript include directory
+#  Angelscript_LIBRARIES - the libraries needed to use angelscript
+#
+
+FIND_PATH(Angelscript_INCLUDE_DIRS angelscript.h
+    PATHS
+    /usr/local
+    /usr
+    PATH_SUFFIXES include
+    )
+
+FIND_LIBRARY(Angelscript_LIBRARY
+    NAMES angelscript
+    PATHS
+    /usr/local
+    /usr
+    PATH_SUFFIXES lib
+    )
+
+# handle the QUIETLY and REQUIRED arguments and set ANGELSCRIPT_FOUND to TRUE if
+# all listed variables are TRUE
+INCLUDE(FindPackageHandleStandardArgs)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(Angelscript DEFAULT_MSG Angelscript_LIBRARY Angelscript_INCLUDE_DIRS)
+
+IF (ANGELSCRIPT_FOUND)
+    SET(Angelscript_LIBRARIES ${Angelscript_LIBRARY})
+ENDIF (ANGELSCRIPT_FOUND)
+
+MARK_AS_ADVANCED(Angelscript_LIBRARY Angelscript_LIBRARIES Angelscript_INCLUDE_DIRS)