Description: Patch to be able to use Debian's rapidjson
 This patch adds the CMake-snippet and the necessary changes to be able to
 compile with the pacakged rapidjson.
Author: Tobias Frost <tobi@debian.org>
Forwarded: https://github.com/RobertBeckebans/RBDOOM-3-BFG/pull/351
Last-Update: 2016-10-11
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- a/neo/CMakeLists.txt
+++ b/neo/CMakeLists.txt
@@ -41,6 +41,9 @@
 
 option(USE_SYSTEM_LIBGLEW
                 "Use the system libglew instead of the bundled one" OFF)
+                
+option(USE_SYSTEM_RAPIDJSON
+                "Use the system rapidjson instead of the bundled one" OFF)			
 
 set(CPU_TYPE "" CACHE STRING "When set, passes this string as CPU-ID which will be embedded into the binary.")
 
@@ -273,6 +276,17 @@
     add_definitions(-DGLEW_STATIC)
 endif (GLEW_FOUND)
 
+if(USE_SYSTEM_RAPIDJSON)
+find_package(rapidjson REQUIRED)
+endif(USE_SYSTEM_RAPIDJSON)
+
+if (RAPIDJSON_FOUND)
+	include_directories("${RAPIDJSON_INCLUDE_DIRS}")
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${RAPIDJSON_CXX_FLAGS}")
+else (RAPIDJSON_FOUND)
+	include_directories("libs/rapidjson/include")
+endif (RAPIDJSON_FOUND)
+
 add_subdirectory(idlib)
 
 file(GLOB AAS_INCLUDES aas/*.h)
--- /dev/null
+++ b/neo/cmake/Findrapidjson.cmake
@@ -0,0 +1,97 @@
+# Copyright (c) 2011 Milo Yip (miloyip@gmail.com)
+# Copyright (c) 2013 Rafal Jeczalik (rjeczalik@gmail.com)
+# Distributed under the MIT License (see license.txt file)
+
+# -----------------------------------------------------------------------------------
+#
+# Finds the rapidjson library
+#
+# -----------------------------------------------------------------------------------
+#
+# Variables used by this module, they can change the default behaviour.
+# Those variables need to be either set before calling find_package
+# or exported as environment variables before running CMake:
+#
+# RAPIDJSON_INCLUDEDIR - Set custom include path, useful when rapidjson headers are
+#                        outside system paths
+# RAPIDJSON_USE_SSE2   - Configure rapidjson to take advantage of SSE2 capabilities
+# RAPIDJSON_USE_SSE42  - Configure rapidjson to take advantage of SSE4.2 capabilities
+#
+# -----------------------------------------------------------------------------------
+#
+# Variables defined by this module:
+#
+# RAPIDJSON_FOUND        - True if rapidjson was found
+# RAPIDJSON_INCLUDE_DIRS - Path to rapidjson include directory
+# RAPIDJSON_CXX_FLAGS    - Extra C++ flags required for compilation with rapidjson
+#
+# -----------------------------------------------------------------------------------
+#
+# Example usage:
+#
+#  set(RAPIDJSON_USE_SSE2 ON)
+#  set(RAPIDJSON_INCLUDEDIR "/opt/github.com/rjeczalik/rapidjson/include")
+#
+#  find_package(rapidjson REQUIRED)
+#
+#  include_directories("${RAPIDJSON_INCLUDE_DIRS}")
+#  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${RAPIDJSON_CXX_FLAGS}")
+#  add_executable(foo foo.cc)
+#
+# -----------------------------------------------------------------------------------
+
+foreach(opt RAPIDJSON_INCLUDEDIR RAPIDJSON_USE_SSE2 RAPIDJSON_USE_SSE42)
+  if(${opt} AND DEFINED ENV{${opt}} AND NOT ${opt} STREQUAL "$ENV{${opt}}")
+    message(WARNING "Conflicting ${opt} values: ignoring environment variable and using CMake cache entry.")
+  elseif(DEFINED ENV{${opt}} AND NOT ${opt})
+    set(${opt} "$ENV{${opt}}")
+  endif()
+endforeach()
+
+find_path(
+  RAPIDJSON_INCLUDE_DIRS
+  NAMES rapidjson/rapidjson.h
+  PATHS ${RAPIDJSON_INCLUDEDIR}
+  DOC "Include directory for the rapidjson library."
+)
+
+mark_as_advanced(RAPIDJSON_INCLUDE_DIRS)
+
+if(RAPIDJSON_INCLUDE_DIRS)
+  set(RAPIDJSON_FOUND TRUE)
+endif()
+
+mark_as_advanced(RAPIDJSON_FOUND)
+
+if(RAPIDJSON_USE_SSE42)
+  set(RAPIDJSON_CXX_FLAGS "-DRAPIDJSON_SSE42")
+  if(MSVC)
+    set(RAPIDJSON_CXX_FLAGS "${RAPIDJSON_CXX_FLAGS} /arch:SSE4.2")
+  else()
+    set(RAPIDJSON_CXX_FLAGS "${RAPIDJSON_CXX_FLAGS} -msse4.2")
+  endif()
+else()
+  if(RAPIDJSON_USE_SSE2)
+    set(RAPIDJSON_CXX_FLAGS "-DRAPIDJSON_SSE2")
+    if(MSVC)
+      set(RAPIDJSON_CXX_FLAGS "${RAPIDJSON_CXX_FLAGS} /arch:SSE2")
+    else()
+      set(RAPIDJSON_CXX_FLAGS "${RAPIDJSON_CXX_FLAGS} -msse2")
+    endif()
+  endif()
+endif()
+
+mark_as_advanced(RAPIDJSON_CXX_FLAGS)
+
+if(RAPIDJSON_FOUND)
+  if(NOT rapidjson_FIND_QUIETLY)
+    message(STATUS "Found rapidjson header files in ${RAPIDJSON_INCLUDE_DIRS}")
+    if(DEFINED RAPIDJSON_CXX_FLAGS)
+      message(STATUS "Found rapidjson C++ extra compilation flags: ${RAPIDJSON_CXX_FLAGS}")
+    endif()
+  endif()
+elseif(rapidjson_FIND_REQUIRED)
+    message(FATAL_ERROR "Could not find rapidjson")
+else()
+  message(STATUS "Optional package rapidjson was not found")
+endif()
--- a/neo/idlib/precompiled.h
+++ b/neo/idlib/precompiled.h
@@ -105,7 +105,10 @@
 #include "../ui/UserInterface.h"
 
 // RB: required for SWF extensions
-#include "../libs/rapidjson/include/rapidjson/document.h"
+//#include "../libs/rapidjson/include/rapidjson/document.h"
+#include "rapidjson/document.h"
+
+
 
 #include "../swf/SWF.h"