add qxmpp as external project

CMakeLists.txt

@@ -138,6 +138,7 @@ if (WIN32)
 endif ()
 
 option(GET_SDL2 "Get SDL2 library automatically as external project" 0)
+option(GET_QXMPP "GET Qxmpp library automatically as external project" 0)
 
 if (WIN32)
   add_paths_to_lib_paths("${QT_DIR}/bin")

cmake/externals/qxmpp/CMakeLists.txt

@@ -0,0 +1,47 @@
+set(EXTERNAL_NAME qxmpp)
+
+# we need to find qmake inside QT_DIR
+find_program(QMAKE_COMMAND NAME qmake PATHS ${QT_DIR}/bin NO_DEFAULT_PATH)
+
+if (NOT QMAKE_COMMAND)
+  message(FATAL_ERROR "Could not find qmake. Qxmpp cannot be compiled without qmake.")
+endif ()
+
+if (ANDROID)
+  set(ANDROID_CMAKE_ARGS "-DCMAKE_TOOLCHAIN_FILE=${CMAKE_TOOLCHAIN_FILE}" "-DANDROID_NATIVE_API_LEVEL=19")
+endif ()
+
+include(ExternalProject)
+ExternalProject_Add(
+  ${EXTERNAL_NAME}
+  URL http://qxmpp.googlecode.com/files/qxmpp-0.7.6.tar.gz
+  URL_MD5 ee45a97313306ded2ff0f6618a3ed1e1
+  BUILD_IN_SOURCE 1
+  PATCH_COMMAND patch -p2 -t -N --verbose < ${CMAKE_CURRENT_SOURCE_DIR}/qxmpp.patch
+  CONFIGURE_COMMAND ${QMAKE_COMMAND} PREFIX=<INSTALL_DIR>
+  LOG_DOWNLOAD 1
+  LOG_CONFIGURE 1
+  LOG_BUILD 1
+)
+
+ExternalProject_Get_Property(${EXTERNAL_NAME} INSTALL_DIR)
+
+string(TOUPPER ${EXTERNAL_NAME} EXTERNAL_NAME_UPPER)
+set(${EXTERNAL_NAME_UPPER}_INCLUDE_DIRS ${INSTALL_DIR}/include CACHE FILEPATH "Path to Qxmpp include directory")
+
+if (WIN32)
+  set(_LIB_EXT "lib")
+  
+  set(${EXTERNAL_NAME_UPPER}_DLL_PATH ${_LIB_DIR} CACHE PATH "Location of QXmpp DLL")
+else ()
+  if (APPLE)
+    set(_LIB_EXT "dylib")
+  else ()
+    set(_LIB_EXT "so")
+  endif ()
+  
+  set(_LIB_PREFIX "lib")
+endif ()
+
+set(${EXTERNAL_NAME_UPPER}_LIBRARY_RELEASE ${INSTALL_DIR}/${_LIB_PREFIX}qxmpp.${_LIB_EXT} CACHE FILEPATH "Path to QXmpp release library")
+set(${EXTERNAL_NAME_UPPER}_LIBRARY_DEBUG NOTFOUND CACHE FILEPATH "Path to QXmpp debug library")

cmake/externals/qxmpp/qxmpp.patch

@@ -0,0 +1,13 @@
+diff --git a/qxmpp-0.7.6/src/src.pro b/qxmpp-0.7.6-patch/src/src.pro
+index 954738c..8404c8c 100644
+--- a/qxmpp-0.7.6/src/src.pro
++++ b/qxmpp-0.7.6-patch/src/src.pro
+@@ -4,7 +4,7 @@ QT -= gui
+ 
+ TEMPLATE = lib
+ 
+-CONFIG += $$QXMPP_LIBRARY_TYPE
++CONFIG += $$QXMPP_LIBRARY_TYPE c++11
+ DEFINES += QXMPP_BUILD
+ DEFINES += $$QXMPP_INTERNAL_DEFINES
+ INCLUDEPATH += $$QXMPP_INCLUDEPATH $$QXMPP_INTERNAL_INCLUDES

interface/CMakeLists.txt

@@ -119,7 +119,7 @@ link_hifi_libraries(shared octree environment gpu model fbx metavoxels networkin
                     audio audio-client animation script-engine physics 
                     render-utils entities-renderer)
 
-add_dependency_external_projects(sdl2)
+add_dependency_external_projects(sdl2 qxmpp)
 
 # perform standard include and linking for found externals
 foreach(EXTERNAL ${OPTIONAL_EXTERNALS})