set(USE_SYSTEM_BJam ON CACHE BOOL "Use system version of BJam")
set(USE_SYSTEM_Boost ON CACHE BOOL "Use system version of Boost")
set(USE_SYSTEM_Expat ON CACHE BOOL "Use system version of Expat")
set(USE_SYSTEM_Freetype ON CACHE BOOL "Use system version of Freetype")
set(USE_SYSTEM_GLEW ON CACHE BOOL "Use system version of GLEW")
set(USE_SYSTEM_LXML ON CACHE BOOL "Use system version of LXML")
set(USE_SYSTEM_OpenSSL ON CACHE BOOL "Use system version of OpenSSL")
set(USE_SYSTEM_PCRE ON CACHE BOOL "Use system version of PCRE")
set(USE_SYSTEM_PIL ON CACHE BOOL "Use system version of PIL")
set(USE_SYSTEM_Python ON CACHE BOOL "Use system version of Python")
set(USE_SYSTEM_QGLViewer ON CACHE BOOL "Use system version of QGLViewer")
set(USE_SYSTEM_Qt ON CACHE BOOL "Use system version of Qt")
set(USE_SYSTEM_RDFLib ON CACHE BOOL "Use system version of RDFLib")
set(USE_SYSTEM_SUDS ON CACHE BOOL "Use system version of SUDS")
set(USE_SYSTEM_Setuptools ON CACHE BOOL "Use system version of Setuptools")
set(USE_SYSTEM_Zlib ON CACHE BOOL "Use system version of Zlib")
set(USE_SYSTEM_QJson ON CACHE BOOL "Use system version of QJson")
set(USE_SYSTEM_CSSSelect ON CACHE BOOL "Use system version of CSSSelect")
set(USE_SYSTEM_GraphicsMagick ON CACHE BOOL "Use system version of GraphicsMagick")
set(USE_SYSTEM_Jpeg ON CACHE BOOL "Use system version of Jpeg")
set(USE_SYSTEM_APIExtractor ON CACHE BOOL "Use system version of APIExtractor")
set(USE_SYSTEM_FontConfig ON CACHE BOOL "Use system version of FontConfig")
set(USE_SYSTEM_GOCR ON CACHE BOOL "Use system version of GOCR")
set(USE_SYSTEM_GeneratorRunner ON CACHE BOOL "Use system version of GeneratorRunner")
set(USE_SYSTEM_OSRA ON CACHE BOOL "Use system version of OSRA")
set(USE_SYSTEM_Ocrad ON CACHE BOOL "Use system version of Ocrad")
set(USE_SYSTEM_OpenBabel ON CACHE BOOL "Use system version of OpenBabel")
set(USE_SYSTEM_Pillow ON CACHE BOOL "Use system version of Pillow")
set(USE_SYSTEM_Poppler ON CACHE BOOL "Use system version of Poppler")
set(USE_SYSTEM_Potrace ON CACHE BOOL "Use system version of Potrace")
set(USE_SYSTEM_PySide ON CACHE BOOL "Use system version of PySide")
set(USE_SYSTEM_Shiboken ON CACHE BOOL "Use system version of Shiboken")
set(USE_SYSTEM_TCLAP ON CACHE BOOL "Use system version of TCLAP")
