Set cmake env variable

[whatheway (will)]

I think this is what you are asking for…

cmake -DJPEG_LIBRARY=${JPEG_LIBRARY} -DJPEG_INCLUDE_DIR=${JPEG_INCLUDE_DIR} -DJASPER_LIBRARIES=${JASPER_LIBRARIES} -DJASPER_INCLUDE_DIR=${JASPER_INCLUDE_DIR} -DCMAKE_INSTALL_PREFIX=${INSTALL_PREFIX} ..