-# The Qt website provides binaries for Windows and MacOSX, and they are
-# automatically found by cmake without any manual intervention. The situation
-# for QJSON is substantially different: there are no binaries for QJSON
-# available, and there is no standard installation directory that is detected
-# by cmake.
-#
-# By bundling the QJSON source, we make it much more easier to build the GUI on
-# Windows and MacOSX. But we only use the bundled sources when ENABLE_GUI is
-# AUTO.
-if (QT4_FOUND AND NOT QJSON_FOUND AND (ENABLE_GUI STREQUAL "AUTO"))
+# Always use bundled QJSon.
+# - The packaged versions QJson are very old, and do not support NaN/Infinity.
+# - To make it easier to build the GUI on Windows and MacOSX, as there are no
+# binaries at all.
+if (QT4_FOUND)
+ add_definitions (-DQJSON_EXPORT=)