+
+ if test -z "$QT4_LIB"; then
+ AC_MSG_ERROR([cannot find qt4 library.])
+ fi
+
+ dnl Check qt version
+ AS_VERSION_COMPARE($QT4_VERSION, $1,
+ [AC_MSG_ERROR([LyX requires at least version $1 of Qt. Only version $QT4_VERSION has been found.])
+ ])
+