Version Information variables and functions to check the GTK+ version. GTK+ provides version information, primarily useful in configure checks for builds that have a configure script. Applications will not typically use the features described here. The major version number of the GTK+ library. (e.g. in GTK+ version 1.2.5 this is 1.) This variable is in the library, so represents the GTK+ library you have linked against. Contrast with the #GTK_MAJOR_VERSION macro, which represents the major version of the GTK+ headers you have included. The minor version number of the GTK+ library. (e.g. in GTK+ version 1.2.5 this is 2.) This variable is in the library, so represents the GTK+ library you have linked against. Contrast with the #GTK_MINOR_VERSION macro, which represents the minor version of the GTK+ headers you have included. The micro version number of the GTK+ library. (e.g. in GTK+ version 1.2.5 this is 5.) This variable is in the library, so represents the GTK+ library you have linked against. Contrast with the #GTK_MICRO_VERSION macro, which represents the micro version of the GTK+ headers you have included. This is the binary age passed to libtool. If libtool means nothing to you, don't worry about it. ;-) This is the interface age passed to libtool. If libtool means nothing to you, don't worry about it. ;-) Checks that the GTK+ library in use is equal to the given version. Primarily useful to compare the header file version (from #GTK_MAJOR_VERSION, #GTK_MINOR_VERSION, #GTK_MICRO_VERSION) the the runtime library version. This should only be done in the build for your application, to check that the user's libraries and header files are the same. Applications should not do this when deployed, because it's OK for applications to use a different micro version of GTK+ than the one they were compiled against. @required_major: the required major version. @required_minor: the required major version. @required_micro: the required major version. @Returns: %NULL if the GTK+ library is compatible with the given version, or a string describing the version mismatch. Like #gtk_major_version, but from the headers used at application compile time, rather than from the library linked against at application run time. Like #gtk_minor_version, but from the headers used at application compile time, rather than from the library linked against at application run time. Like #gtk_micro_version, but from the headers used at application compile time, rather than from the library linked against at application run time. Like #gtk_binary_age, but from the headers used at application compile time, rather than from the library linked against at application run time. Like #gtk_interface_age, but from the headers used at application compile time, rather than from the library linked against at application run time. Returns %TRUE if the version of the GTK+ header files is the same as the passed-in version. @major: major version (e.g. 1 for version 1.2.5) @minor: minor version (e.g. 2 for version 1.2.5) @micro: micro version (e.g. 5 for version 1.2.5)