Checks that the GTK library in use is compatible with the given version.
Generally you would pass in the constants
GTK_MICRO_VERSION as the three arguments
to this function; that produces a check that the library in
use is compatible with the version of GTK the application or
module was compiled against.
Compatibility is defined by two things: first the version
of the running library is newer than the version
the running library must be binary compatible with the
(same major version.)
This function is primarily for GTK modules; the module
can call this function to check that it wasn’t loaded
into an incompatible version of GTK. However, such a
check isn’t completely reliable, since the module may be
linked against an old version of GTK and calling the
old version of
check_version(), but still get loaded
into an application using a newer version of GTK.
the required major version
the required minor version
the required micro version
None if the GTK library is compatible with the
given version, or a string describing the version mismatch.
The returned string is owned by GTK and should not be modified