NAME

       XkbLibraryVersion -  Determines the compatibility of a library at runtime.

SYNOPSIS

       Bool XkbLibraryVersion (int *lib_major_in_out, int *lib_minor_in_out);

ARGUMENTS

       lib_major_in_out
              Specifies and returns the major Xkb library version.

       lib_minor_in_out
              Specifies and returns the minor Xkb library version.

DESCRIPTION

       If  an  application is dynamically linked, both the X server and the client-side X library
       must contain the Xkb  extension  in  order  for  the  client  to  use  the  Xkb  extension
       capabilities.  Therefore  a dynamically linked application must check both the library and
       the server for compatibility before using Xkb function calls. A properly  written  program
       must  check  for  compatibility between the version of the Xkb library that is dynamically
       loaded and the one used when the application was built. It  must  then  check  the  server
       version for compatibility with the version of Xkb in the library.

       If  your  application  is statically linked, you must still check for server compatibility
       and may check library compatibility. (It is possible to compile against one set of  header
       files  and  link  against a different, incompatible, version of the library, although this
       should not normally occur.)

       Pass the  symbolic  value  XkbMajorVersion  in  lib_major_in_out  and  XkbMinorVersion  in
       lib_minor_in_out.   These  arguments  represent the version of the library used at compile
       time. The XkbLibraryVersion function backfills the major and minor version numbers of  the
       library used at run time in lib_major_in_out and lib_minor_in_out.  If the versions of the
       compile time and run  time  libraries  are  compatible,  XkbLibraryVersion  returns  True,
       otherwise, it returns False.

       In  addition,  in  order  to  use the Xkb extension, you must ensure that the extension is
       present in the server and that the server supports the version of the  extension  expected
       by the client. Use XkbQueryExtension to do this, as described in the next section.

RETURN VALUES

       True           The  XkbLibraryVersion returns True if the versions of the compile time and
                      run time libraries are compatible.

       False          The XkbLibraryVersion returns False if the versions of the compile time and
                      run time libraries are not compatible.

SEE ALSO

       XkbMajorVersion(3), XkbMinorVersion(3), XkbQueryExtension(3)