If you are compiling an application using the Release 7.1 version of libc and the UDK, and want your application to also run on Release 7.0.0 or Release 7.0.1, then you may need to include the following in your cc(1) command line:
If you do not, then applications built with the Release 7.1 version of libc may not run on Release 7.0.0 or Release 7.0.1. This is because 81 symbols from the archive part of libc (listed in the table below) were moved into the shared part for Release 7.1.
To provide a way for users to create applications that use these symbols and run on all UnixWare 7 releases, an archive library (libcudk70.a), is provided which contains only the following symbols (moved from the archive to the shared part of libc since Release 7.0.0):
New applications compiled without -l cudk70 on Release 7.1 will no longer bind the symbols listed above into their own images and will, instead, expect to find them in the shared part of libc. Since the native versions of the shared part of libc on Release 7.0.0 and Release 7.0.1 do not contain the above symbols, such applications will not run on these systems. To permit Release 7.1 applications to run on prior version of UnixWare 7, include the libcudk70.a library during the linking phase of compiling the application.