HP-UX 11i Version 1.5 Release Notes, September 2001

Programming
libcres.a Library
Chapter 7102
libcres.a Library
The libcres.a library is an archive of functions (select functions from
libc) that are leaf functions that do not use shared data. The intent of
this library is to provide performance critical applications with the
ability to call certain performance critical functions more efficiently than
would be possible if those functions were in a shared library. This library
is useful because, from the HP-UX 11i Version 1.5 (B.11.20) release
onwards, libc is no longer available in archive form.
The libcres usage model has changed significantly, it does not need to be
linked with the application explicitly. The libcres.a linkage is handled
automatically by the tool chain.
The functions in libcres.a may change in future releases.
libcres.a Documentation
For more information, see the libcres.a (5) manual page.