tools.h++ is a C++ foundation class library that was provided in previous releases of Oracle Solaris Studio and Sun Studio software. The library was released in 1996 and has not been significantly updated since. The time and date classes have serious bugs that cannot be fixed.
The functionality in tools.h++ is available with a different programming interface (API) in the C++ Standard Library provided in Oracle Solaris Studio and in the open source BOOST libraries. For information about BOOST libraries see http://www.boost.org.