1. Mesa/XFree86 off-screen rendering library (unstripped) This package is useful to provide a backtrace with symbol names in a debugger; this facilitates interpretation of core dumps, and aids in finding logic errors in programs using this library (or the library itself). The library is installed in /usr/lib/debug and can be used by placing that directory in the LD_LIBRARY_PATH environment variable when the code to be debugged is executed. Non-programmers will likely have little use for this package. See the xlibosmesa3 package for further information. From Debian 3.0r0 APT