Note : A sample suppression file was installed to \ %%PREFIX%%/lib/valgrind/freebsd-default.supp. It makes Valgrind hide warnings caused by flawed code sequences -if any - in your system libraries, so that you can concentrate on the warnings issued for your own code. To use these suppressions, either pass --suppressions=%%PREFIX%%/lib/valgrind/freebsd-default.supp to Valgrind on the commandline, or add that line to your ~/.valgrindrc file, which is the recommended way.