Note: This version of valgrind does not support some older processors, e.g. AMD K6-III, some (?) Pentium II. If valgrind crashes immediately after it was started with the error message "Illegal hardware instruction", your processor is affected by this problem. As a workaround you can use the devel/valgrind-snapshot port, which is based on a more recent snapshot. Note 2: A sample suppression file might have been installed to \ %%PREFIX%%/etc/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%%/etc/freebsd-default.supp to Valgrind on the commandline, or add that line to your ~/.valgrindrc file, which is the recommended way.