Perl can be configured at build time to support 64-bit integers - ivsize=8 - even on 32-bit platforms. The Raspberry Pi Perl builds are configured this way but some aren't, causing interpreter errors on the 64-bit mask value 0xffffffffffffffff. Replacing this with a -1 has no negative effect when ivsize=8, and it allows the tool to run when ivsize=4 (without supporting values > 32-bit).
Perl can be configured at build time to support 64-bit integers - ivsize=8 - even on 32-bit platforms. The Raspberry Pi Perl builds are configured this way but some aren't, causing interpreter errors on the 64-bit mask value 0xffffffffffffffff. Replacing this with a -1 has no negative effect when ivsize=8, and it allows the tool to run when ivsize=4 (without supporting values > 32-bit).
See: #23