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Most important, the mandatory md5 checksum of all the distfiles needed for the package to compile, confirming they match the original file any patches were generated against. This ensures that the distfile retrieved from the Internet has not been corrupted during transfer or altered by a malign force to introduce a security hole. It can be generated by hand using the md5(1) command or by invoking ``make makesum''.
The checksum file for all the official patches for the package, found in the patches/ directory (see patches/*). This checksum file includes an MD5 checksum of all lines in the patch file except the NetBSD RCS Id. This file is generated by invoking ``make makepatchsum''.
Besides that, if you have any files that you wish to be placed in the package prior to configuration or building, you could place these files here and use a ``${CP}'' command in the pre-configure target to achieve this. Alternatively, you could simply diff the file against /dev/null and use the patch mechanism to manage the creation of this file.