Log message:
Make pkgtools/digest cross-compilation ready and actually improve
portability somewhat:
- consistently use POSIX uint{8,16,32,64}_t throughout the code.
- asssume for now that the compiler supports ULL as suffix
- use AC_TYPE_UINT{8,16,32,64}_T instead of bits.c to compute
  possible replacement types.

Bump to 20070703. Tested by Thorsten Glaser on Interix and tnn@ on
Solaris.

Log message:
Override CHECK_PERMS for checkperms and its dependency digest.
This allows making it a real dependency for bulk builds.

Log message:
Sync config.{guess,sub} with mk/gnu-configure.

Log message:
DESTDIR support.

Log message:
Revert libncompat usage and kill the use of snprintf in whirlpool and
tiger instead. Also kill bogus NULL pointer handling in both algorithms:
passing null pointers as buffers (when len != 0) or context is a serious
programming error and should result in a segfault. Bump version to
20060826. OK agc@

Log message:
include libnbcompat on IRIX 5 in order to provide snprintf()

Log message:
USE_DIGEST is no more.

Log message:
Set NO_MTREE since this package will be used during bootstrap and we
don't need to generate the whole directory hierarchy for it.

Log message:
Update the digest package to 20060302.

Apply Tyler Retzlaff's patches from PR 32323 to make this compile with gcc4.

Log message:
Update AC_C___ATTRIBUTE__ macro with newer version on Heimdal,
the old one is just bogus and depends on GCC extensions. Unbreaks
GCC 4 build.