gtar-base failure as root

[Greg Troxel <gdt%ir.bbn.com@localhost>]

  checking whether mknod can create fifo without root privileges... configure: 
error: in `/usr/ANONCVS/pkgsrc/archivers/gtar-base/work/tar-1.25':
  configure: error: you should not run configure as root (set 
FORCE_UNSAFE_CONFIGURE=1 in environment to bypass this check)
  See `config.log' for more details.

a) I know standard advice is not to use root but b) pkg_install into the
system has to, and so that's where the trojan would be and c) it ought
to work.

Is this a general issuein new autoconf, or a point issue in gtar?

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