[tac_plus] make install error

[brain conflict]

Hello,
    On Ubuntu 8.04, I'm getting the following when doing a "make
install" for tac_plus. Just checking to see if you know what this is
off the top of your head. Trying an older version now....   Thanks!

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/bin/bash ./libtool  --tag=CC   --mode=compile gcc -DHAVE_CONFIG_H -I.
  -I/usr/local/include -g -O2 -pthread    -g -O2 -pthread    -MT
libtacacs_la-fdes.lo -MD -MP -MF .deps/libtacacs_la-fdes.Tpo -c -o
libtacacs_la-fdes.lo `test -f 'fdes.c' || echo './'`fdes.c
libtool: compile:  gcc -DHAVE_CONFIG_H -I. -I/usr/local/include -g -O2
-pthread -g -O2 -pthread -MT libtacacs_la-fdes.lo -MD -MP -MF
.deps/libtacacs_la-fdes.Tpo -c fdes.c  -fPIC -DPIC -o
.libs/libtacacs_la-fdes.o
In file included from config.h:330,
                 from fdes.c:25:
/usr/include/unistd.h:275: error: two or more data types in
declaration specifiers
make: *** [libtacacs_la-fdes.lo] Error 1

=========================

Brian