(...src/gnu)> find . -name getopt.c -ls
  21977 Jan  8  2001 ./dist/bc/lib/getopt.c
  21874 Sep  5  2000 ./dist/cvs/lib/getopt.c
  30595 Jan 26 09:43 ./dist/diffutils/lib/getopt.c
  28770 Jun 27  1999 ./dist/gawk/getopt.c
  30123 Oct 31  2000 ./dist/gettext/lib/getopt.c
  30019 Jan 27 08:15 ./dist/grep/lib/getopt.c
  34565 Jul  1 02:52 ./dist/groff/src/libs/libgroff/getopt.c
  34416 Feb 13 17:57 ./dist/texinfo/lib/getopt.c
  30126 Apr 23  2001 ./dist/toolchain/libiberty/getopt.c
  29975 Jul 26  2000 ./dist/toolchain/texinfo/lib/getopt.c
  22198 Jul 26  2000 ./dist/toolchain/texinfo/libtxi/getopt.c
  18047 Feb  4  1998 ./libexec/uucp/libuucp/getopt.c
  21541 Jan 16  2001 ./usr.bin/gzip/getopt.c

(...src/gnu)> foreach i ( `find . -name getopt.c` )
echo $i
diff foreach? echo $i
foreach? diff ~/software/NAMAZU/develop/head/namazu/lib/getopt.c $i | wc
foreach? end
./dist/bc/lib/getopt.c
     549    2478   15428
./dist/cvs/lib/getopt.c
     551    2426   15219
./dist/diffutils/lib/getopt.c
     74     473    2767
./dist/gawk/getopt.c
     384    1673   10850
./dist/gettext/lib/getopt.c
     199     901    5585
./dist/grep/lib/getopt.c
     187     860    5162
./dist/groff/src/libs/libgroff/getopt.c
     331    1215    8034
./dist/texinfo/lib/getopt.c
     374    1499    9654
./dist/toolchain/libiberty/getopt.c
     196     843    5136
./dist/toolchain/texinfo/lib/getopt.c
     302    1285    8024
./dist/toolchain/texinfo/libtxi/getopt.c
     558    2499   15675
./libexec/uucp/libuucp/getopt.c
     837    4039   24530
./usr.bin/gzip/getopt.c
     898    4250   25862
ttyp0:makoto@toyoko  10:04:39/030714(...src/gnu)> 

を見ていて、 kakasi-2.3.4 の getopt.c getopt1.c getopt.h を持って来たら、 何の問題もなく

===================
All 46 tests passed
===================

した。