五十嵐です。

| | わたなべです。
| |
| | 五十嵐さんはうまくいかないとしか書いてないから、
| | 何が問題かわかりません。
| | どういうエラーが起きているかもう少し詳しく書いてください。
| |
| | それと結局のところ、mingw32版、cygwin版のどちらのrubyを作り
| | たいんでしょう?

見当違いの返事を書きまして申し訳有りません。

Cygwin は cygwinversion: 1.3.2-1

minngw32 について。(gcc-2.95.3 を使っております)
 ./configure --enable-shared
これはビルドに失敗。configure log のsummaryは以下のようです。
checking host system type... i586-pc-cygwin
checking target system type... i586-pc-cygwin
checking build system type... i586-pc-cygwin
checking for gcc... gcc
checking whether the C compiler (gcc  ) works... yes
checking whether the C compiler (gcc  ) is a cross-compiler... no

make 時のエラーは
gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c array.c
gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c bignum.c
gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c class.c
gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c compar.c
gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c dir.c
dir.c: In function `dir_s_mkdir':
dir.c:475: too many arguments to function `mkdir'
make: *** [dir.o] Error 1

./configure --enable-shared i586-mingw32  とした時、これはビルドに成功。
checking host system type... i586-pc-mingw32
checking target system type... i586-pc-mingw32
checking build system type... i586-pc-mingw32
checking for gcc... gcc
checking whether the C compiler (gcc  ) works... yes
checking whether the C compiler (gcc  ) is a cross-compiler... no
checking whether we are using GNU C... yes

make 時の上記との差は、
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c array.c
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c bignum.c
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c class.c
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c compar.c
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c dir.c
gcc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"mi
ngw32-ruby16.dll\" -c dln.c

エラーの時の違いは、flag  の -DNT -D__MSVCRT__  に
あるようでした。

cygwin gcc under Cygwin
./configure --enable-shared
この時の make 時のエラー

gcc -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"cygwin-ruby16.dll\" 
-c io.c
In file included from /usr/include/time.h:32,
                 from /usr/include/sys/reent.h:14,
                 from /usr/include/stdlib.h:19,
                 from ruby.h:25,
                 from io.c:15:
/usr/include/sys/types.h:133: warning: empty declaration
/usr/include/sys/types.h:134: warning: empty declaration
io.c: In function `rb_read_pending':
io.c:179: structure has no member named `_cnt'
io.c: In function `rb_read_check':
io.c:186: structure has no member named `_cnt'
io.c: In function `rb_io_eof':
io.c:388: structure has no member named `_cnt'
io.c:389: structure has no member named `_cnt'
io.c: In function `io_fread':
以下多数のエラー。

cygwin gcc under Cygwin
./configure --enable-shared i386-mingw32
この時の make 時のエラー

cc -DNT -D__MSVCRT__ -g -O2  -I. -I. -I/usr/local/include -DLIBRUBY_SO=\"min
gw32-ruby16.dll\" -c array.c
In file included from win32/win32.h:78,
                 from defines.h:36,
                 from ruby.h:22,
                 from array.c:15:
/usr/include/w32api/winsock.h:78: warning: #warning "fd_set and associated
macros have been defined in sys/types.      This can cause runtime problems
with W32 sockets"
In file included from defines.h:36,
                 from ruby.h:22,
                 from array.c:15:
win32/win32.h:97: direct.h: No such file or directory
make: *** [array.o] Error 1

以上です。
ご指導のほどよろしくお願いいたします。
----------=========---------
Mitsuo Igarashi
mitsu5 / ruby.famille.ne.jp