立石＠JAISTです。

PostgreSQL拡張モジュールが現在のRubyには
対応していませんでした。
以下のような修正はどうでしょうか？


diff -c -r -N postgres-old/Makefile.rb postgres/Makefile.rb
*** postgres-old/Makefile.rb	Fri Dec 12 20:12:02 1997
--- postgres/Makefile.rb	Thu Aug 13 08:10:12 1998
***************
*** 5,10 ****
--- 5,13 ----
  
  require "mkmf"
  
+ $LDFLAGS = ""
+ $CFLAGS = ""
+ 
  have_library("wsock32", "cygwin32_socket") or have_library("socket", "socket")
  have_library("inet", "gethostbyname")
  have_library("nsl", "gethostbyname")
***************
*** 23,30 ****
      $LDFLAGS = "-L" + libdir
      $CFLAGS += "-I" + libdir.gsub("lib", "include")
    else
!     $LDFLAGS = "-L/usr/local/pgsql/lib"
!     $CFLAGS += "-I/usr/local/pgsql/include"
    end
    if have_library("pq", "PQsetdb")
      create_makefile("postgres")
--- 26,36 ----
      $LDFLAGS = "-L" + libdir
      $CFLAGS += "-I" + libdir.gsub("lib", "include")
    else
!     $LDFLAGS = "-L/opt/local/pgsql/lib -lpq"
!     $CFLAGS += "-I/opt/local/pgsql/include"
!   end
!   if have_header("rubyio.h")
!     $CFLAGS += " -DHAVE_RUBYIO_H "
    end
    if have_library("pq", "PQsetdb")
      create_makefile("postgres")
diff -c -r -N postgres-old/postgres.c postgres/postgres.c
*** postgres-old/postgres.c	Fri Dec 12 20:12:02 1997
--- postgres/postgres.c	Thu Aug 13 08:09:36 1998
***************
*** 11,17 ****
--- 11,22 ----
  ************************************************/
  
  #include "ruby.h"
+ #ifdef HAVE_RUBYIO_H
+ #include "rubyio.h"
+ #else
  #include "io.h"
+ #endif
+ 
  
  #include <libpq-fe.h>
  #include <stdio.h>