diff --git a/ChangeLog b/ChangeLog
index 2fcfd65abc..432140caf9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Aug  2 15:11:54 2003  WATANABE Hirofumi  <eban@ruby-lang.org>
+
+	* ext/extmk.rb (--no-undefined): annoying option removed.
+
 Sat Aug  2 14:53:55 2003  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/mkmf.rb (pkg_config): get configuration by pkg-config.  [new]
diff --git a/ext/extmk.rb b/ext/extmk.rb
index 3a6d499557..68274efde6 100644
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -10,7 +10,6 @@ $extinit = nil
 $extobjs = nil
 $ignore = nil
 $message = nil
-$use_no_undef = nil
 
 $progname = $0
 alias $PROGRAM_NAME $0
@@ -34,12 +33,6 @@ $topdir = File.expand_path(".")
 $top_srcdir = srcdir
 $hdrdir = $top_srcdir
 
-if not $use_no_undef and /linux/ =~ RUBY_PLATFORM and
-   $configure_args['--enable-shared'] and
-   CONFIG["GNU_LD"] == "yes"
-  $use_no_undef = 0 <= (`ld -v`.scan(/\d+/).map{|x| x.to_i} <=> [2, 11])
-end
-
 def sysquote(x)
   @quote ||= /human|os2|macos/ =~ (CROSS_COMPILING || RUBY_PLATFORM)
   @quote ? x.quote : x
@@ -60,10 +53,6 @@ def extmake(target)
 
   init_mkmf
 
-  if $use_no_undef
-    $DLDFLAGS << " -Wl,--no-undefined"
-  end
-
   begin
     dir = Dir.pwd
     File.mkpath target unless File.directory?(target)