* ext/ripper/extconf.rb: bison is not needed if ripper.c exists. [ruby-dev:25191]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7572 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 9 insertions, 2 deletions

diff --git a/ChangeLog b/ChangeLog
index 71b544831e..7b31839bdf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 16 04:02:28 2004  Minero Aoki  <aamine@loveruby.net>
+
+	* ext/ripper/extconf.rb: bison is not needed if ripper.c exists.
+	  [ruby-dev:25191]
+
 Thu Dec 16 03:27:10 2004  Minero Aoki  <aamine@loveruby.net>
 
 	* lib/net/http.rb: remove junk.
diff --git a/ext/ripper/extconf.rb b/ext/ripper/extconf.rb
index f1716b84c0..fd9370c337 100644
--- a/ext/ripper/extconf.rb
+++ b/ext/ripper/extconf.rb
@@ -5,8 +5,10 @@ require 'rbconfig'
 
 def main
   unless have_command('bison')
-    $stderr.puts 'Ripper requires bison; abort'
-    exit 1
+    unless File.exist?('ripper.c') or File.exist?("#{$srcdir}/ripper.c")
+      $stderr.puts 'missing bison; abort'
+      exit 1
+    end
   end
   $objs = %w(ripper.o)
   $cleanfiles.concat %w(ripper.y ripper.c ripper.E ripper.output eventids1.c ids1 ids2)