extmk.rb: cygwin case

* ext/extmk.rb: add cygwin case, nothing excluded.
  [ruby-core:73806] [Bug#12071]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53868 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 1 deletions

diff --git a/ext/extmk.rb b/ext/extmk.rb
index 3efecbc28a..d2832c5aa2 100755
--- a/ext/extmk.rb
+++ b/ext/extmk.rb
@@ -494,7 +494,10 @@ end unless $extstatic
 ext_prefix = "#{$top_srcdir}/ext"
 exts = $static_ext.sort_by {|t, i| i}.collect {|t, i| t}
 default_exclude_exts =
-  if $mswin or $mingw
+  case
+  when $cygwin
+    %w''
+  when $mswin, $mingw
     %w'pty syslog'
   else
     %w'*win32*'