mkmf.rb: err by non existent file
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
mkmf.rb: err by non existent file
existent source file. [ruby-core:67962] [Bug #10821]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49487 b2dd03c8-39d4-4d8f-98ff-823fe69b080e