mkconfig.rb: cross_compiling option
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53969 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
mkconfig.rb: cross_compiling option
Makefile, but not from rbconfig.rb, which is just going to be
created by this command.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53969 b2dd03c8-39d4-4d8f-98ff-823fe69b080e