mkmf.rb: expand all macros
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42223 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
mkmf.rb: expand all macros
expanded with RbConfig. [Bug #8702]
only once.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42223 b2dd03c8-39d4-4d8f-98ff-823fe69b080e