* ext/etc/mkconstants.rb: remove empty comments, defaut_proc isn't called by accessing nil-assigned elements, and the same content is useless. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* ext/etc/extconf.rb: Check sysconf(), confstr() and fpathconf(). * ext/etc/mkconstants.rb: New file. [ruby-core:62600] [Feature #9842] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45984 b2dd03c8-39d4-4d8f-98ff-823fe69b080e