configure.in: unexpand exec_prefix etc

* configure.in: unexpand arch sitearch and exec_prefix values, so
  directly specified bindir, libdir, rubyprefix, etc can be properly
  substituted.  [ruby-core:52296] [Bug #7860]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39267 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io/console: compatibility with 1.9

* ext/io/console/console.c (rawmode_opt, console_dev): compatibility
  with ruby 1.9.  [ruby-core:52220] [Bug #7847]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39268 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io/console: compatibility with 1.8

* ext/io/console/console.c (console_dev): compatibility with ruby 1.8.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io/console: fix configuration failure

* ext/io/console/extconf.rb: fix configuration failure by missing
  cpp_include.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39270 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io/console: set HAVE_RB_SCAN_ARGS_OPTIONAL_HASH

* ext/io/console/extconf.rb: obtain optional hash by rb_scan_args() by
  default right now.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39271 b2dd03c8-39d4-4d8f-98ff-823fe69b080e