make-snapshot: no loading unexpected libraries

* tool/make-snapshot (package): get rid of loading unbundled and
  unexpected libraries.  [ruby-core:67977] [Bug #10822]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49551 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Mon Feb  9 16:36:12 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* tool/make-snapshot (package): get rid of loading unbundled and
+	  unexpected libraries.  [ruby-core:67977] [Bug #10822]
+
 Sun Feb  8 20:09:37 2015  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* lib/net/http/header.rb: pass header names as symbols.

tool/make-snapshot

@@ -283,7 +283,10 @@ def package(vcs, rev, destdir, tmp = nil)
       }
       FileUtils.mkpath(hdrdir = "#{extout}/include/ruby")
       File.open("#{hdrdir}/config.h", "w") {}
-      miniruby = ENV['MINIRUBY'] + " -I. -rcross"
+      FileUtils.mkpath(defaults = "#{extout}/rubygems/defaults")
+      File.open("#{defaults}/operating_system.rb", "w") {}
+      File.open("#{defaults}/ruby.rb", "w") {}
+      miniruby = ENV['MINIRUBY'] + " -I. -I#{extout} -rcross"
       mk = IO.read("Makefile.in").gsub(/^@.*\n/, '').gsub(/@([A-Za-z_]\w*)@/) {ENV[$1]}
       mk << commonmk.gsub(/(?<!#)\{[^{}]*\}/, "")
       cmd = %W[make -f -