nobu	2016-09-04 15:25:38 +0900 (Sun, 04 Sep 2016)

  New Revision: 56069

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=56069

  Log:
    rbinstall.rb: install iff expected platforms [ci skip]
    
    * tool/rbinstall.rb (gem): install only gemspecs for expected
      platforms.  e.g., ignore json-java.gemspec in json gem.

  Modified files:
    trunk/tool/rbinstall.rb
Index: tool/rbinstall.rb
===================================================================
--- tool/rbinstall.rb	(revision 56068)
+++ tool/rbinstall.rb	(revision 56069)
@@ -760,6 +760,7 @@ install?(:ext, :comm, :gem) do https://github.com/ruby/ruby/blob/trunk/tool/rbinstall.rb#L760
     spec = Dir.chdir(dir) {
       Gem::Specification.load(File.basename(path))
     }
+    next unless spec.platform == Gem::Platform::RUBY
     spec.extension_dir = "#{extensions_dir}/#{spec.full_name}"
     if File.directory?(ext = "#{gem_ext_dir}/#{spec.full_name}")
       spec.extensions[0] ||= "-"

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