Ruby

merge revision(s) 5cdf99f64e344b8e4638824d55f5caf33be682ca: [Backport #17761]

 mkmf: fixed install directories of header files in extension libraries [Bug #17761] When installing an extension library which provides a header, that header should be installed under site_ruby (or vendor_ruby when "--vendor" option was given to extconf.rb). However, currently this file is about to be installed in the core include directory. --- lib/mkmf.rb | 8 ++++---- test/mkmf/test_install.rb | 30 ++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+), 4 deletions(-) create mode 100644 test/mkmf/test_install.rb