* lib/yaml.rb: [DOC] Add links to syck and psych on github [Bug #9501]
  Based on a patch by Giorgos Tsiftsis [ci skip]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44893 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* configure.in (rb_cv_gnu_qsort_r): use compile error "conflicting
  types for 'qsort_r'" instead of AC_RUN_IFELSE.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44894 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* configure.in (rb_cv_bsd_qsort_r): ensure 'qsort_r' is not BSD version.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44895 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* configure.in: Fix compilation error.
  https://bugs.ruby-lang.org/issues/8358#note-16



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44896 b2dd03c8-39d4-4d8f-98ff-823fe69b080e