merge revision(s) 58084: [Backport #13361]
configure.in: syscall is deprecated on macOS * configure.in: syscall is no longer supported on macOS since 10.12. [ruby-core:80300] [Bug #13361]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@58193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 58084: [Backport #13361]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@58193 b2dd03c8-39d4-4d8f-98ff-823fe69b080e