io.c (rb_cloexec_fcntl_dupfd): this function needs F_DUPFD.
io.c (nogvl_io_cntl): use rb_cloexec_fcntl_dupfd() only if the platform has F_DUPFD.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
io.c (rb_cloexec_fcntl_dupfd): this function needs F_DUPFD.
io.c (nogvl_io_cntl): use rb_cloexec_fcntl_dupfd() only if the
platform has F_DUPFD.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@33578 b2dd03c8-39d4-4d8f-98ff-823fe69b080e