The mkstemp you are seeing is probably the one from gnulib. A lot of GNU software uses their own versions if they detect the platform one is broken; it may be

The mkstemp you are seeing is probably the one from gnulib. A lot of GNU software uses their own versions if they detect the platform one is broken; it may be incorrectly replacing it in this case. https://www.gnu.org/software/gnulib/manual/html_node/mkstemp.html https://www.gnu.org/software/gnulib/manual/html_node/mkstemp... https://github.com/emacs-mirror/emacs/blob/65eee8392ff95f58f7b0bd036e1fe065523658c6/lib/stdlib.in.h#L386-L415 https://github.com/emacs-mirror/emacs/blob/65eee8392ff95f58f...