Collin Funk wrote: > Out of personal interest, do you happen to know what platforms Emacs > builds on that lack 64-bit types?
This would have been my question as well. Because we are assuming the presence of 'long long' since 2019-12-22 [1], and 'long long' is 64-bits wide everywhere. I thought the 'u64' module is therefore obsolete. Bruno [1] https://lists.gnu.org/archive/html/bug-gnulib/2019-12/msg00190.html
