On Thu, Dec 2, 2021, at 10:01 AM, David Howells via Libc-alpha wrote: > Zack Weinberg <zack@xxxxxxxxxxxx> wrote: >> I could be persuaded otherwise with an example of a program for which >> changing __s64 from 'long long' to 'long' would break *binary* backward >> compatibility, or similarly for __u64. > > C++ could break. That's too hypothetical to be actionable. I would like to see a _specific program_, and I would like it to be one that already exists in the world and was not written as a test case for this hypothetical ABI break. zw