Not familiar with autoconf, but I found the following snippet in autoconf code.
https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/c.m4?h=v2.69#n179
```
#if defined __stub_$1 || defined __stub___$1
choke me
#endif
```
I checked on GNU Hurd, __stub_getrandom is defined.
Good finding! That seems like the right workaround.
I mean, no, it relies on an internal ftm, so it's definitely ugly,
and glibc should be fixed, but in the meantime, if that's good enough
for autoconf, that's good enough for me.
Thanks,
--
Laurent