I think the issue is a bit more complex :
- linux doesn't support a single libc
- glibc doesn't support a single OS
In practice we all know (believe?) that both statements above are
true but in practice 99% of the time there's a 1:1 relation between
these two components.
The top linux C library is probably the Android one. Given the number
of containers now running Alpine and the number of embedded devices it's
probably a good fight going on for 2nd, 3rd and 4th. It is certainly not
a Linux/Glibc world any more.
Alan