Comment by rcxdude
9 hours ago
Individual functions may have a lot of different versions. They do only update them if there is an ABI change (so you may have e.g. f1_v1, f1_v2, f2_v2, f2_v3 as synbols in v3 of glibc) but there's no easy way to say 'give me v2 of every function'. If you compile against v3 you'll get f2_v3 and f1_v2 and so it won't work on v2.
Why are they changing? And I presume there must be disadvantages to staying on the old symbols, or else they wouldn’t be changing them—so what are those disadvantages?