[compiler-rt] [sanitizer] intercept getservent_r, getservbyname_r, getservbyport_r (PR #133339)

[Florian Mayer via llvm-commits]

fmayer wrote:

> The man page says
> 
> ```
>        getservent_r(), getservbyname_r(), getservbyport_r():
>            Since glibc 2.19:
>                _DEFAULT_SOURCE
>            glibc 2.19 and earlier:
>                _BSD_SOURCE || _SVID_SOURCE
> ```
> 
> Will this change upset our glibc 2.18 users?

Doesn't that just mean the feature detection macro changed, not it was introduced in 2.19?

https://github.com/llvm/llvm-project/pull/133339