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a28e44c344
Take in account that POSIX standard Issue 7 drops h_errno support. Now, we also consider getaddrinfo() to be thread-safe when (_POSIX_C_SOURCE >= 200809L) or (_XOPEN_SOURCE >= 700) independently of whether h_errno exists or not. Take in account that h_errno might be a modifiable lvalue not defined as a C preprocessor macro.