Hi,
after linking my database client application with a crypto library (as
shared library), I noticed that I couldn't connect to postgresql any
longer. Error message was "Password authentication failed".
After some time I found out that the issue was caused by both the crypto
library and libpq.so defining the symbol md5_hash.
After renaming the function name, the error went away.
Wouldn't it be a good idea to have all exported symbols in libpq.so
carry a postgres related prefix like 'PQ', 'pq', or 'pg_'? This way
symbol name clashes would become less probable.
Symbols in question (in this case for postgresql 8beta1) include:
EncryptMD5, SockAddr_cidr_mask, check_sigpipe_handler, freeaddrinfo_all,
getaddrinfo_all, getnameinfo_all, md5_hash, promote_v4_to_v6_addr,
promote_v4_to_v6_mask, rangeSockAddr, set_noblock.
Maybe not all of these functions need to be exported anyway?
Regards,
Martin