ax_lib_mysql.m4 and -as-needed flag

[Sergio Belkin]

 I am using ax_lib_mysql.m4 in order to detect location of mysql libs,
   but the problem is that LD_FLAGS is a mixed if LD_FLAGS and LIBS:
   -rdynamic -L/usr/lib/mysql -lmysqlclient -lz -lcrypt -lnsl -lm -lssl
-lcrypto
   The problem is that I want only link against mysqlclient, so I want to
   add "--as-needed" be honored, how can I do that?

Thanks in advance!

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