apache: size mismatch symbol(_res) and symbol(_sys_errlist)

[Lou Hevly]

Greetings:

After doing an update from 3.7 to 3.8, when starting up apache using:
'/usr/sbin/httpd -u -DSSL'

I get the following message, which I don't understand:

/usr/sbin/httpd:/usr/lib/libc.so.34.2: /usr/lib/libc.so.38.2 : WARNING: 
symbol(_res) size mismatch, relink your program
/usr/sbin/httpd:/usr/lib/libc.so.34.2: /usr/lib/libc.so.38.2 : WARNING: 
symbol(_sys_errlist) size mismatch, relink your program

The server works fine.

Then, after upgrading to 3.9, I get a similar message:

/usr/sbin/httpd:/usr/lib/libc.so.34.2: /usr/lib/libc.so.39.0 : WARNING: 
symbol(_res) size mismatch, relink your program
/usr/sbin/httpd:/usr/lib/libc.so.34.2: /usr/lib/libc.so.39.0 : WARNING: 
symbol(_sys_errlist) size mismatch, relink your program

Can anyone please explain what the problem is here?

Thank-you.