Which ports use C++?

[Toomas Aas]

Hello!

I'm planning to upgrade one of my servers from RELENG_5_2 to RELENG_5_3. 
In my reading of /usr/src/UPDATING I have reached the entry of 20040728 
which says that all programs written in C++ need to be recompiled. Ugh.

Is there an easy way to find out whether particular port uses C++? I had 
a quick look at bsd.port.mk but didn't see anything.

The ports I'm most interested in are apache2, mod_php4, mysql40-server, 
postfix and cyrus-imapd.

Or should I more or less expect that I need to rebuild *all* the ports 
anyway?