stunnel build chokes on -no-undefined

[Andrew Schulman]

> From a quick peek at the source, you should make this change in src/Makefile.am
> 
> -libstunnel_la_LDFLAGS = -avoid-version
> +libstunnel_la_LDFLAGS = -avoid-version -no-undefined

Right - thanks.  Yep, that takes care of it.

> and then hope that libstunnel has no undefined symbols that need to be
> provided by someone else to link a whole program. Most libraries do not
> have such undefined symbols. You can probably send that change upstream.
> 
> Where did -Wl,-no-undefined come from?

It was added to CFLAGS in the cygport file.  I don't remember why, but I
probably added it myself some time in the past.  Oops.  I've taken it out again
now.

Thanks a lot for your help.

Andrew