> I successfully built flac-1.1.2 from pkgsrc-current on a Solaris 10
> system using gcc-3.3.5 and other tools from pkgsrc-current with
> CFLAGS=-O2 -mcpu ultrasparc -mvis

I'm surprised that Solaris 10 fixes this; everything else seems to be 
the same.

> If you want to see a build log, look at:
> http://backyard.homeunix.net/~ben/docs/comp/unix/netbsd/pkgsrc/flac.txt

I tried to match your configure options as closely as possible (add 
gettext-lib/buildlink3.mk to get iconv detected, remove nasm on my 
system), to no avail.

> What do you think of only disabling -mcpu=ultrasparc in the case of
> Solaris 9?

Works for me, although I wonder if something odd in my setup is 
actually the cause.

Simon