"Implicit declaration of built-in function" upgrading to 7.0

[Kris Kennaway]

Ruben Lara wrote:
> Hi!
> 
> I solved problem with memory, but now, make buildworld crash with next error:
> 
> ....
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc:238: warning: incompatible implicit declaration of built-in function ´abort´
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc:In function ´_Unwind_Resume_or_Rethrow´:
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc:263: warning: incompatible implicit declaration of built-in function ´abort´
> *** Error code 1
> .....
> 
> Anybody can help me¿¿?

Probably because you set CFLAGS= (no optimization).  Note that no-one 
told you to do that :-)

Kris