7.0 upgrade compile error

[Kris Kennaway]

Casey Scott wrote:
> I am trying to upgrade from 6.3 to 7.0. With latest source, buildworld dies
> with:
> 
> ...
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c: In function 'uw_install_context_1':
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:1472: warning: incompatible implicit declaration of built-in function 'abort'
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:1480: warning: incompatible implicit declaration of built-in function 'memcpy'
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:1486: warning: incompatible implicit declaration of built-in function 'memcpy'
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:1490: warning: incompatible implicit declaration of built-in function 'memcpy'
> In file included from /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind-dw2.c:1518:
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc: In function '_Unwind_RaiseException_Phase2':
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc:75: warning: incompatible implicit declaration of built-in function 'abort'
> /usr/src/gnu/lib/libgcc/../../../contrib/gcc/unwind.inc: In function '_Unwind_Resume':
> /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'

These are all non-fatal warnings, so it doesn't explain why the build 
stopped.

> *** Error code 1
> 
> Stop in /usr/src/gnu/lib/libgcc.
> *** Error code 1

Please show us more context.

Kris