bug#49935: gcc-4.8 fails to build with recent GCC versions

[Thomas Schwinge]

On 2021-08-07T20:07:32-0300, Thiago Jung Bauermann via Bug reports for GNU Guix 
<bug-guix@gnu.org> wrote:
> In file included from 
> /tmp/guix-build-gcc-4.8.5.drv-0/build/powerpc64le-unknown-linux-gnu/libstdc++-v3/include/cstdlib:72:0,
>                  from 
> ../../../../gcc-4.8.5/libstdc++-v3/libsupc++/del_op.cc:38:
> /gnu/store/358n1m2c8fbn6nr1mib4racjh7wfqfmy-gcc-10.3.0/include/c++/stdlib.h:38:12:
>  error: ‘std::abort’ has not been declared
>  using std::abort;
>             ^
> /gnu/store/358n1m2c8fbn6nr1mib4racjh7wfqfmy-gcc-10.3.0/include/c++/stdlib.h:39:12:
>  error: ‘std::atexit’ has not been declared
>  using std::atexit;
>             ^
> [...]

This looks similar to <https://issues.guix.gnu.org/41209>
"AVR toolchain fails to build", fixed by
commit fd96ae4a709c5509f2d78af3968d64fe805ad1ef
"gnu: avr-gcc: Fix conflicting GCC headers", or
<https://issues.guix.gnu.org/41210>
"gcc-cross-sans-libc-arm-none-eabi-4.9.4-1.227977 fails to build", fixed
by commit 7f6d3f395023ff430cf8b7a981d4780698e9d132
"gnu: gcc-arm-none-eabi: Fix conflicting GCC headers".