help making new port: config err "amd64-unknown-freebsd7.0 not supported"

[Steve Franks]

I'm trying to build the devel/arm-elf-gcc295 port for the more modern gcc4.2.3.

What I've done: edited devel/arm-elf-gcc295/Makefile to change version
2.95 to 4.2.3, removed patches for v295, ran make makesum, ran "make".

This error seems like something pretty obvious, not having done it
before, however....

Thanks,
Steve

...
checking whether sigaltstack is declared... yes
checking for struct tms... yes
checking for clock_t... yes
checking for .preinit_array/.init_array/.fini_array support... no
checking if mkdir takes one argument... no
*** Configuration amd64-unknown-freebsd7.0 not supported
*** Error code 1

Stop in /usr/ports/devel/arm-elf-gcc/work/gcc-4.2.3.
*** Error code 1

Stop in /usr/ports/devel/arm-elf-gcc/work/gcc-4.2.3.
*** Error code 1

Stop in /usr/ports/devel/arm-elf-gcc/work/gcc-4.2.3.
[steve at dystant /usr/ports/devel/arm-elf-gcc/work/gcc-4.2.3]$