[OB PATCH] Build two gdb.cp testcases with -Wno-unused-comparison

[Tom Tromey]

>>>>> "Gary" == Gary Benson via Gdb-patches <gdb-patches@sourceware.org> writes:

Gary> +if { [prepare_for_testing "failed to prepare" ${testfile} ${srcfile} \
Gary> +      {debug c++ additional_flags=-Wno-unused-comparison}] } {

Won't this cause build (and therefore test) failures if the compiler
does not accept this option?

I wonder if there's a way to fix the warning in the C++ source file
instead.

Tom