On 15 Feb 2022 00:02, Hans-Peter Nilsson via Gdb-patches wrote:
> But, save and restore CFLAGS_FOR_TARGET around the modification and
> use where needed, to not have the CRIS-specific modification affect a
> continuing test-run (possibly for other targets).

this part isn't needed by design.  every .exp file calls `sim_init` which in
turn calls `sim_init_toolchain` which fully initializes the toolchain for the
current file.  so as soon as c.exp finishes running, whatever comes next is
going to reset the flags you saved.
-mike