RISC-V and Ada: undefined references to `__gnat_raise_nodefer_with_msg'

[Eric Botcazou]

> It seems the a-except.adb was replaced by  a-except-2005.adb in this commit:

Right, it's by design, the old support for SJLJ exceptions has been ditched 
for full runtimes.  You probably just need to swap the values of

   Frontend_Exceptions       : constant Boolean := True;
   ZCX_By_Default            : constant Boolean := False;

in system-rtems.ads.

-- 
Eric Botcazou