[Bug ada/100486] Ada build fails for 32bit Windows

[ofv at wanadoo dot es]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100486

--- Comment #10 from ofv at wanadoo dot es ---
Setting CFLAGS/CXXFLAGS/BOOT_CFLAGS to -dwarf-4 has no effect: the build fails
the same.