FWIW, I am still seeing this failure with the
latest snapshot. BTW, this snapshot fails for me
in libstdc++-v3 configury itself, dying with a
"unable to detect exception model" error - it
proceeds further *only if* I specify
"--disable-sjlj-exceptions" - it seems that the
generated code for the auto detect test
case no longer has any reference to "Unwind_xxx"
functions as it expects.
I also note that cc1, cc1plus and jc1 all ICE
with a segfault if invoked as is without any
input filename! There was some recent talk on
this, but the discussion really didn't get any
where AFAICT. All of the three fail in
output_file_directive( ) in toplev.c because
main_input_filename is NULL. (This a regression
from 3.3.)