On 9/13/2021 1:31 AM, Richard Biener wrote:
This makes defaults.h choose DWARF2_DEBUG if PREFERRED_DEBUGGING_TYPE
is not specified by the target and NO_DEBUG if DWARF is not supported.
It also makes us warn when STABS is enabled and removes the corresponding
diagnostic from the Ada frontend. The warnings are pruned from the
testsuite output via prune_gcc_output.
This leaves the following targets without debug support:
pdp11-*-* pdp11 is a.out, dwarf support is difficult
m68k*-*-openbsd* it looks like this is a.out as well, at least it does
not pretend to support DWARF
hppa[12]*-*-hpux10* does seem to not support DWARF
I would probably argue that hpux10 should just be removed, along with
hpux 7-9 if they haven't been already. It's the epitome of a dead platform.
vax-*-openbsd* seems to be a.out as well, does not support DWARF
behavior will be like
./cc1 -quiet t.c -g
cc1: warning: target system does not support debug output
./cc1 -quiet t.c -gstabs
t.c: warning: STABS debugging information is obsolete and not supported anymore
that is, -g is unsupported but -gstabs will generate STABS (the above
is for pdp11). It would be nice if maintainers could confirm the above
listed configurations do not support DWARF and weight in whether to
(apart from pdp11) the specific configurations can be obsoleted or
adjusted. It looks like we do not have any openbsd maintainer.
I've discussed the situation for pdp11 with Paul already at some point
but we didn't reach any conclusion besides that it would be nice to
move pdp11 to ELF.
2021-09-10 Richard Biener <rguent...@suse.de>
gcc/
* defaults.h (PREFERRED_DEBUGGING_TYPE): Choose DWARF2_DEBUG
or NO_DEBUG.
* toplev.c (process_options): Warn when STABS debugging is
enabled.
gcc/ada/
* gcc-interface/misc.c (gnat_post_options): Do not warn
about DBX_DEBUG use here.
gcc/testsuite/
* lib/prune.exp: Prune STABS obsoletion message.
OK
jeff
