> From: Jeff Law <l...@redhat.com>
> Date: Fri, 20 Sep 2019 17:38:38 +0200
Hi. I'm not going to question
> The first step in that process is to drop support for cc0.
but could you please elaborate on...
> [cc0 support in gcc core]
> code is broken in various ways,
> particularly WRT exceptions.
...that last part?
If you mean asynchronous exceptions then perhaps in theory,
except there's no need to (and no state to) "unwind" to
in-between cc0 setter and user. But I guess that goes for
"MODE_CC" targets too; exception information isn't that precise.
> This patch deprecates the affected targets.
(Not applied yet? Before the gcc-10 branch? Can you please
consider dropping cris* from that part when rebasing it, as per
contents on master and my pledge to merge axis/cris-decc0?)
> diff --git a/gcc/config.gcc b/gcc/config.gcc
> index 69d0a024d85..0c1637e8be1 100644
> --- a/gcc/config.gcc
> +++ b/gcc/config.gcc
> @@ -248,6 +248,12 @@ md_file=
> # Obsolete configurations.
> case ${target} in
> tile*-*-* \
> + avr*-*-* \
> + h8300*-*-* \
> + cris*-*-* \
> + m68k*-*-* \
> + vax*-*-* \
> + cr16*-*-* \
> )
> if test "x$enable_obsolete" != xyes; then
> echo "*** Configuration ${target} is obsolete." >&2
> @@ -273,7 +279,6 @@ case ${target} in
> | arm*-*-uclinux* \
> | i[34567]86-go32-* \
> | i[34567]86-*-go32* \
> - | m68k-*-uclinuxoldabi* \
> | mips64orion*-*-rtems* \
> | pdp11-*-bsd \
> | powerpc*-*-linux*paired* \
> @@ -294,7 +299,6 @@ case ${target} in
> | *-*-solaris2.[0-9].* \
> | *-*-solaris2.10* \
> | *-*-sysv* \
> - | vax-*-vms* \
> )
> echo "*** Configuration ${target} not supported" 1>&2
> exit 1
Beware, the two last hunks shouldn't be applied, else the patch
will actually make m68k-*-uclinuxoldabi* andvax-*-vms* available
(by --enable-obsolete).
That part would go in when actually removing the targets.
I may have lost track of the conversation that followed; maybe
the patch was itself obsoleted.
brgds, H-P
