On 28/02/12 15:51, Richard Earnshaw wrote:
> On 28/02/12 15:38, Joseph S. Myers wrote:
>> On Tue, 28 Feb 2012, Richard Earnshaw wrote:
>>
>>> So how about we just deprecate all targets that are still using FPE format?
>>
>> This patch appears to add back the i[34567]86-*-interix3* deprecation -
>
> Oops, botched merge conflict.
>
>> removed deliberately when the target got a maintainer - and
>> arm-wrs-vxworks is *not* using FPE format, vxworks.h defines
>> FPUTYPE_DEFAULT to "vfp".
>
> Easily fixed.
>
> Darn, missed the Win-CE port...
>
>
> Otherwise, I think this is OK (given a
>> corresponding change to gcc-4.7/changes.html to note these deprecations).
>>
>
> I would expect, something like:
>
> All ARM targets using the legacy FPA floating-point format have been
> obsoleted. These include the ARM ports for FreeBSD, Linux (old ABI),
> ucLinux (old ABI), rtems (old ABI), Ecos, Win-CE and the old ELF
> bare-metal configurations.
>
> I'm a bit unhappy about the general wording there. I don't particularly
> want these ports reviving. I'd rather see configurations that don't use
> the FPA format floats being contributed. Suggestions?
>
> R.
>
>
Here's an updated patch and a suggested web-page patch:
R.
--- config.gcc (revision 184639)
+++ config.gcc (local)
@@ -242,7 +242,18 @@ md_file=
# Obsolete configurations.
case ${target} in
+ # Avoid special cases that are not obsolete
+ arm*-*-*eabi* \
+ )
+ ;;
alpha*-dec-osf5.1* \
+ | arm*-*-ecos-elf \
+ | arm*-*-elf \
+ | arm*-*-freebsd* \
+ | arm*-*-linux* \
+ | arm*-*-rtems* \
+ | arm*-*-uclinux* \
+ | arm*-*-wince* \
| mips-sgi-irix6.5 \
| mips*-*-openbsd* \
| score-* \
@@ -3043,12 +3054,20 @@ case "${target}" in
case "$with_fpu" in
"" \
- | fpa | fpe2 | fpe3 | maverick | vfp | vfp3 | vfpv3 \
+ | vfp | vfp3 | vfpv3 \
| vfpv3-fp16 | vfpv3-d16 | vfpv3-d16-fp16 | vfpv3xd \
| vfpv3xd-fp16 | neon | neon-fp16 | vfpv4 | vfpv4-d16 \
| fpv4-sp-d16 | neon-vfpv4)
# OK
;;
+ fpa | fpe2 | fpe3 | maverick)
+ if test "x$enable_obsolete" != xyes; then
+ echo "*** Configuration option
--with-fpu=${with_fpu} is obsolete." >&2
+ echo "*** Specify --enable-obsolete to build it
anyway." >&2
+ echo "*** Support will be REMOVED in the next major
release of GCC." >&2
+ exit 1
+ fi
+ ;;
*)
echo "Unknown fpu used in --with-fpu=$with_fpu" 2>&1
exit 1Index: changes.html
===================================================================
RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-4.7/changes.html,v
retrieving revision 1.90
diff -u -r1.90 changes.html
--- changes.html 27 Feb 2012 00:33:29 -0000 1.90
+++ changes.html 28 Feb 2012 16:55:56 -0000
@@ -35,6 +35,35 @@
</li>
+ <li>Support on ARM for the legacy floating-point accelerator (FPA) and
+ the mixed-endian floating-point format that it used has been obsoleted.
+ The ports that still use this format have been obsoleted as well.
+ Many legacy ARM ports already provide an alternative that uses the
+ VFP floating-point format. The obsolete ports will be deleted in the
+ next release.
+
+ <p>The obsolete ports with alternatives are:</p>
+
+ <ul>
+ <li>arm-*-rtems (use arm-*-rtemseabi)</li>
+ <li>arm-*-linux-gnu (use arm-*-linux-gnueabi)</li>
+ <li>arm-*-elf (use arm-*-eabi)</li>
+ <li>arm-*-uclinux-gnu (use arm-*-uclinux-gnueabi)</li>
+ </ul>
+ <p>Note, however, that these alternatives are not binary compatible
+ with their legacy counterparts (although some can support running legacy
+ applications).</p>
+ <p>The obsolete ports that currently lack a modern alternative are:</p>
+
+ <ul>
+ <li>arm-*-ecos-elf</li>
+ <li>arm-*-freebsd</li>
+ </ul>
+
+ New ports that support more recent versions of the architecture
+ are welcome.</li>
+ <li>Support for the Maverick co-processor on ARM has been obsoleted.
+ Code to support it will be deleted in the next release.</li>
<li>Support has been removed for Unix International threads on Solaris
2, so the <code>--enable-threads=solaris</code> configure option and
the <code>-threads</code> compiler option don't work any longer.</li>
