On 16/12/11 18:53, Joseph S. Myers wrote:
> On Fri, 9 Dec 2011, Richard Earnshaw wrote:
>
>> I think we've reached the point where the following target
>> configurations should be End-of-Life'd. As such, I'd like to mark them
>> as deprecated in gcc-4.7, prior to removal after the branch.
>
> I agree it's time to remove these old-ABI ports - and old-ABI uClinux
> should be deprecated / removed as well. I intend to remove the old-ABI
> support in glibc at some point (it's bitrotten and just confuses people
> without actually building).
>
>> I'd also like to remove at that time support for some now obsolete
>> co-processor units, namely the FPA and Maverick.
>
> Note that there's a default in arm.c
>
> #ifdef FPUTYPE_DEFAULT
> target_fpu_name = FPUTYPE_DEFAULT;
> #else
> if (arm_arch_cirrus)
> target_fpu_name = "maverick";
> else
> target_fpu_name = "fpe2";
> #endif
>
> meaning some targets default to FPA when no -mfpu= optionis passed, and
> removing FPA means changing the ABI for these ports. It looks like these
> are: arm*-*-freebsd* arm*-*-uclinux* (old-ABI) arm*-*-ecos-elf
> arm*-*-rtems* (old-ABI) arm*-*-elf arm*-wince-pe*. My presumption is that
> VFP format will be better for anyone currently using the FreeBSD and WinCE
> ports (while as discussed the others are deprecation candidates), though
> the FreeBSD port is probably rather bitrotten and much of the current
> WinCE support for GCC isn't upstream.
>
So how about we just deprecate all targets that are still using FPE format?
--- gcc/config.gcc (revision 184639)
+++ gcc/config.gcc (local)
@@ -242,7 +242,19 @@ md_file=
# Obsolete configurations.
case ${target} in
+ # Avoid special cases that are not obsolete
+ arm*-*-*eabi* \
+ )
+ ;;
alpha*-dec-osf5.1* \
+ | arm-wrs-vxworks \
+ | arm*-*-ecos-elf \
+ | arm*-*-elf \
+ | arm*-*-freebsd* \
+ | arm*-*-linux* \
+ | arm*-*-rtems* \
+ | arm*-*-uclinux* \
+ | i[34567]86-*-interix3* \
| mips-sgi-irix6.5 \
| mips*-*-openbsd* \
| score-* \
@@ -3043,12 +3055,20 @@ case "${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--with-fpu=${with_fpu} is obsolete."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 1
