On Tue, 18 Apr 2023 18:26:18 PDT (-0700), Kito Cheng wrote:
And which -march -mabi you used will got issue?
On Wed, Apr 19, 2023 at 8:51 AM Palmer Dabbelt <pal...@rivosinc.com> wrote:
On Tue, 18 Apr 2023 17:47:31 PDT (-0700), Kito Cheng wrote:
> Do you mind shared gcc configure and the option you tried?
Just riscv-gnu-toolchain with "--enbale-multilib --enable-linux".
> On Wed, Apr 19, 2023 at 4:01 AM Palmer Dabbelt <pal...@rivosinc.com> wrote:
>>
>> On Tue, 18 Apr 2023 08:44:24 PDT (-0700), gcc-patches@gcc.gnu.org wrote:
>> >> Yep, if I drop the non-canonicial strings via
>> >>
>> >> diff --git a/gcc/config/riscv/multilib-generator
b/gcc/config/riscv/multilib-generator
>> >> index 58b7198b243..a63a4d69c18 100755
>> >> --- a/gcc/config/riscv/multilib-generator
>> >> +++ b/gcc/config/riscv/multilib-generator
>> >> @@ -174,7 +174,7 @@ for cmodel in cmodels:
>> >> ext_combs = expand_combination(ext)
>> >> alts = sum([[x] + [x + y for y in ext_combs] for x in [arch] +
extra], [])
>> >> alts = filter(lambda x: len(x) != 0, alts)
>> >> - alts = alts + list(map(lambda a : arch_canonicalize(a,
args.misa_spec), alts))
>> >> + alts = list(map(lambda a : arch_canonicalize(a, args.misa_spec),
alts))
>> >>
>> >> # Drop duplicated entry.
>> >> alts = unique(alts)
>> >>
>> >> then I can't link `-march=rv32imafdcv`, I need
>> >> `-march=rv32imacv_zicsr_zve32f_zve32x_zve64x_zvl128b_zvl32b_zvl64b`.
That's
>> >> kind of a headache for users to type in.
>> >
>> > Yes, that's a headache for users, but arch string canonicalization is
>> > hiddened at the process,
>> > so the user could still just use rv32imafdcv at compile time and
>> > multi-lib config.
>> >
>> > And the driver and multilib-generator (with arch_canonicalize) script
>> > will handle those headache in the background.
>>
>> Sorry, I'm not exactly sure what you're trying to say. I just rebuilt
>> GCC with this patch (and t-linux-multilib regenerated from it), it's not
>> resolving multlibs for the short names.
`-march=rv32imafdcv` is the broken one,
`-march=rv32imacv_zicsr_zve32f_zve32x_zve64x_zvl128b_zvl32b_zvl64b`
resolves multilibs (there's a bit more above).
