| 1 |
On 12/29/2013 09:52 PM, Anthony G. Basile wrote: |
| 2 |
> On 12/29/2013 04:48 PM, Markos Chandras wrote: |
| 3 |
>> On 12/29/2013 09:48 PM, Michał Górny wrote: |
| 4 |
>>> Dnia 2013-12-29, o godz. 16:40:08 |
| 5 |
>>> Joshua Kinard <kumba@g.o> napisał(a): |
| 6 |
>>> |
| 7 |
>>>> On 12/28/2013 5:58 PM, Michał Górny wrote: |
| 8 |
>>>>> I've noticed today that mips uses the same CHOST value for all three |
| 9 |
>>>>> ABIs it supports: |
| 10 |
>>>>> |
| 11 |
>>>>> arch/mips/mips64/multilib/make.defaults:CHOST_o32="${CHOST}" |
| 12 |
>>>>> arch/mips/mips64/multilib/make.defaults:CHOST_n32=${CHOST} |
| 13 |
>>>>> arch/mips/mips64/multilib/make.defaults:CHOST_n64=${CHOST} |
| 14 |
>>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_o32="${CHOST}" |
| 15 |
>>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_n32="${CHOST}" |
| 16 |
>>>>> arch/mips/mipsel/mips64el/multilib/make.defaults:CHOST_n64="${CHOST}" |
| 17 |
>>>>> |
| 18 |
>>>>> [...] |
| 19 |
>>>> |
| 20 |
>>>> Matt can probably vouch for this better, but the only two ABIs |
| 21 |
>>>> affected by |
| 22 |
>>>> this are n32 and n64. mips[el]-unknown-linux-gnu implies a 32-bit |
| 23 |
>>>> big/little endian CHOST, which means the o32 ABI. |
| 24 |
>>>> mips64[el]-unknown-linux-gnu means either n32 or n64. So no change |
| 25 |
>>>> should |
| 26 |
>>>> be needed for o32-based installs. |
| 27 |
>>> |
| 28 |
>>> Just to be clear: |
| 29 |
>>> |
| 30 |
>>> profiles/arch/mips/mipsel/mips64el/multilib/make.defaults: |
| 31 |
>>> |
| 32 |
>>> CHOST="mips64el-unknown-linux-gnu" |
| 33 |
>>> |
| 34 |
>>> [...] |
| 35 |
>>> |
| 36 |
>>> CFLAGS_o32="-mabi=32" |
| 37 |
>>> CHOST_o32="${CHOST}" |
| 38 |
>>> |
| 39 |
>>> CFLAGS_n32="-mabi=n32" |
| 40 |
>>> CHOST_n32="${CHOST}" |
| 41 |
>>> |
| 42 |
>>> CFLAGS_n64="-mabi=64" |
| 43 |
>>> CHOST_n64="${CHOST}" |
| 44 |
>>> |
| 45 |
>>> So in this case, o32 actually uses mips64el-unknown-linux-gnu, unless |
| 46 |
>>> I'm missing something. |
| 47 |
>>> |
| 48 |
>> |
| 49 |
>> Yes all 3 ABIs use the same tuple. |
| 50 |
>> |
| 51 |
> |
| 52 |
> I think people are missing Mike's point from earlier, which is that |
| 53 |
> tuples label toolchains and a toolchain can support multiple abis. So |
| 54 |
> for example, what would one do on a system which simultaneously has o32, |
| 55 |
> n32 and n64? -gnuabi32n32n64 looks pretty crazy. |
| 56 |
> |
| 57 |
There is only one default ABI, so the toolchain should be named after |
| 58 |
that. But that does not mean the toolchain can't build for different ABIs |
| 59 |
|
| 60 |
-- |
| 61 |
Regards, |
| 62 |
Markos Chandras |
Archives