[Buildroot] [MIPS] toolchain/gcc/Config.in broken
skuribay at ruby.dti.ne.jp
Tue Oct 9 13:57:32 UTC 2007
Bernhard Fischer wrote:
>>  mips: Before recently toolchain config rework (2007-09-19 build)
> I don't know offhand what abi that defaults to. Can you check this,
Yes, confirmed with r19885 (2007-09-18).
At that time, we used to configure ABI and ISA as a uClibc config,
right? I always configured O32 ABI and MIPS32, no doubt:
* Target Architecture Features and Options
> 1. O32 ABI (CONFIG_MIPS_O32_ABI) (NEW)
2. N32 ABI (CONFIG_MIPS_N32_ABI) (NEW)
3. N64 ABI (CONFIG_MIPS_N64_ABI) (NEW)
Target Processor Architecture
> 1. Generic (MIPS I) (CONFIG_MIPS_ISA_1) (NEW)
2. MIPS II (CONFIG_MIPS_ISA_2) (NEW)
3. MIPS III (CONFIG_MIPS_ISA_3) (NEW)
4. MIPS IV (CONFIG_MIPS_ISA_4) (NEW)
5. MIPS32 (CONFIG_MIPS_ISA_MIPS32) (NEW)
6. MIPS64 (CONFIG_MIPS_ISA_MIPS64) (NEW)
But it seems these configs were not directly passed to GCC configs
according to mips-linux-gcc -v, or GCC config.status.
>>  mips: Current trunk build with a change (for testing)
>> skuribay at debian:~/devel/buildroot$ svn diff
>> Index: target/Config.in.arch
>> --- target/Config.in.arch (revision 20207)
>> +++ target/Config.in.arch (working copy)
>> @@ -689,7 +689,7 @@
>> default iwmmxt if BR2_iwmmxt
>> default 32 if BR2_mipsel && BR2_MIPS_OABI
>> default n32 if BR2_mipsel && BR2_MIPS_EABI
>> - default o64 if BR2_mips && BR2_MIPS_OABI
>> + default 32 if BR2_mips && BR2_MIPS_OABI
> I'm pretty sure that this is not really correct either.
Yes, it's just a trial whether --with-abi=32 works for mips or not.
I don't know what is appropriate in this case, sorry.
> I will extend these (for mips) to include "ABI32" which boils down to
> But think about your change for a second. For mips EB you want to allow
> for 32bit (1,2,32*) and 64bit where 32bit OABI should use =32 but 64bit
> OABI should use =o64 as opposed to 64bit ABI32 (=32), 64bit EABI
> (=eabi), 64bit ABI64 (=64), at least AFAICT.
> Does this sound appropriate to you?
Ditto, it's hard for me to answer. I should learn more about GCC config.
Anyone MIPS guys?
Anyway thanks for your consideration,
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