Odd Formatting in CPU Supplement
sebastian.huber at embedded-brains.de
Wed May 22 05:11:52 UTC 2019
On 21/05/2019 15:29, Joel Sherrill wrote:
> On Mon, May 20, 2019 at 11:19 PM Sebastian Huber
> <sebastian.huber at embedded-brains.de
> <mailto:sebastian.huber at embedded-brains.de>> wrote:
> Hello Joel,
> it is in line what GCC prints:
> riscv-rtems5-gcc -print-multi-lib
> rv32i/ilp32;@march=rv32i at mabi=ilp32
> rv32im/ilp32;@march=rv32im at mabi=ilp32
> rv32imafd/ilp32d;@march=rv32imafd at mabi=ilp32d
> rv32iac/ilp32;@march=rv32iac at mabi=ilp32
> rv32imac/ilp32;@march=rv32imac at mabi=ilp32
> rv32imafc/ilp32f;@march=rv32imafc at mabi=ilp32f
> rv64imafd/lp64d;@march=rv64imafd at mabi=lp64d
> rv64imafd/lp64d/medany;@march=rv64imafd at mabi=lp64d at mcmodel=medany
> rv64imac/lp64;@march=rv64imac at mabi=lp64
> rv64imac/lp64/medany;@march=rv64imac at mabi=lp64 at mcmodel=medany
> rv64imafdc/lp64d;@march=rv64imafdc at mabi=lp64d
> rv64imafdc/lp64d/medany;@march=rv64imafdc at mabi=lp64d at mcmodel=medany
> Ahh .. that explains where it came from. I realized what it was
> as soon as I saw that the formatting was intentional.
> I don't mind to change it, but it should be consistent with ARM.
> I assumed it was repeated somewhere else.
> I understand the "." is the top of the lib directory but honestly
> looking at that
> output confused me. That can't be a good indication that it is going to be
> meaningful for someone not familiar with multilibs. Was my suggestion
> * default (.): XXX
What about . (default):?
> And this follow up discussion makes me wonder if there should be some
> generic discussion of multilibs in the porting advice. Adding new CPU
> variants, optimizations, etc. can result in tinkering. Plus RTEMS tool
> tend to deviate a bit from the generic *-elf tools.
There is some multilib content here which should cover the view point of
Adding something about multilibs to a CPU port developer documentation
would be definitely helpful, but where is the CPU port developer
Sebastian Huber, embedded brains GmbH
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