rtems assembler

[Joel Sherrill]

On Thu, Apr 30, 2020 at 9:21 AM suyash singh <suyashsingh234 at gmail.com>
wrote:

> I think it doesn't support sparc backend although it does not give unknown
> target error.
>
> I compiled this c program with
> export PATH=$HOME/quick-start/rtems/5/bin:"$PATH"
>  clang -target sparc-unknown-rtems5 test1.c
>
> *test1.c*
> int main(int argc, char **argv) {
>   int k = 0x7fffffff;
>   k += argc;
>   return 0;
> }
>
> same error
> /usr/bin/as: unrecognized option '-Av8'
> clang-11: error: assembler command failed with exit code 1
>
> If i write
> clang -target hello test1.c
> error: unknown target triple 'hello', please use -triple or -arch
>

You left the target name off.

clang -target sparc-unknown-rtems5 hello test1.c

>
> So I guess it is detecting sparc but not working with it
>
> On Thu, Apr 30, 2020 at 7:07 PM Hesham Almatary <heshamelmatary at gmail.com>
> wrote:
>
>>
>>
>> On Thu, 30 Apr 2020 at 14:18, suyash singh <suyashsingh234 at gmail.com>
>> wrote:
>>
>>>
>>> I am using ubuntu 18.04 terminal
>>>
>>> Here's the python script I wrote to find all include files and run clang
>>> -fsanitize
>>>
>>> # run with python3 in terminal
>>>
>>> import subprocess
>>> import os
>>>
>>> relativedir="../bsps/sparc/erc32/btimer"
>>> directory=os.path.join(os.getcwd(),"../")
>>> file="btimer.c"
>>> root_dir="ubsan"
>>>
>>> arr=['clang','-target','sparc','-
>>>
>> target needs to be sparc-unknown-rtems5 to pick up the correct tools.
>> Does your clang support sparc backend? Can you try to compile and link some
>> simple C program with it?
>>
>>
>>> fsanitize=undefined',"-I../../../../../../rtems/5/sparc-rtems5/erc32/lib/include","-I../../../../../../rtems/5/sparc-rtems5/include/"]
>>>
>>> for path, subdirs, files in os.walk(directory):
>>>         for subdir in subdirs:
>>>             if(subdir=="include"):
>>>                 includepath=os.path.join(path,subdir)
>>>                 idx=includepath.find("..")
>>>                 arr.append("-I../../../../"+includepath[idx+3:])
>>> arr.append(file)
>>> subprocess.run(arr,cwd=relativedir, stdout=subprocess.PIPE)
>>> #result=subprocess.run(['./a.out'],cwd=relativedir,
>>> stdout=subprocess.PIPE)
>>>
>>> On Thu, Apr 30, 2020 at 6:44 PM Hesham Almatary <
>>> heshamelmatary at gmail.com> wrote:
>>>
>>>>
>>>>
>>>> On Thu, 30 Apr 2020 at 13:51, Joel Sherrill <joel at rtems.org> wrote:
>>>>
>>>>>
>>>>>
>>>>> On Thu, Apr 30, 2020 at 7:34 AM suyash singh <suyashsingh234 at gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hello,
>>>>>> I was running clang UBSan on
>>>>>> bsps/sparc/erc32/btimer/btimer.c
>>>>>>
>>>>>> and got error
>>>>>>
>>>>>> /usr/bin/as: unrecognized option '-Av8'
>>>>>> clang-11: error: assembler command failed with exit code 1
>>>>>>
>>>>>> I am not sure but is it because clang is using wrong assembler?
>>>>>>
>>>>>
>>>>> I haven't seen anyone run into this in a long time. :)
>>>>>
>>>>> In this case, it is likely one of two things:
>>>>>
>>>>> + Look at your $PATH. Make sure the RTEMS tools are first.
>>>>>
>>>>> + But in your case, I expect that it is because the clang didn't
>>>>> know (somehow) to put the target name in front of the as.
>>>>> Did you invoke it for sparc-rtems5? If so, then there is a
>>>>> path through clang where it isn't looking at the target name.
>>>>>
>>>> That’s likely to be the problem. I expect Suyash isn’t cross compiling
>>>> with clang.
>>>>
>>>>
>>>>> I also double checked the as manual to ensure -Av8 was in
>>>>> fact a sparc option.
>>>>>
>>>>> --joel
>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> devel mailing list
>>>>>> devel at rtems.org
>>>>>> http://lists.rtems.org/mailman/listinfo/devel
>>>>>
>>>>> _______________________________________________
>>>>> devel mailing list
>>>>> devel at rtems.org
>>>>> http://lists.rtems.org/mailman/listinfo/devel
>>>>
>>>> --
>>>> Hesham
>>>> _______________________________________________
>>>> devel mailing list
>>>> devel at rtems.org
>>>> http://lists.rtems.org/mailman/listinfo/devel
>>>
>>> --
>> Hesham
>>
>
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