Anastasia resigned from this revision.
Anastasia added a comment.

In D97669#2687419 <https://reviews.llvm.org/D97669#2687419>, @benshi001 wrote:

> In D97669#2685698 <https://reviews.llvm.org/D97669#2685698>, @Anastasia wrote:
>
>> In D97669#2678460 <https://reviews.llvm.org/D97669#2678460>, @benshi001 
>> wrote:
>>
>>> In D97669#2676826 <https://reviews.llvm.org/D97669#2676826>, @Anastasia 
>>> wrote:
>>>
>>>> In D97669#2665865 <https://reviews.llvm.org/D97669#2665865>, @benshi001 
>>>> wrote:
>>>>
>>>>> In D97669#2661560 <https://reviews.llvm.org/D97669#2661560>, @Anastasia 
>>>>> wrote:
>>>>>
>>>>>> Is `stdio.h`  used by anything?
>>>>>
>>>>> No. `stdio.h` is not used. But if I do `#include <avr/interrupt.h>`, then 
>>>>> `-I /usr/lib/avr/include` must be specified in the command line option. 
>>>>> While avr-gcc does not reqiures that.
>>>>>
>>>>> I would like to keep clang & avr-gcc in the behaviour.
>>>>
>>>> Ok, do you plan to use it later? Then perhaps you should be adding it in 
>>>> the subsequent patches?
>>>
>>> No. No future pathes are needed. The avr-libc includes standard libc 
>>> (headers and libs) and avr specific headers and libs. This patch fixes all 
>>> of these issues. Both standard libc and avr platform specific libs can be 
>>> used without any explict command line option, just like avr-gcc does.
>>
>> Ok, so your patch is adding the following file
>>
>> `clang/test/Driver/Inputs/basic_avr_tree/usr/lib/avr/include/stdio.h`
>>
>> But it doesn't seem to be used at present? If you don't need it anywhere it 
>> should not be added.
>
> No. The `stdio.h` is still needed even it is not referred by any code in 
> current patch. It works as a placeholder for the directory 
> `clang/test/Driver/Inputs/basic_avr_tree/usr/lib/avr/include/`, and this 
> directory is needed in the test case `clang/test/Driver/avr-toolchain.c` of 
> current patch, and this directory can not exist without `stdio.h`.

Do you know why an empty directory is not sufficient?

Overall perhaps it makes more sense if someone with more experience on AVR 
reviews this change.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D97669/new/

https://reviews.llvm.org/D97669

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