So much thanks! I will have a look at how distutils work and try to figure
out whether I can fix this dependency problem.
Ralf Gommers <ralf.gomm...@gmail.com> 于2022年11月2日周三 17:13写道：
>
>
> On Wed, Nov 2, 2022 at 9:30 AM 腾刘 <27rabbi...@gmail.com> wrote:
>
>> Hi everyone! I 'm here again.
>>
>> Recently I 'm trying to understand the C code with output-debug method,
>> inserting many print statements. I was doing well with it until one day: I
>> changed a file called loops_utils.h.src located in numpy/core/src/umath by
>> inserting some "printf", but after I re-built the Numpy from source, the
>> changes didn't apply.
>>
>> Specifically, I added:
>>
>> printf(" ??????? ");
>>
>> in line 80, but after re-building it didn't output "??????".
>>
>> I found that when I ran "python setup.py build_ext --inplace", the output
>> info seemed to tell me that nothing has been compiled, because normally
>> when something changed, it will output:
>> > x86-64-conda-linux-gnu-cc: xxxxxx.dispatch.c
>>
>> What's more interesting is that: after I changed the file
>> loops_arithm_fp.dispatch.c.src, and then rebuilt, the change to
>> loops_utils.h.src applied, with the screen full of "??????".
>>
>> I tested it for many times that each time I modify loops_utils.h.src, and
>> the change doesn't apply after re-building; while after I
>> modify loops_arithm_fp.dispatch.c.src, the change to loops_utils.h.src
>> starts to apply.
>>
>> It seems to be related to how build system detects the change, I guuess.
>> Can someone explain why this will happen or point out what I 've missed?
>>
>
> I don't think you've missed anything, that's a bug in one of the setup.py
> files. The build system (distutils + numpy.distutils) is bad at
> automatically figuring out what is used, so sometimes it needs an explicit
> hint with `depends=['some_header.h.src']` - it looks like that is missing
> here.
>
> Cheers,
> Ralf
>
> _______________________________________________
> NumPy-Discussion mailing list -- numpy-discussion@python.org
> To unsubscribe send an email to numpy-discussion-le...@python.org
> https://mail.python.org/mailman3/lists/numpy-discussion.python.org/
> Member address: 27rabbi...@gmail.com
>
_______________________________________________
NumPy-Discussion mailing list -- numpy-discussion@python.org
To unsubscribe send an email to numpy-discussion-le...@python.org
https://mail.python.org/mailman3/lists/numpy-discussion.python.org/
Member address: arch...@mail-archive.com
