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 <[email protected]> 于2022年11月2日周三 17:13写道： > > > On Wed, Nov 2, 2022 at 9:30 AM 腾刘 <[email protected]> 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 -- [email protected] > To unsubscribe send an email to [email protected] > https://mail.python.org/mailman3/lists/numpy-discussion.python.org/ > Member address: [email protected] >
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