Build dependencies should be automatically generated

[smontanaro]

Bug report

Bug description:

Python's build dependencies are currently maintained semi-manually. This can create the occasional problem when building based on a previous build. The usual solution is either make clean, make distclean or git clean -fdx.

GCC and its related compilers have long supported dependency generation using the -M and related flags. Python should try to use this feature if possible.

(PR incoming...)

CPython versions tested on:

CPython main branch

Operating systems tested on:

Linux, macOS

Linked PRs

• gh-115992: Generate build dependencies using gcc facility #115993

[smontanaro]

Thanks @Eclips4 for the change in type. I looked at the "feature" tag, but it seemed to me to focus on changes to the language or addition of new modules/packages. Maybe I just misunderstood what I was reading.

[Eclips4]

Thanks @Eclips4 for the change in type. I looked at the "feature" tag, but it seemed to me to focus on changes to the language or addition of new modules/packages. Maybe I just misunderstood what I was reading.

It is not limited to new modules / packages :) The type-feature label refers to enhancements, and your issue definitely seems like an enhancement.