Hello,
We have a custom and unusual build environment that is making things a bit
difficult to transition from the old Setuptools based build process to Meson.
I'm currently blocked at the CPU feature set detection:
```
[tasks] Build command: call vcvarsall amd64 && cd /d "[...]\numpy" && pip
install -e . --no-build-isolation
**********************************************************************
** Visual Studio 2022 Developer Command Prompt v17.9.6
** Copyright (c) 2022 Microsoft Corporation
**********************************************************************
[vcvarsall.bat] Environment initialized for: 'x64'
Defaulting to user installation because normal site-packages is not writeable
Obtaining file:///[...]/numpy
Checking if build backend supports build_editable: started
Checking if build backend supports build_editable: finished with status 'done'
Preparing editable metadata (pyproject.toml): started
Preparing editable metadata (pyproject.toml): finished with status 'error'
error: subprocess-exited-with-error
× Preparing editable metadata (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [24 lines of output]
+ [...]\meson\Scripts\meson.exe setup [...]\numpy [...]\numpy\build\cp311
-Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md
--native-file=[...]\numpy\build\cp311\meson-python-native-file.ini
The Meson build system
Version: 1.4.0
Source dir: [...]\numpy
Build dir: [...]\numpy\build\cp311
Build type: native build
Project name: NumPy
Project version: 1.26.5
C compiler for the host machine: cl (msvc 19.39.33523 "Microsoft (R)
C/C++ Optimizing Compiler Version 19.39.33523 for x64")
C linker for the host machine: link link 14.39.33523.0
C++ compiler for the host machine: cl (msvc 19.39.33523 "Microsoft (R)
C/C++ Optimizing Compiler Version 19.39.33523 for x64")
C++ linker for the host machine: link link 14.39.33523.0
Cython compiler for the host machine:
[...]\python-3.11\cython\bin\cython.bat (cython 3.0.9)
Host machine cpu family: x86_64
Host machine cpu: x86_64
Program python found: YES (C:\Program Files\Python311\python.exe)
Run-time dependency python found: YES 3.11
Has header "Python.h" with dependency python: YES
Compiler for C supports arguments -fno-strict-aliasing: NO
Message: [...]\numpy
..\..\meson_cpu\x86\meson.build:3:15: ERROR: Module "features" does not
exist
A full log can be found at
[...]\numpy\build\cp311\meson-logs\meson-log.txt
[end of output]
note: This error originates from a subprocess, and is likely not a problem
with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
14:27:24 ERROR BuildError: The custom build system failed.
```
So the build fails whilst trying to import the "features" module here:
https://github.com/numpy/numpy/blob/main/meson_cpu/x86/meson.build#L2C1-L3C1
Where is that module meant to be located?
Cheers,
Thomas
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