Hey all

First time trying to build / test numpy main branch, so I'm probably doing something wrong.

I brought down main and everything built on the first try. However I'm getting test failures related to meson.

Specifically the tests in "python -m pytest numpy/core/tests/test_mem_policy.py" all give errors. The errors seem related to meson and visual studio:

> Visual Studio environment is needed to run Ninja. It is recommended to use Meson wrapper:
/Users/douglas.turnbull/ws/numpy/venv/bin/meson compile -C .

> ERROR: Could not detect Ninja v1.8.2 or newer

This is an m1 mac with Python 3.11.4. Scrolling up in meson_log.txt I see a linker error:

> ld: symbol(s) not found for architecture arm64

Included system information

Project version: undefined
C compiler for the host machine: cc (clang 14.0.3 "Apple clang version 14.0.3 (clang-1403.0.22.14.1)")
C linker for the host machine: cc ld64 857.1
Host machine cpu family: aarch64
Host machine cpu: aarch64

Snippet from meson log

Detecting Apple linker via: `cc -Wl,-v` -> 1
stderr:
@(#)PROGRAM:ld PROJECT:ld64-857.1
BUILD 23:13:29 May 7 2023
configured to support archs: armv6 armv7 armv7s arm64 arm64e arm64_32 i386 x86_64 x86_64h armv6m armv7k armv7m armv7em
Library search paths:
.
/opt/homebrew/lib
/usr/local/lib
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/lib
Framework search paths:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/System/Library/Frameworks/
Undefined symbols for architecture arm64:
"_main", referenced from:
implicit entry/start for main executable
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Seeing a note recommending gcc in the docs, I'm going to try using gcc rather than clang as next steps. But I wanted to share this issue if it is indeed one.

-Doug