Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Document how to find NumPy with CMake on cross-compiled builds #2321

Open
wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Document how to find NumPy with CMake on cross-compiled builds #2321

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
1ec2a31
Document how to find NumPy with CMake on cross-compiled builds
traversaro Oct 1, 2024
9d4894a
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Oct 1, 2024
9bc3bc4
Update docs/maintainer/knowledge_base.md
traversaro Oct 2, 2024
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
15 changes: 15 additions & 0 deletions docs/maintainer/knowledge_base.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -559,6 +559,21 @@ fi
There are more variations of this approach in the wild. So this is not meant to be exhaustive,
but merely to provide a starting point with some guidelines. Please look at [other recipes for more examples](https:/search?q=org%3Aconda-forge+path%3Arecipe%2Fmeta.yaml+%22%5Bbuild_platform+%21%3D+target_platform%5D%22&type=code).

#### Finding NumPy in cross-compiled Python packages using CMake

If you are building a Python extension via CMake with NumPy and you want it work in cross-compilation, you need to prepend to the CMake invocation in your build script the following lines:

```sh
Python_INCLUDE_DIR="$(python -c 'import sysconfig; print(sysconfig.get_path("include"))')"
Python_NumPy_INCLUDE_DIR="$(python -c 'import numpy;print(numpy.get_include())')"
CMAKE_ARGS="${CMAKE_ARGS} -DPython_EXECUTABLE:PATH=${PYTHON}"
CMAKE_ARGS="${CMAKE_ARGS} -DPython_INCLUDE_DIR:PATH=${Python_INCLUDE_DIR}"
CMAKE_ARGS="${CMAKE_ARGS} -DPython_NumPy_INCLUDE_DIR=${Python_NumPy_INCLUDE_DIR}"
CMAKE_ARGS="${CMAKE_ARGS} -DPython3_EXECUTABLE:PATH=${PYTHON}"
CMAKE_ARGS="${CMAKE_ARGS} -DPython3_INCLUDE_DIR:PATH=${Python_INCLUDE_DIR}"
CMAKE_ARGS="${CMAKE_ARGS} -DPython3_NumPy_INCLUDE_DIR=${Python_NumPy_INCLUDE_DIR}"
```

<a id="python-cross-compilation"></a>

<a id="details-about-cross-compiled-python-packages"></a>
Expand Down