BUG: Avoid compilation error of wrapper file generated with SWIG >= 4.4 (#30128) - #30130
Merged
charris merged 1 commit intoNov 3, 2025
Merged
charris merged 1 commit into
charris merged 1 commit into
Conversation
Copy link
Copy Markdown
Member
Sorry, something went wrong.
….4 (numpy#30128) The `import_array` macro, which is defined in the file `numpy/core/code_generators/generate_numpy_api.py`, is intended for use inside an internal SWIG function that is called in the generated C wrapper file. This macro contains a return statement whose argument must match the function definition. Until version 4.3 of SWIG, the aforementioned function returned a `void*` value. However, in version 4.4, the return value was changed to `int`. This causes compilation of code using import_array() to fail with the following error message: `returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion].` This commit resolves the issue by returning either `NULL` or `0`, depending on the SWIG version being used (< 3.4 or >= 3.4, respectively). This change has been successfully tested against SWIG versions 4.3 and 4.4. Closes: numpy#30122
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Backport of #30128.
The import_array macro, which is defined in the file numpy/core/code_generators/generate_numpy_api.py, is intended for use inside an internal SWIG function that is called in the generated C wrapper file. This macro contains a return statement whose argument must match the function definition.
Until version 4.3 of SWIG, the aforementioned function returned a void* value. However, in version 4.4, the return value was changed to int. This causes compilation of code using import_array() to fail with the following error message: returning 'void *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion].
This commit resolves the issue by returning either NULL or 0, depending on the SWIG version being used (< 3.4 or >= 3.4, respectively). This change has been successfully tested against SWIG versions 4.3 and 4.4.
Closes: #30122