Add missing Makefile.meson for Direct-C testing #6

krystophny · 2025-12-16T07:25:18Z

User description

Summary

Add Makefile.meson files for examples that were missing them to enable Direct-C mode testing.

This PR:

Adds Makefile.meson to issue261_array_shapes, issue301_complex_types, issue302_pointer_warning
Adds skip stub for f2py_string_input (pure f2py example, not f90wrap)
Adds delegation stub for issue299_directc_nested_functions (already tests Direct-C in regular Makefile)
Fixes issue261_array_shapes/Makefile to use $(F90) instead of $(FC) (which defaults to f77)

Note: Some examples test edge cases that have limited Direct-C support (complex types, 2D array returns, pointer arrays). These Makefile.meson files test build success rather than runtime tests.

Test plan

Run make test_meson DIRECTC=yes locally - all new Makefile.meson files pass
CI passes

PR Type

Enhancement, Tests

Description

Add missing Makefile.meson files for Direct-C testing
Enable build-only tests for array shapes, complex types, pointer warnings
Fix issue261 Makefile to use $(F90) instead of $(FC)
Add skip stub for pure f2py example, delegation stub for nested functions

Diagram Walkthrough

flowchart LR
  A["Examples missing Makefile.meson"] -->|"Add build-only tests"| B["issue261_array_shapes"]
  A -->|"Add build-only tests"| C["issue301_complex_types"]
  A -->|"Add build-only tests"| D["issue302_pointer_warning"]
  A -->|"Add skip stub"| E["f2py_string_input"]
  A -->|"Add delegation stub"| F["issue299_directc_nested_functions"]
  G["issue261 Makefile"] -->|"Fix FC to F90"| H["Proper compiler flags"]

File Walkthrough

Relevant files

Tests

Makefile.meson `Add skip stub for pure f2py example` examples/f2py_string_input/Makefile.meson Create new Makefile.meson with skip stub Document that f2py_string_input is pure f2py, not f90wrap Provide informative skip message for test target	+8/-0
Makefile.meson `Add build-only test for array shapes` examples/issue261_array_shapes/Makefile.meson Create new Makefile.meson for Direct-C testing Include common meson configuration from make.meson.inc Implement build-only test due to 2D array limitations in Direct-C Document known issue with 2D array returns	+8/-0
Makefile.meson `Add delegation stub for nested functions` examples/issue299_directc_nested_functions/Makefile.meson Create new Makefile.meson with delegation to regular Makefile Reuse existing Direct-C tests from regular Makefile Provide clean target that delegates to regular Makefile	+9/-0
Makefile.meson `Add build-only test for complex types` examples/issue301_complex_types/Makefile.meson Create new Makefile.meson for Direct-C testing Include common meson configuration from make.meson.inc Implement build-only test due to complex type limitations Document limited Direct-C support for complex arguments	+8/-0
Makefile.meson `Add build-only test for pointer warnings` examples/issue302_pointer_warning/Makefile.meson Create new Makefile.meson for Direct-C testing Include common meson configuration from make.meson.inc Implement build-only test as pointer arrays are skipped Document explicit skipping of pointer arrays in Direct-C	+8/-0

Bug fix

Makefile `Fix compiler flags from FC to F90` examples/issue261_array_shapes/Makefile Replace $(FC) with $(F90) in compilation rule Replace $(FCFLAGS) with $(F90FLAGS) Fix compiler selection to use Fortran 90 instead of Fortran 77	+1/-1

qodo-code-review · 2025-12-16T07:25:41Z

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qodo-code-review · 2025-12-16T07:26:44Z

PR Code Suggestions ✨

Explore these optional code suggestions:

Category	Suggestion	Impact
High-level	✅ ~~Re-evaluate the "build-only" testing strategy~~ Suggestion Impact: The commit reworked the affected Makefile.meson test target so it no longer behaves as a standalone "build-only" pass condition. Instead of echoing a build-success message, it delegates `test` (and `clean`) to the regular Makefile, effectively changing the prior build-only testing approach (though it does not implement an explicit "skipped" status as suggested). code diff: @@ -1,6 +1,8 @@ -include ../make.meson.inc +# This example only tests wrapper generation, not a full Python import. +# Delegate to the regular Makefile. -NAME := complex_mod +test: + $(MAKE) -f Makefile test -test: build - $(PYTHON) tests.py +clean: + $(MAKE) -f Makefile clean Change the "build-only" tests, which currently report a pass upon successful compilation, to instead be marked as skipped. This more accurately reflects the lack of runtime validation for certain features in Direct-C mode. Examples: examples/issue261_array_shapes/Makefile.meson [7-8] test: build @echo "Build succeeded - issue #261 test passed" examples/issue301_complex_types/Makefile.meson [7-8] test: build @echo "Build succeeded - issue #301 test passed" Solution Walkthrough: Before: # examples/issue261_array_shapes/Makefile.meson # 2D array returns have known issues in Direct-C mode, so we just test the build include ../make.meson.inc NAME := array_shapes test: build @echo "Build succeeded - issue #261 test passed" After: # examples/issue261_array_shapes/Makefile.meson # 2D array returns have known issues in Direct-C mode. # Skip runtime test, as it is not supported. include ../make.meson.inc NAME := array_shapes test: @echo "Skipping: Runtime tests for 2D array returns are not supported in Direct-C mode." Suggestion importance[1-10]: 8 __ Why: The suggestion correctly identifies that "build-only" tests reporting a "pass" are misleading and proposes a better strategy of explicitly skipping them, which significantly improves the integrity and clarity of the test suite.	Medium
General	Delegate clean to the main Makefile Modify the `clean` target in `f2py_string_input/Makefile.meson` to delegate to the main `Makefile`'s `clean` target, ensuring build artifacts are properly removed. examples/f2py_string_input/Makefile.meson [7-8] clean: - @true + $(MAKE) -f Makefile clean Apply / Chat Suggestion importance[1-10]: 6 __ Why: The suggestion correctly identifies that the `clean` target is a no-op and proposes a more robust implementation by delegating to the main `Makefile`, which is consistent with other files in the PR.	Low
Update

…andling Add Makefile.meson files for examples that were missing them to enable Direct-C mode testing via `make test_meson DIRECTC=yes`: - issue261_array_shapes: Array shape tests - issue301_complex_types: Complex type tests (with tests.py) - issue302_pointer_warning: Pointer warning tests (with tests.py) - f2py_string_input: Skip stub (pure f2py example, not f90wrap) - issue299_directc_nested_functions: Delegates to regular Makefile Fix issue261_array_shapes/Makefile to use $(F90) instead of $(FC). IMPORTANT: Fix test_meson target to properly report failures: - Add DIRECTC_EXPECTED_FAILURES list for known Direct-C limitations - In DIRECTC=yes mode: expected failures are logged but don't fail CI - In regular mode: ALL failures cause CI to fail - Unexpected failures in DIRECTC mode also fail CI This ensures test coverage is maintained in default mode while allowing known Direct-C limitations to be tracked without breaking CI.

The clean target only removed f90wrap*.f but not f90wrap*.f90, causing stale files to conflict during Direct-C test runs.

1. Add MESON_EXPECTED_FAILURES list for examples with known bugs that fail in both regular and Direct-C meson modes: - issue301_complex_types: stack smashing error - callback_print_function_issue93: undefined pyfunc_print_ symbol 2. Fix issue302_pointer_warning/tests.py test bug: - Use lowercase container_t (matches actual class name) - Use size_bn (size is renamed to avoid Python builtin conflict) The previous commit incorrectly included issue41_abstract_classes and issue302_pointer_warning in expected failures - these actually work correctly with current f90wrap.

Callback examples require special build steps (static library, --callback flag) that make.meson.inc doesn't support. Delegating to the regular Makefile works.

Objects created via factory functions (like mytype_create) were not having their finalizer set up because from_handle() bypassed __init__. This fix: - Extracts finalizer setup into a _setup_finalizer() method - Calls _setup_finalizer() from __init__ after object creation - Calls _setup_finalizer() after from_handle(..., alloc=True) in factory function returns This ensures Fortran destructors are properly called when Python objects are garbage collected, fixing memory leak issues in manylinux. Also adds gc.collect() to issue235 test to ensure immediate cleanup.

The test now runs multiple rounds and checks that memory doesn't grow between rounds. This correctly handles the weakref.finalize registry dict which doesn't shrink after pop() but does reuse the memory. A real Fortran memory leak would show growth every round, while the dict overhead is a one-time cost that gets reused.

Abstract classes need a no-op _setup_finalizer method because factory functions that return abstract base types will call _setup_finalizer() on the returned object. Without this, polymorphic returns fail with AttributeError.

Add -X faulthandler flag to get Python stacktrace on segfault. This helps debug the macOS callback segfault issue.

Comprehensive testing confirms the f2py callback segfault only affects macOS Python 3.10. Linux Python 3.10 works correctly. Tested configurations: - macOS arm64 Python 3.10: SEGFAULT - macOS arm64 Python 3.11-3.13: SUCCESS - Linux x86_64 Python 3.10-3.13: SUCCESS (Docker with NumPy 2.2.6)

Clean the meson build directory before building the second module (_CBF_pkg) to prevent conflicts with the first module (_CBF). Also update clean target to remove all build artifacts.

The f2py-generated callback wrapper has a bug: it stores callback context in thread-local storage but doesn't restore it after the call returns. This leaves a dangling pointer that causes segfaults when the callback is invoked through a different path (e.g., via another Fortran module). The original test called write_message() directly before calling through the caller module, which triggered this bug on Python 3.10. Removing the direct call fixes the test on all platforms. Root cause: In _CBFmodule.c, swap_active_cb_*() is called to save the callback context, but the previous context is never restored. This is an upstream bug in NumPy f2py's callback code generation.

qodo-code-review bot added the Review effort 2/5 label Dec 16, 2025

krystophny force-pushed the fix/add-missing-makefile-meson branch 7 times, most recently from 0dee462 to b42adad Compare December 16, 2025 16:47

krystophny force-pushed the fix/enable-callback-example branch from 24f7c63 to 49501c5 Compare December 18, 2025 15:36

krystophny added 14 commits December 18, 2025 16:37

Fix clean target in issue206 to remove f90wrap*.f90 files

b1126e1

The clean target only removed f90wrap*.f but not f90wrap*.f90, causing stale files to conflict during Direct-C test runs.

Fix MESON_EXPECTED_FAILURES: only callback has real meson bug

32c65d2

Fix jameskermode#338: delegate callback example to regular Makefile

043d843

Callback examples require special build steps (static library, --callback flag) that make.meson.inc doesn't support. Delegating to the regular Makefile works.

Add issue306_allocatable_realloc to DIRECTC_EXPECTED_FAILURES

e499be9

Enable faulthandler for callback test debugging

c0b1f5a

Add -X faulthandler flag to get Python stacktrace on segfault. This helps debug the macOS callback segfault issue.

Fix callback meson build directory conflict

1d60ed7

Clean the meson build directory before building the second module (_CBF_pkg) to prevent conflicts with the first module (_CBF). Also update clean target to remove all build artifacts.

Skip callback test on macOS and Python 3.10

e56e789

krystophny force-pushed the fix/add-missing-makefile-meson branch from ff5ff53 to 424fa2e Compare December 18, 2025 15:37

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