Changelog

[Unreleased]

--build flag: One-step wrap and build for extension modules. Use f90wrap --build -m module source.f90. Automatically uses Direct-C mode. For f2py or complex builds, continue using Makefiles.
Direct-C mode: Alternative to f2py for generating Python extension modules. Use --direct-c flag to generate C code that directly calls f90wrap Fortran helpers via the Python C API, eliminating the f2py dependency.

More reliable cleanup: Switched from __del__ to weakref.finalize for derived type destructors. This fixes cleanup in reference cycles, improves thread-safety, and provides deterministic finalization order. Recommended Python best practice since 3.4.

f90wrap/build.py: Build orchestration module with clean API for both CLI and programmatic use
f90wrap/setuptools_ext.py: Setuptools integration with F90WrapExtension and build_ext_cmdclass
f90wrap/directc.py: ISO C interoperability analysis and procedure classification
f90wrap/directc_cgen/: C code generator package for Python C API wrappers
f90wrap/numpy_utils.py: NumPy C API type mapping utilities
f90wrap/runtime.py: Runtime support for Direct-C array handling
CLI: --build and --clean-build flags for automated compilation
CLI: --direct-c flag generates _module.c files alongside standard Fortran wrappers

Respects standard environment variables: FC, F90, CC, FFLAGS, CFLAGS, LDFLAGS, F2PY, F2PY_F90WRAP
Auto-detects Python and NumPy include paths (overridable via PYTHON_INCLUDES, NUMPY_INCLUDES)
Platform-specific defaults (Darwin bundle vs Linux shared library)
Compiles f90wrap-generated wrappers and links with specified source files
Programmatic API for Python package builds (pyproject.toml/setup.py integration)
For complex builds with external libraries, continue using Makefiles or build systems