fckitlib

What it is and what it does

FCKit is a Fortran toolkit designed to simplify interoperability between Fortran and C/C++ codebases. It includes a unit testing framework (fctest) that uses C preprocessor macros to streamline test writing, bundling tests into Fortran modules and auto-generating a main program via Python and CMake. The package also wraps useful algorithms from ecKit and provides Fortran modules for MPI and logging in mixed-language applications.

The package is distributed as pre-built wheels for multiple Python versions and platforms (macOS and Linux), but its primary use is within CMake-driven Fortran build systems rather than as a standalone Python library. Installation involves medium friction due to compiled dependencies and platform-specific wheels. It is actively maintained and carries no known security vulnerabilities.

Use it for:

• Writing unit tests for Fortran code using preprocessor macros and CMake integration without manual boilerplate.
• Building mixed Fortran/C++ applications that need MPI communication and logging infrastructure.
• Wrapping ecKit algorithms in Fortran for numerical or scientific computing workflows.
• Offline deployment of Fortran projects by pre-downloading platform-specific wheels for air-gapped systems.

Worth the install?

AI-flagged interpretation of the facts on this page — verify before relying

Provides Fortran modules and a unit testing framework for building mixed-language applications that interoperate between Fortran and C/C++, wrapping algorithms from ecKit.

Yes, if you are building a Fortran project with CMake and need a lightweight unit testing framework or mixed-language interop support. No, if you are looking for a pure Python library—this is a Fortran toolkit distributed via PyPI for build-system convenience. License terms are unclear, so verify licensing before use in proprietary code.

Install

fckitlib on PyPI

pip install fckitlib

uv add fckitlib

poetry add fckitlib

Installing fckitlib

Before you install

Medium install friction due to compiled wheels across multiple Python versions and architectures (cp310–cp314, macOS arm64/x86_64, manylinux_2_28). Actively maintained with a recent release.

Quickstart

pip install fckitlib

In CMakeLists.txt:
ecbuild_add_option( FEATURE FCTEST  DEFAULT ${ENABLE_TESTS}
                    DESCRIPTION "Fortran Unit Testing Framework"
                    REQUIRED_PACKAGES "NAME fckit" )

Requires CMake and ecbuild build system integration; intended for Fortran projects, not standalone Python use.

Verify before relying

• Whether eckitlib (the sole runtime dependency) is a separate package or a bundled component.
• Exact license terms—license_treatment is 'unclear' and no SPDX identifier is present.
• Python version support—requires_python is unspecified despite wheels for cp310–cp314.

Package facts

Evidence: fckitlib-0.14.2.19-cp310-cp310-macosx_13_0_arm64.whl; fckitlib-0.14.2.19-cp310-cp310-macosx_13_0_x86_64.whl; fckitlib-0.14.2.19-cp310-cp310-manylinux_2_28_aarch64.whl; fckitlib-0.14.2.19-cp310-cp310-manylinux_2_28_x86_64.whl; fckitlib-0.14.2.19-cp311-cp311-macosx_13_0_arm64.whl; fckitlib-0.14.2.19-cp311-cp311-macosx_13_0_x86_64.whl; fckitlib-0.14.2.19-cp311-cp311-manylinux_2_28_aarch64.whl; fckitlib-0.14.2.19-cp311-cp311-manylinux_2_28_x86_64.whl; fckitlib-0.14.2.19-cp312-cp312-macosx_13_0_arm64.whl; fckitlib-0.14.2.19-cp312-cp312-macosx_13_0_x86_64.whl; fckitlib-0.14.2.19-cp312-cp312-manylinux_2_28_aarch64.whl; fckitlib-0.14.2.19-cp312-cp312-manylinux_2_28_x86_64.whl; fckitlib-0.14.2.19-cp313-cp313-macosx_13_0_arm64.whl; fckitlib-0.14.2.19-cp313-cp313-macosx_13_0_x86_64.whl; fckitlib-0.14.2.19-cp313-cp313-manylinux_2_28_aarch64.whl; fckitlib-0.14.2.19-cp313-cp313-manylinux_2_28_x86_64.whl; fckitlib-0.14.2.19-cp314-cp314-macosx_13_0_arm64.whl; fckitlib-0.14.2.19-cp314-cp314-macosx_13_0_x86_64.whl; fckitlib-0.14.2.19-cp314-cp314-manylinux_2_28_aarch64.whl; fckitlib-0.14.2.19-cp314-cp314-manylinux_2_28_x86_64.whl

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