schism-dev/schism
Feb 2025 – Aug 2025
5 Months active
Languages Used
CMakeCmakeDockerfileFortranShellMakefile
Technical Skills
Build System ConfigurationBuild SystemsCC/C++CI/CDCode Maintenance
Carsten Lemmen
PROFILE
Carsten Lemmen
Carsten Lemmen contributed to the schism-dev/schism repository by engineering robust build system enhancements and cross-platform integration features over five months. He implemented reproducible development environments using CMake and Conda, streamlined Intel MPI and NetCDF configuration for Levante, and introduced CI/CD automation to stabilize releases. Carsten addressed platform-specific build issues by refining Makefile logic for lib64 compatibility and improved portability for FABM integration through conditional compilation and include path alignment. His work with Fortran and C/C++ focused on reducing build failures, enhancing deployment reliability, and supporting high-performance computing workflows, demonstrating a deep understanding of complex build and integration challenges.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
8Total
Bugs
3
Commits
8
Features
3
Lines of code
183
Activity Months5
Your Network
25 people
Work History
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 highlights: Build-system enhancements focused on Intel toolchain readiness and GOTM integration. Fixed GOTM build discovery to correctly locate and include GOTM sources in CMake. Introduced a strand@hereon specific CMake configuration to streamline builds for the Intel toolchain, including compiler paths, naming conventions, release flags for Fortran and C, and NetCDF integration. These changes improve build reliability, cross-environment portability, and CI stability, accelerating feature delivery and reducing integration risk.
2 Commits • 1 Features
Aug 1, 2025August 2025 highlights: Build-system enhancements focused on Intel toolchain readiness and GOTM integration. Fixed GOTM build discovery to correctly locate and include GOTM sources in CMake. Introduced a strand@hereon specific CMake configuration to streamline builds for the Intel toolchain, including compiler paths, naming conventions, release flags for Fortran and C, and NetCDF integration. These changes improve build reliability, cross-environment portability, and CI stability, accelerating feature delivery and reducing integration risk.
August 2025
July 2025
1 Commits
Jul 1, 2025July 2025 — Schism: Stabilized FABM masking by introducing a macro guard that activates FABM masking only when _FABM_MASK_TYPE_ is defined, resolving a long-standing undefined _HAS_MASK_ macro error. This reduces compile-time failures and improves cross-configuration builds for schism.
July 2025
1 Commits
Jul 1, 2025July 2025 — Schism: Stabilized FABM masking by introducing a macro guard that activates FABM masking only when _FABM_MASK_TYPE_ is defined, resolving a long-standing undefined _HAS_MASK_ macro error. This reduces compile-time failures and improves cross-configuration builds for schism.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly work summary for schism-dev/schism. Focused on portability and integration improvements for FABM environments. Delivered SCHISM-FABM portability and include path alignment feature, with conditional compilation of HAS_MASK and corrected placement of the SCHISM driver file within include directories. No major bugs fixed this month. The changes reduce build failures, improve cross-environment compatibility, and accelerate adoption for legacy FABM setups, enhancing deployment reliability and maintainability. Technologies demonstrated include C/C++ conditional compilation, include path management, cross-platform portability strategies, and version-controlled change tracing.
1 Commits • 1 Features
May 1, 2025May 2025 monthly work summary for schism-dev/schism. Focused on portability and integration improvements for FABM environments. Delivered SCHISM-FABM portability and include path alignment feature, with conditional compilation of HAS_MASK and corrected placement of the SCHISM driver file within include directories. No major bugs fixed this month. The changes reduce build failures, improve cross-environment compatibility, and accelerate adoption for legacy FABM setups, enhancing deployment reliability and maintainability. Technologies demonstrated include C/C++ conditional compilation, include path management, cross-platform portability strategies, and version-controlled change tracing.
May 2025
April 2025
1 Commits
Apr 1, 2025Delivered a targeted portability fix to ensure FABM library linkage on lib64-based systems, improving cross-platform build reliability for schism. The change stabilizes builds where FABM is installed in a lib64 directory, reducing install-time errors and streamlining deployment across Linux distributions.
April 2025
1 Commits
Apr 1, 2025Delivered a targeted portability fix to ensure FABM library linkage on lib64-based systems, improving cross-platform build reliability for schism. The change stabilizes builds where FABM is installed in a lib64 directory, reducing install-time errors and streamlining deployment across Linux distributions.
February 2025
3 Commits • 1 Features
Feb 1, 2025February 2025 (2025-02) – Schism dev team delivered foundational Development Environment and Build Configuration enhancements for the schism-dev/schism repository, enabling reproducible local builds, Levante-ready MPI integration, and CI/CD alignment. These improvements reduce onboarding time, stabilize developer workflows, and improve release reliability. Key infrastructure work included Conda-based local build support with CMake, Intel MPI/Levante-specific config, standardized NetCDF discovery, and minor logging accuracy improvements.
3 Commits • 1 Features
Feb 1, 2025February 2025 (2025-02) – Schism dev team delivered foundational Development Environment and Build Configuration enhancements for the schism-dev/schism repository, enabling reproducible local builds, Levante-ready MPI integration, and CI/CD alignment. These improvements reduce onboarding time, stabilize developer workflows, and improve release reliability. Key infrastructure work included Conda-based local build support with CMake, Intel MPI/Levante-specific config, standardized NetCDF discovery, and minor logging accuracy improvements.
February 2025
Activity
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Quality Metrics
Correctness82.6%
Maintainability82.6%
Architecture80.0%
Performance72.6%
AI Usage20.0%
Skills & Technologies
Programming Languages
CMakeCmakeDockerfileFortranMakefileShell
Technical Skills
Build System ConfigurationBuild SystemsCC/C++CI/CDCMakeCode MaintenanceConda EnvironmentsFortranFortran DevelopmentHigh-Performance ComputingMPIModel Integration
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