Changelog¶

All notable changes to POGS are documented here.

[Unreleased] - Version 0.4.0¶

Added¶

Build System: - CMake build system - Modern, cross-platform build replacing Makefiles - Package configuration for find_package(POGS) support - Installation support with proper headers and libraries

C++20 Features: - Full migration to C++20 standard - Modern type system with enum classes (FunctionType, ConeType, Status, Ord) - RAII-based memory management (ADMMState class using std::vector) - Designated initializers for configuration (SolverConfig) - New public API headers in include/pogs/: - types.hpp - Modern type definitions - config.hpp - Solver configuration - c/pogs_c.h - C interface

Optimization Features: - Cone form support with full cone projections (Zero, NonNeg, NonPos, SOC, SDP, Exponential) - C interface for cone form problems (PogsConeD, PogsConeF) - Python/CVXPY integration for high-level optimization modeling - Anderson acceleration for faster convergence - Comprehensive test suite (132 assertions across 35 test cases)

Documentation: - Modern MkDocs Material documentation site - Comprehensive user guides and API reference - Practical examples (Lasso, Logistic Regression, SDP) - Developer documentation and contribution guide

Changed¶

Build system: Migrated from Makefiles to CMake
C++ standard: Upgraded from C++11 to C++20
Memory management: Foundation for RAII patterns with ADMMState class
Code quality: Fixed C++17/C++20 compatibility issues (removed std::unary_function)
Project structure: Modern header organization
Documentation: Migrated to MkDocs Material with search and mobile support

Deprecated¶

Old Makefile-based build system (use CMake instead)
Graph form interface (use cone form for new projects)

Removed¶

MATLAB Interface: - Removed pedagogical MATLAB implementation (unmaintained) - Migration path: Use Python with CVXPY for high-level modeling - Alternative: Use C/C++ interface for performance-critical applications

R Interface: - Removed due to lack of maintenance

Old Documentation: - Removed outdated gh-pages Jekyll documentation - Replaced with modern MkDocs Material site

Migration Notes¶

For MATLAB Users: - Migrate to Python with CVXPY (see CVXPY Integration) - Python provides similar high-level modeling with better ecosystem - Easy installation: pip install cvxpy

For Build System Users: - Replace make cpu with cmake --build build - See Installation Guide for details

[0.3.0] - Previous Release¶

Initial release with: - Graph form solver - MATLAB interface - Basic C++ implementation - CPU and GPU backends - Examples and documentation

Version History¶

0.4.0 (Unreleased): C++20 modernization, CMake, MkDocs documentation
0.3.0 (2016): Initial public release
0.2.0 (2015): Internal development
0.1.0 (2014): Research prototype

Release Process¶

POGS follows Semantic Versioning:

Major (x.0.0): Breaking API changes
Minor (0.x.0): New features, backward compatible
Patch (0.0.x): Bug fixes, backward compatible