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GCC 15.1: A Sneak Peek at C++26 Features

2025-04-25

GCC 15.1, expected in April or May 2025, boasts numerous C++ improvements. Key highlights include C++26 features like pack indexing, attributes for structured bindings, enhanced support for `=delete` functions, and more. The release also addresses numerous bug fixes, improves module support, and offers compile-time speed enhancements. Other notable additions are constexpr placement new, fixes for range-based for loops, earlier diagnosis of qualified lookup failures, and new warning options. GCC 15.1 promises significant efficiency gains and enhanced capabilities for C++ developers.

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GCC 15: Six Major Improvements to Compiler Diagnostics

2025-04-10

A Red Hat engineer details six significant improvements to compiler diagnostics in GCC 15, aimed at enhancing usability. These include: prettier visualizations of execution paths using ASCII art and warning emojis; improved presentation of C++ template errors with nested structures for better readability; simultaneous output of text and SARIF diagnostic formats; a smoother transition to C23 with improved error messages highlighting C23 compatibility issues; a revamped color scheme using color to highlight differences in the source code; and the introduction of libgdiagnostics, a shared library making GCC's diagnostic functionality accessible to other projects. These improvements promise a significant boost to the developer experience with GCC.