c-cpp-compilers

What problem does it solve?

Modern C and C++ projects require careful selection of compiler flags, build modes, sanitizer and static analysis configurations, and link-time optimizations to be correct, fast, and debuggable. Many developers struggle to interpret cryptic diagnostics, choose between GCC and Clang behaviors, reproduce sanitizer reports, or configure PGO and LTO correctly for CI and release builds. This Skill centralizes practical guidance, triage steps, and repeatable CMake and toolchain recommendations to reduce time spent debugging builds and runtime UB.

Core Features & Use Cases

• Practical guidance on compiler selection and flag tradeoffs including optimization levels, size vs speed decisions, and hardening flags.
• Sanitizer and runtime triage: recommended sanitizer combinations, runtime options, interpretation of ASan/UBSan/TSan reports, and CMake integration for testing.
• Static analysis and linting workflows: how to generate a compilation database, run clang-tidy, cppcheck, scan-build, and GCC's analyzer with CI examples and suppression patterns.
• Build optimization workflows: step-by-step LTO and PGO recipes for GCC and Clang, and advice on ThinLTO, linkers, and archive handling.
• CMake and modules guidance: snippets and patterns for sanitizer toggles, export of compile commands, and building C++20/23 modules with modern CMake.
• Use case example: triage an AddressSanitizer report from CI, produce a minimal reproducer, recommend build flags to reproduce locally, and propose a CI sanitizer job configuration.

Quick Start

Analyze my project's build and provide concrete GCC or Clang flag recommendations, sanitizer and static analysis settings, and CMake snippets to reproduce and fix any reported issues.