C++ Team Blog
The latest in C++, Visual Studio, VS Code, and vcpkg from the MSFT C++ team
Latest posts
MSVC C++23: constexpr cmath with LLVM Libc
Proposal P0533R9 made numerous math functions in the standard library compile-time evaluable in C++23. Implementing the feature required a good bit of time and effort, but MSVC is preparing its experimental implementation for the 14.52 build tools (compiler version 19.52)! We are still refining the feature, so expect the dust to settle only when this has shipped for production. The feature is enabled with a combination of the or later and compiler options. It is initially shipping as experimental and off by default because our implementation is powered by a new math library at compile-time and runtime, which...
MSVC Build Tools Preview updates – September 2026
The MSVC Build Tools Preview is updated regularly with the latest features and fixes from the MSVC development team. This post covers updates from the past month, currently targeting the v14.52 release. This encompasses changes across the compiler frontend, backend, linker, standard library, and related tools. Although you can acquire the MSVC Build Tools Preview through either the Visual Studio 2026 Stable Channel or Insiders Channel, Insiders gets MSVC Preview updates more quickly (roughly weekly). To check whether it is installed, make sure one or both of these components are selected in the Visual Studio In...
Clearer Build Optimization Results with GitHub Copilot
We know that slow builds are a consistent theme in feedback from C++ developers. Your feedback helped us to shape GitHub Copilot build performance for Windows, an agent that can trace your build, find bottlenecks, apply optimizations, and measure the result. When using the agent, the clearest outcome is a straightforward win. The agent changes your project, rebuilds it, and shows how your build is made faster. Sometimes, a change may make a clean rebuild slightly slower while improving the incremental builds you run throughout the day. At other times, we also observed that optimizations may help without reachi...
MSVC Build Tools Preview updates – August 2026
Try the latest updates to MSVC Build Tools Preview
What’s New in vcpkg (Jul 2026)
These updates include major SBOM improvements in vcpkg-tool, 302 updated ports including multiple major library upgrades, and other minor improvements and bug fixes.
Pure Virtual C++ 2026 Is a Wrap
Pure Virtual C++ 2026 is a wrap. Every featured and on-demand session is now available on YouTube — catch up on C++/Rust interop, AI-driven tooling, build performance, and more.
Pure Virtual C++ 2026 Is Now Live!
Pure Virtual C++ 2026 is streaming now — watch five featured sessions live with Q&A, plus a full on-demand playlist, all free.
C++ Dependencies Without the Headache: vcpkg + Copilot CLI
At Pure Virtual C++ 2026, we build a C++ console app from an empty folder using CMake, MSVC, and GitHub Copilot CLI. This walkthrough shows a practical prompt sequence for dependency selection, reproducible builds, and controlled updates.
Pure Virtual C++ 2026 Is Tomorrow and On-Demand Sessions Are Now Available
The on-demand sessions for Pure Virtual C++ 2026 are available now on YouTube. Watch seven talks on SPGO, vcpkg + Copilot CLI, CMake Tools, PackageReference, MSVC upgrades, and C++23/26 status — then join us live tomorrow.
