CppCon 2026

Modern C++ development has embraced package managers like Conan and vcpkg for dependency management, gaining reproducibility and productivity. However, a significant weak point remains: the build toolchain. Unlike standard dependencies, the disparate set of tools comprising the compiler, linker, standard libraries, and OS-specific headers often remains outside this managed ecosystem. This gap leads to frequent complications, where misaligned versions between local environments and CI cause build errors and subtle ABI incompatibilities.

The operational cost of maintaining these toolchains is high. Updating a compiler version often necessitates the creation and deployment of new VM images or manual infrastructure updates, a process that can be even more complex if specialized environments like CUDA are involved. These hurdles directly impact engineering productivity and organizational alignment. Docker is a popular solution to isolate toolchains, but it does not support all the mainstream platforms.

This talk proposes a shift in perspective: treating the build toolchain as just another dependency. We will explore how leveraging toolchain isolation allows developers to express specific toolchain versions within their project manifests—using cross-platform tools like Conan and vcpkg to ensure strict repeatability across local developer environments and CI machines.By automating the fetching and configuration of the entire compiler suite, teams can ensure perfect alignment across all environments, simplify the upgrade path, and ultimately boost engineering velocity.