Reliable, Fast and Safe Builds Damien co-founder, tipi.build @daminetreg / damien@tipi.build Antonio DevEx Engineer, EngFlow @TheGrizzlyDev / antonio@engflow.comA love ❤ letter to CMakeGiving CMake tackle first Memory Safety Arithmetic SafetySanitizers for C++ builds with CMake github.com/tipi-build/sanitizers-cmakeSanitizers for C++ builds AddressSanitizer (ASan) UndefinedBehaviorSanitizer (UBSsan) decent amount of CPU power Let's look at other build systemsLearning from other build-systemsParallelism How many independent targets can a build system run concurrently at most?Parallelism Level

Why is my build so slow? Sam Privett 12 Disclaimer: The views and opinions expressed in this presentation are solely those of the presenters and do not necessarily represent the views, positions, Visualizing Compilation IntroductionLines of Code ≈ Longer Build Times 8Lines of Code 📈 9Build Times 📈 10Build Times 📈 11Build Times 📈 12Build Times 📈 13Boiling Frog 14Developer Productivity 15 linker, etc) 18Visualization 19 - Interactive Trace Viewer - https://ui.perfetto.dev/ - Can build and run server locally as well - Chrome Event Tracing Format JSON - … and more!20 VisualizationClang

Fanchen Su, XOffsetDatastructure, CppCon 2024 41. Title • 1 Long Title: • Using Modern C++ to Build XOffsetDatastructure: A Zero-Encoding and Zero-Decoding High-Performance Serialization Library in Fanchen Su, XOffsetDatastructure, CppCon 2024 51. Title • 1 Long Title: • Using Modern C++ to Build XOffsetDatastructure: A Zero-Encoding and Zero-Decoding High-Performance Serialization Library in

● 15 years working on build systems and software process ● CMake developer ○ Designing and implementing features, performance improvements ○ Maintaining and improving build systems which use CMake Pushing forward modules support in other build systems ■ xmake ■ bazel 2Outline 1. What are compilation databases? 2. How do modules change the status quo? 3. Build databases 3Compilation Databases: Overview https://clang.llvm.org/docs/JSONCompilationDatabase.html ● Widely used and available ○ Generated by build systems ○ Used by static analysis to know how to analyze sources ○ IDEs to understand how a source

A Common Package Specification: Getting Build Tools to Talk to Each Other Lessons Learned From Making Thousands of Binaries Consumable by Any Build System Diego Rodriguez-Losada @ CppCon 2023Outline 3#include int main(void){ … deflateInit(&defstream, Z_BEST_COMPRESSION); Build system scripts Problem definition and scope 1. Define the version to use 2. Define the configuration: (system package manager or language package manager), build from source by the user, with that configuration 4. Pass information to the build system so it can locate and use it successfully 4#include

(const auto& i: arr){ // analyze i } } 78 78 Writing Our Own Tidy CheckReally Cool Stuff You Can Build 79 void OldAPI(int v, int m, int d){ NewAPI(m, v); } void NewAPI(int m, int v); - OldAPI(vel OldAPI(vel, mass, dist); + NewAPI(mass, vel); ABSL_DEPRECATE_AND_INLINE()Really Cool Stuff You Can Build 80 if (absl::GetFlag(FLAGS_Example_for_cpp_con)) { foo(); } else { bar(); } foo();In Conclusion

executables When running executables: ● Launching them ● Loading loadable plugins When configuring the build When packaging application for distributionWHEN shared libraries are needed When creating other executables: ● Launching them ● Loading loadable plugins When configuring the build When packaging application for distribution BUILD RUNWHICH programs need to locate shared libraries When creating other executables: ● Launching them ● Loading loadable plugins When configuring the build When packaging application for distribution Build system generator (Static) LINKER (Dynamic) LINKER/LOADER “Packaging tools”GNU

PKGBUILD, WPM ● Source repository structure ○ cxxproject.toml, pitchfork, https://wg21.link/p1204 ● Build workflows ○ ./configure && make && make install Why not? Scope and adoption friction! 5Then what frustrating about C++ development? ● 82% – Managing the libraries my application depends on ● 80% – Build times ● 71% – Setting up CI pipelines from scratch ● 69% – Concurrency safety ● 68% – Setting up 0x0000555555555144 in main () at jsonlog.cpp:44 12Pain: What’s a dependency bug? $ cmake --build build/ CMake Error at CMakeLists.txt:5 (find_package): By not providing "Findjsonlog.cmake" in CMAKE_MODULE_PATH

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 All platforms, all build systems and compilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.5 Stable . . API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 New build system integrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Conan, an open source, decentralized C/C++ package manager that works in all platforms and with all build systems and compilers. Other relevant resources: • Conan home page. Entry point to the project, with

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 All platforms, all build systems and compilers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.5 Stable . . API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 New build system integrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Conan, an open source, decentralized C/C++ package manager that works in all platforms and with all build systems and compilers. Other relevant resources: • Conan home page. Entry point to the project, with