onqtam/ucm

Useful cmake macros that help with: compiler/linker flags, collecting sources, PCHs, Unity builds and other stuff.

Work

• 2022-∞: Headjack - The base layer of cyberspace: decentralized identity & content addressing at web-scale
• 2020-2020: Status - Worked on Ethereum 2 Proof of Stake client Nimbus (Beacon Chain)
• 2019-2020: NuoDB (distributed SQL DB) - Sped up C++ builds by 80%, worked on per-statement memory use tracking
• 2018-2019: Implemented hot code-reloading in the compiler of the Nim programming language
• 2016-2018: Worked on open source - doctest (C++ testing framework), rcrl (C++ RELP), game (game engine)
• 2013-2015: Chaos - Integrating V-Ray into Maya - worked on CMake, scene translator, XGen
• 2012-2013: Gameloft - Worked on gameplay/3D/UI/network/engine programming
• older: https://github.com/onqtam/code-evolution

Talks

• Internet 2.0: The Global Brain (slides) - code::dive 2023
• Headjack: Decentralized identity & content addressing at web-scale (slides) - code::dive 2022, Blockchain Sofia
• C++ as Assembly 2.0 - Hello Nim (slides) - code::dive 2019, OpenFest 2019
• The architecture of a modern SQL engine - query compilation, optimization and execution (slides) - C++ Sofia
• Nim - the first compiled language with full support for runtime hot code-reloading (slides) - ACCU 2019, C++ Sofia
• The Hitchhiker's Guide to Faster Builds (slides) - CppOnSea 2019, NDC TechTown 2019, C++ Russia 2019, C++ CoreHard 2019, code::dive 2018, MeetingC++ 2018, Total Chaos 2018, C++ Sofia
• Interactive C++ Compilation (REPL) Done in a Tiny and Embeddable Way (slides) - CppCon 2018, C++ Russia 2018
• Doctest: The Fastest C++ Testing Framework (slides) - CppCon 2017, code::dive, Cpp-Summit, CG2, OpenFest

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• Programming languages: C/C++, Nim, Python, TypeScript
• APIs, libraries & frameworks: Vue.js, Boost, Qt, Kafka, Protocol Buffers, LibClang, Seastar, LLVM
• Other: blockchains, Ethereum, compiler development, algorithms, databases, distributed systems, multi-threaded programming, testing, automation, game development, graphics programming, network programming

ucm's Issues

improve documentation

add option for ucm_remove_directories() to go through directories recursively

add option for ucm_remove_directories() to go through directories recursively
probably with an optional [RECURSIVE] flag

add support for manipulating flags per target

ucm_set_runtime() does not work with clang

should investigate this - gives a warning for unrecognized flags (-static-libstdc++ -static-libgcc) under linux and errors under osx

add working with linker flags for executables/modules/etc in different configs.

As of 37303d8, ucm_add_linker_flags is broken

Example of something we have for Visual Studio 2015:
ucm_add_linker_flags(EXE /DEBUG:Fastlink CONFIG Release)

This worked fine before. It adds that option to the "Configuration Properties->Linker->Generate Debug Info" project property.
As of 37303d8, it doesn't do anything.

typo in ucm_add_target - calling cgr_count_sources which doesn't exist

Usage of precompiled headers

I did not really get how to use the precompiled headers with ucm.

There is in the ucm_add_target() the PCH parameter. This probably should activate the usage of the generated pch.
But when I compile this target with -H as compile flag there is no precompiled header used. Only if I specified a header file with the PCH_FILE parameter.
Is this the expected behavior?

Though, this is not a big problem for me, because I want to specify the precompiled header myself.
I want to use the same pch for every target and it should only be compiled once. Is this possible with ucm?

ability to remove files with ucm_remove_directories only matching some string