But how this tool figures out where the header files and build instructions for the libraries are that are included? Any expected layout or industry wide consensus?
https://github.com/randerson112/craft/blob/main/CMakeLists.t...
...and for custom requirements a manually created CMakeLists.extras.txt as escape hatch.
Unclear to me how more interesting scenarios like compiler- and platform-specific build options (enable/disable warnings, defines, etc...), cross-compilation via cmake toolchain files (e.g. via Emscripten SDK, WASI SDK or Android SDK/NDK) would be handled. E.g. just trivial things like "when compiling for Emscripten, include these source files, but not those others".
Just alone reverse engineering the Xcode and Visual Studio project file formats for each IDE version isn't fun, but this "boring" grunt work is what makes cmake so valuable.
The core ideas of cmake are sound, it's only the scripting language that sucks.
Build systems don't plan to converge in the future =)
Here's my feeble attempt using Deno as base (it's extremely opinionated though and mostly for personal use in my hobby projects):
https://github.com/floooh/fibs
One interesting chicken-egg-problem I couldn't solve is how to figure out the C/C++ toolchain that's going to be used without running cmake on a 'dummy project file' first. For some toolchain/IDE combos (most notably Xcode and VStudio) cmake's toolchain detection takes a lot of time unfortunately.
curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | shI wish there was a dead simple installer TUI that had a common API specification so that you could host your installer spec on your.domain.com/install.json - point this TUI at it and it would understand the fine grained permissions required, handle required binary signature validation, manifest/sbom validation, give the user freedom to customize where/how things were installed, etc.
How does craft handle these 'diamond' patterns where 2 dependencies may depend on versions of the same library as transitive dependencies (either for static or dynamic linking or as header-only includes) without custom build scripts like the Conan approach?
Cmake has a lot of warts, but they have also put a lot of effort into finding and fixing all those weird special cases. If your project uses CMake odds are high it will build anywhere.
You need to define a CMake toolchain[1] and pass it to CMake with --toolchain /path/to/file in the command-line, or in a preset file with the key `toolchainFile` in a CMake preset. I've compiled for QNX and ARM32 boards with CMake, no issues, but this needs to be done.
[1]: https://cmake.org/cmake/help/latest/manual/cmake-toolchains....
Not sure how big your plans are.
My thoughts would be to start as a cmake generator but to eventually replace it. Maybe optionally.
And to integrate suppoet for existing package managers like vcpkg.
At the same time, I'd want to remain modular enough that's it's not all or nothing. I also don't like locking.
But right now package management and build system are decoupled completely. And they are not like that in other ecosystems.
For example, Cmake can use vcpkg to install a package but then I still have to write more cmake to actually find and use it.
I have this solved at our company. We have a tool built on top of vcpkg, to manage internal + external dependencies. Our cmake linker logic leverages the port names and so all you really do is declare your manifest file (vcpkg.json) then declare which one of them you will export publicly.
Everything after that is automatic including the exported cmake config for your library.
What I've been doing to manage dependencies in a way that doesn't depress me much has been Nix flakes, which allows me a pretty straightforward `nix build` with the correct dependencies built in.
I'm just a bit curious though; a lot of C libraries are system-wide, and usually require the system package manager (e.g. libsdl2-dev) does this have an elegant way to handle those?
I'm sorry I have to be a downer, but the fact is if you can use the word "I" your package manager is obviously not powerful enough for the real world.
- Problem exists
- Proposals of solutions, (varying quality), or not
- "You can't just solve this. It's complicated! This problem must exist". (The post I'm replying to
- Problem gets solved, hopefully.
The world is rich in complexity, subtlety, and exceptions to categorization. I don't think this should block us from solving problems.
https://github.com/xmake-io/xmake
The reason why I like it (beyond ease-of-use) is that it can spit out CMakeLists.txt and compile_commands.json for IDE/LSP integration and also supports installing Conan/vcpkg libraries or even Git repos.
set_project("myapp")
set_languages("c++20")
add_requires("conan::fmt/11.0.2", {alias = "fmt"})
add_requires("vcpkg::fmt", {alias = "fmt"})
add_requires("git://github.com/fmtlib/fmt v11.0.2", {alias = "fmt"})
target("myapp")
set_kind("binary")
add_files("src/*.cpp")
add_packages("fmt")
# Generate compile_commands.json and CMakeLists.txt
$ xmake project -k compile_commands
$ xmake project -k cmake
# Build + run
$ xmake && xmake run myappAs an example of what I mean, say I want to link to the FMOD library (or any library I legally can't redistribute as an SDK). Or I want to enable automatic detection on Windows where I know the library/SDK is an installer package. My solution, in CMake, is to just ask the registry. In XMake I still can't figure out how to pull this off. I know that's pretty niche, but still.
The documentation gap is the biggest hurtle. A lot of the functions/ways of doing things are poorly documented, if they are at all. Including a CMake library that isn't in any of the package managers for example. It also has some weird quirks: automatic/magic scoping (which is NOT a bonus) along with a hack "import" function instead of using native require.
All of this said, it does work well when it does work. Especially with modules.
It's similar, but designed for an existing ecosystem. Cargo is designed for `cargo`, obviously.
But `pyproject.toml` is designed for the existing tools to all eventually adopt. (As well as new tools, of course.)
C++ build system, at the core, boils down to calling gcc foo.c -o foo.obj / link foo.obj foo.exe (please forgive if I got they syntax wrong).
Sure, you have more .c files, and you pass some flags but that's the core.
I've recently started a new C++ program from scratch.
What build system did I write?
I didn't. I told Claude:
"Write a bun typescript script build.ts that compiles the .cpp files with cl and creates foo.exe. Create release and debug builds, trigger release build with -release cmd-line flag".
And it did it in minutes and it worked. And I can expand it with similar instructions. I can ask for release build with all the sanitize flags and claude will add it.
The particulars don't matter. I could have asked for a makefile, or cmake file or ninja or a script written in python or in ruby or in Go or in rust. I just like using bun for scripting.
The point is that in the past I tried to learn cmake and good lord, it's days spent learning something that I'll spent 1 hr using.
It just doesn't make sense to learn any of those tools given that claude can give me working any build system in minutes.
It makes even less sense to create new build tools. Even if you create the most amazing tool, I would still choose spending a minute asking claude than spending days learning arbitrary syntax of a new tool.
randerson_112•1h ago
Every time I wanted to start something new I'd spend the first hour writing CMakeLists.txt, figuring out find_package, copying boilerplate from my last project, and googling why my library isn't linking. By the time the project was actually set up I'd lost all momentum.
So, I built Craft - a lightweight build and workflow tool for C and C++.
Instead of writing CMake, your project configuration goes in a simple craft.toml:
[project] name = "my_app" version = "0.1.0" language = "c" c_standard = 99
[build] type = "executable"
Run craft build and Craft generates the CMakeLists.txt automatically and builds your project.
Want to add dependencies? That's just a simple command:
craft add --git https://github.com/raysan5/raylib --links raylib craft add --path ../my_library craft add sfml
Craft will clone the dependency, regenerate the CMake, and rebuild your project for you.
Other Craft features:
craft init - adopt an existing C/C++ project into Craft or initialize an empty directory.
craft template - save any project structure as a template to be initialized later.
craft gen - generate header and source files with starter boilerplate code.
craft upgrade - keeps itself up to date.
CMakeLists.extra.cmake for anything that Craft does not yet handle.
Cross platform - macOS, Linux, Windows.
It is still early (I just got it to v1.0.0) but I am excited to be able to share it and keep improving it.
GitHub repo: https://github.com/randerson112/craft
Would love feedback. Please also feel free to make pull requests if you want to help with development!
adev_•2m ago
- (1) Provide a way to compile without internet access and specify the associated dependencies path manually. This is absolutely critical.
Most 'serious' multi-language package managers and integration systems build in a sandbox without internet access for security reasons and reproducibility reasons.
If your build system does not allow to build offline and with manually specified depdemdencies, you will make life of integrator and package managers miserable and they will avoid your project.
(2) Never ever build in '-03 -march=native" by default. This is always a red flag and a sign of immaturity. People expect code to be portable and shippable.
Good default options should be CMake equivalent of "RelWithDebInfo" (meaning: -O2 -g -DNDEBUG ).
-O3 can be argued. -march=native is always always a mistake.
- (3) Allow your build tool to be built by an other build tool (e.g CMake).
Anybody caring about reproducibility will want to start from sources, no binary. This also matter for cross compilation.
- (4) Please offer a compatibilities with pkg-config (https://en.wikipedia.org/wiki/Pkg-config) and if possible CPS (https://cps-org.github.io/cps/overview.html) for both consumption and generation.
They are what will allow interoperability between your system and other build system.
- (5) last but not least: Consider seriously cross-compilation use case.
It is common in the world of embedded systems to cross compile. Any build system that does not support that will be de facto banned from this domain.