chibicc
Cwerg
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chibicc | Cwerg | |
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21 | 59 | |
8,514 | 398 | |
- | - | |
0.0 | 9.6 | |
6 months ago | 4 days ago | |
C | Python | |
MIT License | Apache License 2.0 |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
chibicc
- Cwerg: C-like language that can be implemented in 10kLOC
- Apple hiring compiler developers for improving Swift / C++ interoperability
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GCC always assumes aligned pointer accesses
If a --k&r mode was to be reliable, wouldn't it need to get specified first? Otherwise people would start relying on some edge case.
If speed is not a requirement for the --k&r mode, you could just take the tis-interpreter and note that if it runs without UB, it is still much faster than an actual computer was when k&r were active.
Would it even be possible to specify a variant of C that contains no UB (e.g. would define exactly what happens on unaligned access), but can compile practical existing C89 programs? I wonder if it could be written such that it could actually specify the behaviour consistently across the language intersection supported by both of e.g. GCC 2.95 and Chibicc[0].
Or maybe there are so many bugs in GCC 2.95 that it would simply be infeasible? How much time would it take to specify?
[0]: https://github.com/rui314/chibicc
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EU to vote regulation that has a considerable potential to hurt OSS
I was on the Eclipse Foundation call a few days ago regarding this topic and they said there was a well-established 3-part test for this in the EU courts. But I don't think I managed to take a screenshot, sorry.
Here is a snippet from the EU Blue Guide linked the from the Eclipse blog post:
"Commercial activity is understood as providing goods in a business related context. Non-profit organisations may be considered as carrying out commercial activities if they operate in such a context. This can only be appreciated on a case by case basis taking into account the regularity of the supplies, the characteristics of the product, the intentions of the supplier, etc. In principle, occasional supplies by charities or hobbyists should not be considered as taking place in a business related context."
I would consider GCC or React to fit this definition, while a hobby project like https://github.com/rui314/chibicc not to fit it.
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Best practice to store context for a C compiler
chibicc
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SectorC: A C Compiler in 512 bytes
chibicc: https://github.com/rui314/chibicc (A reasonably digestible C implementation)
- List of (open source) C compilers
- Chibicc – A Small C Compiler
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Are Hoistings Possible for C++?
When you say a fork of LLVM, am I correct in assuming that you specifically mean a fork of Clang? I don't see how the compiler backend would affect support for language extensions, regardless of whether it's an exception to that such as Tcc, Cproc, the MIR C jitter, lacc, 8cc, 9cc, and chibicc. Most of those are not for production, excluding Cproc and Tcc (at least according to Suckless or Oasis).
Cwerg
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Cwerg: C-like language that can be implemented in 10kLOC
Perhaps these have already been dealt with and I'm missing critical information. If so, my apologies. Great work, in any case.
[1] https://github.com/robertmuth/Cwerg/tree/master/FrontEnd#dis...
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Where can I find resources and guides on how to build compiler backends?
Cwerg has backend that can be used as JIT and is written with readability in mind. Additional documentation can be found here: https://github.com/robertmuth/Cwerg/tree/master/Docs
- Most important language features not touched in the book "Crafting Interpreters"?
- Lack of resources in creating Assemblers from scratch.
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Minimum ISA Capabilities to Support Most (Non-Interactive) Programs?
I defined a basic ISA-like IR for Cwerg. It has unlimited registers and no constraints on immediates.
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How do you design a compiler and a language?
entire compiler front end ast nodes
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Syntax Design
I was also going down the path of bike shedding concrete syntax for my language Cwerg before pulling the plug on that effort and just using s-exprs. I managed to make the s-expr quite succinct by carefully choosing the order of arguments so I can omit optional ones. Also very helpful was to use square brackets for list, e.g. (call fun-name [arg1 arg2]). This simplifies parsing a little bit and is easier on the eye. Here are some Code Examples
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November 2022 monthly "What are you working on?" thread
I am iterating over the languages features for Cwerg's Frontend which aims to be a low level language with about the complexity of C but with some of the comforts of modern languages. I am especially happy with the choice of adding sum types. Relative to C the current feature set looks like this: Removed: * arrays decay to pointers * bitfields * separate compilation (more of a backend issue) * pre-processor * varargs * implcit type conversions * (untagged) unions * ++/-- * comma operator * implicitly nullable pointers * goto
- typed asts and codegen
- Features Compendium
What are some alternatives?
8cc - A Small C Compiler
mir - A lightweight JIT compiler based on MIR (Medium Internal Representation) and C11 JIT compiler and interpreter based on MIR
mold - Mold: A Modern Linker 🦠
tinycc - Unofficial mirror of mob development branch
build-your-own-x - Master programming by recreating your favorite technologies from scratch.
asmjit - Low-latency machine code generation
SmallerC - Simple C compiler
bluebird - A work-in-progess programming language modeled after Ada and C++
Co-dfns - High-performance, Reliable, and Parallel APL
konna - A fast functional language based on two level type theory
quickjs - Public repository of the QuickJS Javascript Engine.
boring-lang - A very boring programming language