toolchains_llvm
llvm-project
toolchains_llvm | llvm-project | |
---|---|---|
4 | 353 | |
268 | 25,839 | |
4.1% | 3.0% | |
8.8 | 10.0 | |
5 days ago | 1 day ago | |
Starlark | C++ | |
Apache License 2.0 | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
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.
toolchains_llvm
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cc toolchain for macOS Monterey / Apple M1
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive") BAZEL_TOOLCHAIN_TAG = "0.7.2" BAZEL_TOOLCHAIN_SHA = "f7aa8e59c9d3cafde6edb372d9bd25fb4ee7293ab20b916d867cd0baaa642529" http_archive( name = "com_grail_bazel_toolchain", sha256 = BAZEL_TOOLCHAIN_SHA, strip_prefix = "bazel-toolchain-{tag}".format(tag = BAZEL_TOOLCHAIN_TAG), canonical_id = BAZEL_TOOLCHAIN_TAG, url = "https://github.com/grailbio/bazel-toolchain/archive/{tag}.tar.gz".format(tag = BAZEL_TOOLCHAIN_TAG), ) load("@com_grail_bazel_toolchain//toolchain:deps.bzl", "bazel_toolchain_dependencies") bazel_toolchain_dependencies() load("@com_grail_bazel_toolchain//toolchain:rules.bzl", "llvm_toolchain") llvm_toolchain( name = "llvm_toolchain", llvm_version = "15.0.5", ) load("@llvm_toolchain//:toolchains.bzl", "llvm_register_toolchains") llvm_register_toolchains() http_archive( name = "com_google_googletest", urls = ["https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip"], strip_prefix = "googletest-609281088cfefc76f9d0ce82e1ff6c30cc3591e5", )
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Incremental Builds for Haskell with Bazel
Yeah the cross-compilation thing is definitely a rough spot. I have one project that's able to work around it via extensive hacks with macros, but at some point I'll need to do it "the right way."
Honestly if the docs had a canonical example of e.g. using unix_cc_toolchain_config (example: [0]) + Bootlin to compile for aarch64, it'd probably go a long way to making things understandable. Because say what you will about the old CROSSTOOL approach, at least there was a nice tutorial for it.
[0] https://github.com/grailbio/bazel-toolchain/blob/f14a8a5de8f...
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Cross-compiling to linux on MacOS with cgo
I'm really not familiar with this issue or Go nor C++ overall, but if all you need is to set up a C++ toolchain, this should be quite simple and solve your issue.
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WebAssembly
The trick is that to provide Bazel with a custom toolchain involves way more than just setting an environment variable, because Bazel wants to control installing and making available the compiler reliably (e.g., what if `emcc` is not present on the system where Bazel was invoked? Bazel solves that problem by fetching it and building it for that system)
There are projects that provide drop-in support for custom toolchains (e.g., we use this project[0] in Sorbet to fetch and build a custom LLVM/Clang toolchain for every host we build on (rather than relying on the system toolchain). But I'm not aware of a project that has done that for Emscripten. Maybe it would be as easy as plucking out what we've done in our project into a project that others could depend on, but to quote a colleague:
> Setting up a cc toolchain in Bazel is a unique sort of pain.
[0] https://github.com/grailbio/bazel-toolchain/
llvm-project
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Qt and C++ Trivial Relocation (Part 1)
As far as I know, libstdc++'s representation has two advantages:
First, it simplifies the implementation of `s.data()`, because you hold a pointer that invariably points to the first character of the data. The pointer-less version needs to do a branch there. Compare libstdc++ [1] to libc++ [2].
[1]: https://github.com/gcc-mirror/gcc/blob/065dddc/libstdc++-v3/...
[2]: https://github.com/llvm/llvm-project/blob/1a96179/libcxx/inc...
Basically libstdc++ is paying an extra 8 bytes of storage, and losing trivial relocatability, in exchange for one fewer branch every time you access the string's characters. I imagine that the performance impact of that extra branch is tiny, and massively confounded in practice by unrelated factors that are clearly on libc++'s side (e.g. libc++'s SSO buffer is 7 bytes bigger, despite libc++'s string object itself being smaller). But it's there.
The second advantage is that libstdc++ already did it that way, and to change it would be an ABI break; so now they're stuck with it. I mean, obviously that's not an "advantage" in the intuitive sense; but it's functionally equivalent to an advantage, in that it's a very strong technical answer to the question "Why doesn't libstdc++ just switch to doing it libc++'s way?"
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Playing with DragonRuby Game Toolkit (DRGTK)
This Ruby implementation is based on mruby and LLVM and it’s commercial software but cheap.
- Add support for Qualcomm Oryon processor
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Ask HN: Which books/resources to understand modern Assembler?
'Computer Architeture: A Quantitative Apporach" and/or more specific design types (mips, arm, etc) can be found under the Morgan Kaufmann Series in Computer Architeture and Design.
"Getting Started with LLVM Core Libraries: Get to Grips With Llvm Essentials and Use the Core Libraries to Build Advanced Tools "
"The Architecture of Open Source Applications (Volume 1) : LLVM" https://aosabook.org/en/v1/llvm.html
"Tourist Guide to LLVM source code" : https://blog.regehr.org/archives/1453
llvm home page : https://llvm.org/
llvm tutorial : https://llvm.org/docs/tutorial/
llvm reference : https://llvm.org/docs/LangRef.html
learn by examples : C source code to 'llvm' bitcode : https://stackoverflow.com/questions/9148890/how-to-make-clan...
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Flang-new: How to force arrays to be allocated on the heap?
See
https://github.com/llvm/llvm-project/issues/88344
https://fortran-lang.discourse.group/t/flang-new-how-to-forc...
- The LLVM Compiler Infrastructure
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Programming from Top to Bottom - Parsing
You can never mistake type_declaration with an identifier, otherwise the program will not work. Aside from that constraint, you are free to name them whatever you like, there is no one standard, and each parser has it own naming conventions, unless you are planning to use something like LLVM. If you are interested, you can see examples of naming in different language parsers in the AST Explorer.
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Look ma, I wrote a new JIT compiler for PostgreSQL
> There is one way to make the LLVM JIT compiler more usable, but I fear it’s going to take years to be implemented: being able to cache and reuse compiled queries.
Actually, it's implemented in LLVM for years :) https://github.com/llvm/llvm-project/commit/a98546ebcd2a692e...
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C++ Safety, in Context
> It's true, this was a CVE in Rust and not a CVE in C++, but only because C++ doesn't regard the issue as a problem at all. The problem definitely exists in C++, but it's not acknowledged as a problem, let alone fixed.
Can you find a link that substantiates your claim? You're throwing out some heavy accusations here that don't seem to match reality at all.
Case in point, this was fixed in both major C++ libraries:
https://github.com/gcc-mirror/gcc/commit/ebf6175464768983a2d...
https://github.com/llvm/llvm-project/commit/4f67a909902d8ab9...
So what C++ community refused to regard this as an issue and refused to fix it? Where is your supporting evidence for your claims?
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Clang accepts MSVC arguments and targets Windows if its binary is named clang-cl
For everyone else looking for the magic in this almost 7k lines monster, look at line 6610 [1].
[1] https://github.com/llvm/llvm-project/blob/8ec28af8eaff5acd0d...
What are some alternatives?
WSL - Source code behind the Windows Subsystem for Linux documentation.
zig - General-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
noclip.website - A digital museum of video game levels
Lark - Lark is a parsing toolkit for Python, built with a focus on ergonomics, performance and modularity.
content - The content behind MDN Web Docs
gcc
bazel_rules_qt - Bazel rules for Qt5
SDL - Simple Directmedia Layer
gcc-toolchain - A fully-hermetic Bazel GCC toolchain for Linux.
cosmopolitan - build-once run-anywhere c library
nixpkgs - Nix Packages collection & NixOS
windmill - Open-source developer platform to turn scripts into workflows and UIs. Fastest workflow engine (5x vs Airflow). Open-source alternative to Airplane and Retool.