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Comment from this commit reproduced here: LLVM does not allow us to change the type of globals. So we must create a new global with the correct type, copy all its attributes, and then update all references to point to the new global, delete the original, and rename the new one to the old one's name. This is necessary because LLVM does not support const bitcasting a struct with padding bytes, which is needed to lower a const union value to LLVM, when a field other than the most-aligned is active. Instead, we must lower to an unnamed struct, and pointer cast at usage sites of the global. Such an unnamed struct is the cause of the global type mismatch, because we don't have the LLVM type until the *value* is created, whereas the global needs to be created based on the type alone, because lowering the value may reference the global as a pointer.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
- Introduction
- Download & Documentation
- Chapter 0 - Getting Started | ZigLearn.org
- Community
- Contributing
- Code of Conduct
- Frequently Asked Questions
- Community Projects
Installation
- download a pre-built binary
- install from a package manager
- build from source
- bootstrap zig for any target
License
The ultimate goal of the Zig project is to serve users. As a first-order effect, this means users of the compiler, helping programmers to write better software. Even more important, however, are the end-users.
Zig is intended to be used to help end-users accomplish their goals. Zig should be used to empower end-users, never to exploit them financially, or to limit their freedom to interact with hardware or software in any way.
However, such problems are best solved with social norms, not with software licenses. Any attempt to complicate the software license of Zig would risk compromising the value Zig provides.
Therefore, Zig is available under the MIT (Expat) License, and comes with a humble request: use it to make software better serve the needs of end-users.
This project redistributes code from other projects, some of which have other licenses besides MIT. Such licenses are generally similar to the MIT license for practical purposes. See the subdirectories and files inside lib/ for more details.