mirror of
https://github.com/ziglang/zig.git
synced 2026-01-28 10:15:24 +00:00
b3b6ccba50
* breaking changes to the API. Some of the weird decisions from before are changed to what would be more expected. - `get` returns `?V`, use `getEntry` for the old API. - `put` returns `!void`, use `fetchPut` for the old API. * HashMap now has a comptime parameter of whether to store hashes with entries. AutoHashMap has heuristics on whether to set this parameter. For example, for integers, it is false, since equality checking is cheap, but for strings, it is true, since equality checking is probably expensive. * The implementation has a separate array for entry_index / distance_from_start_index. Entries no longer has holes; it is an ArrayList, and iteration is simpler and more cache coherent. This is inspired by Python's new dictionaries. * HashMap is separated into an "unmanaged" and a "managed" API. The unmanaged API is where the actual implementation is; the managed API wraps it and provides a more convenient API, storing the allocator. * Memory usage: When there are less than or equal to 8 entries, HashMap now incurs only a single pointer-size integer as overhead, opposed to using an ArrayList. * Since the entries array is separate from the indexes array, the holes in the indexes array take up less room than the holes in the entries array otherwise would. However the entries array also allocates additional capacity for appending into the array. * HashMap now maintains insertion order. Deletion performs a "swap remove". It's now possible to modify the HashMap while iterating.
A general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software.
Resources
- Introduction
- Download & Documentation
- Community
- Contributing
- Frequently Asked Questions
- Community Projects
Building from Source
Note that you can download a binary of master branch.
Stage 1: Build Zig from C++ Source Code
Dependencies
POSIX
- cmake >= 2.8.5
- gcc >= 5.0.0 or clang >= 3.6.0
- LLVM, Clang, LLD development libraries == 10.x, compiled with the same gcc or clang version above
- Use the system package manager, or build from source.
Windows
- cmake >= 3.15.3
- Microsoft Visual Studio. Supported versions:
- 2015 (version 14)
- 2017 (version 15.8)
- 2019 (version 16)
- LLVM, Clang, LLD development libraries == 10.x
- Use the pre-built binaries or build from source.
Instructions
POSIX
mkdir build
cd build
cmake ..
make install
Need help? Troubleshooting Build Issues
MacOS
brew install cmake llvm
brew outdated llvm || brew upgrade llvm
mkdir build
cd build
cmake .. -DCMAKE_PREFIX_PATH=$(brew --prefix llvm)
make install
You will now run into this issue:
homebrew and llvm 10 packages in apt.llvm.org are broken with undefined reference to getPollyPluginInfo
or
error: unable to create target: 'Unable to find target for this triple (no targets are registered)',
in which case try -DZIG_WORKAROUND_4799=ON
Hopefully this will be fixed upstream with LLVM 10.0.1.
Windows
See https://github.com/ziglang/zig/wiki/Building-Zig-on-Windows