a0427d29e4
```zig
export fn entry() void {
var nothing: ?*i32 = null;
var whatever = if (nothing) |x1| i32(1) else unreachable;
}
```
```llvm
define void @entry() #2 !dbg !35 {
Entry:
%nothing = alloca i32*, align 8
%whatever = alloca i32, align 4
store i32* null, i32** %nothing, align 8, !dbg !45
call void @llvm.dbg.declare(metadata i32** %nothing, metadata !39, metadata !DIExpression()), !dbg !45
%0 = load i32*, i32** %nothing, align 8, !dbg !46
%1 = icmp ne i32* %0, null, !dbg !46
br i1 %1, label %OptionalThen, label %OptionalElse, !dbg !46
OptionalThen: ; preds = %Entry
call void @llvm.dbg.declare(metadata i32** %nothing, metadata !43, metadata !DIExpression()), !dbg !46
store i32 1, i32* %whatever, align 4, !dbg !47
br label %OptionalEndIf, !dbg !46
OptionalElse: ; preds = %Entry
tail call fastcc void @panic(%"[]u8"* @1, %builtin.StackTrace* null), !dbg !48
unreachable, !dbg !48
OptionalEndIf: ; preds = %OptionalThen
call void @llvm.dbg.declare(metadata i32* %whatever, metadata !44, metadata !DIExpression()), !dbg !49
ret void, !dbg !50
}
```
|
||
|---|---|---|
| .builds | ||
| .github | ||
| c_headers | ||
| ci | ||
| cmake | ||
| deps | ||
| doc | ||
| example | ||
| libc | ||
| libcxx/include | ||
| libunwind | ||
| src | ||
| src-self-hosted | ||
| std | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| BRANCH_TODO | ||
| build.zig | ||
| CMakeLists.txt | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| README.md | ||
Zig is an open-source programming language designed for robustness, optimality, and maintainability.
Resources
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 == 8.x, compiled with the same gcc or clang version above
- Use the system package manager, or build from source.
Windows
- cmake >= 2.8.5
- Microsoft Visual Studio 2017 (version 15.8)
- LLVM, Clang, LLD development libraries == 8.x, compiled with the same MSVC version above
- Use the pre-built binaries or build from source.
Instructions
POSIX
mkdir build
cd build
cmake ..
make install
MacOS
brew install cmake llvm@8
brew outdated llvm@8 || brew upgrade llvm@8
mkdir build
cd build
cmake .. -DCMAKE_PREFIX_PATH=/usr/local/Cellar/llvm/8.0.0
make install
Windows
See https://github.com/ziglang/zig/wiki/Building-Zig-on-Windows
Stage 2: Build Self-Hosted Zig from Zig Source Code
Note: Stage 2 compiler is not complete. Beta users of Zig should use the Stage 1 compiler for now.
Dependencies are the same as Stage 1, except now you can use stage 1 to compile Zig code.
bin/zig build --build-file ../build.zig --prefix $(pwd)/stage2 install
This produces ./stage2/bin/zig which can be used for testing and development.
Once it is feature complete, it will be used to build stage 3 - the final compiler
binary.
Stage 3: Rebuild Self-Hosted Zig Using the Self-Hosted Compiler
Note: Stage 2 compiler is not yet able to build Stage 3. Building Stage 3 is not yet supported.
Once the self-hosted compiler can build itself, this will be the actual compiler binary that we will install to the system. Until then, users should use stage 1.
Debug / Development Build
./stage2/bin/zig build --build-file ../build.zig --prefix $(pwd)/stage3 install
Release / Install Build
./stage2/bin/zig build --build-file ../build.zig install -Drelease-fast