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adjust building from source without LLVM process

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The idea here is that the zig2 executable is perhaps the more useful
deliverable until we implement our own optimization passes. This will
allow system packages to provide Zig, and use it to compile Zig
projects, all without LLVM!
This commit is contained in:
Andrew Kelley
2023-11-13 14:30:21 -07:00
parent 569182dbb2
commit f8b38a174f
4 changed files with 13 additions and 20 deletions
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16
README.md
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@@ -70,14 +70,13 @@ In this case, the only system dependency is a C compiler.
```
cc -o bootstrap bootstrap.c
./bootstrap build
./bootstrap
```
You can pass any options to this that you would pass to `zig build` (see
`--help` for options).
[Without LLVM extensions](https://github.com/ziglang/zig/issues/16270), a Zig
compiler is missing these features:
This produces a `zig2` executable in the current working directory. This is a
"stage2" build of the compiler,
[without LLVM extensions](https://github.com/ziglang/zig/issues/16270), and is
therefore lacking these features:
- Release mode optimizations
- aarch64 machine code backend
- `@cImport` / `zig translate-c`
@@ -86,7 +85,6 @@ compiler is missing these features:
- [Some ELF linking features](https://github.com/ziglang/zig/issues/17749)
- [Most COFF/PE linking features](https://github.com/ziglang/zig/issues/17751)
- [Some WebAssembly linking features](https://github.com/ziglang/zig/issues/17750)
- [COFF linking](https://github.com/ziglang/zig/issues/17751)
- [Ability to output LLVM bitcode](https://github.com/ziglang/zig/issues/13265)
- [Windows resource file compilation](https://github.com/ziglang/zig/issues/17752)
- [Ability to create import libs from def files](https://github.com/ziglang/zig/issues/17807)
@@ -94,6 +92,10 @@ compiler is missing these features:
- [Ability to create static archives from object files](https://github.com/ziglang/zig/issues/9828)
- Ability to compile C++, Objective-C, and Objective-C++ files
However, a compiler built this way does provide a C backend, which may be
useful for creating system packages of Zig projects using the system C
toolchain. In such case, LLVM is not needed!
## Contributing
[Donate monthly](https://ziglang.org/zsf/).