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rewrote beginning of Option 1b to make it super clear what to do

10aded 2024-02-07 17:04:47 -05:00
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Building-Zig-on-Windows.md

@ -58,17 +58,19 @@ This can take a long time. For tips & tricks on using the test suite, see [Contr
### Option 1b: Zig build
Unzip the dev kit and then in cmd.exe in your Zig source checkout:
The Dev Kit contains a Zig compiler that can be used to build Zig from source.
```bat
$DEVKIT\bin\zig.exe build -p stage3 --search-prefix $DEVKIT --zig-lib-dir lib -Dstatic-llvm -Duse-zig-libcxx -Dtarget=x86_64-windows-gnu
```
First unzip the Dev Kit. Let `$DEVKIT` denote the path to the unzipped Dev Kit. The Zig compiler in the Dev Kit is located at: `$DEVKIT\bin\zig.exe`.
Replace `$DEVKIT` with the path to the folder that you unzipped after downloading it from the link above.
Now navigate to the source of the compiler you wish to build. Then, using the Dev Kit compiler, attempt to build the compiler from source:
``$DEVKIT\bin\zig.exe build -p stage3 --search-prefix $DEVKIT --zig-lib-dir lib -Dstatic-llvm -Duse-zig-libcxx -Dtarget=x86_64-windows-gnu``
NOTE: In the command above, both instances of `$DEVKIT` will need to be substituted with the path to the unzipped Dev Kit.
Append `-Doptimize=ReleaseSafe` for a Release build.
**If you get an error building at this step**, it is most likely that the Zig installation inside the dev kit is too old, and the dev kit needs to be updated. In this case one more step is required:
You may get a build error during this step. In such a case, it is most likely that the Zig installation inside the dev kit is too old, and the dev kit needs to be updated. In this case one more step is required:
1. [Download the latest master branch zip file](https://ziglang.org/download/#release-master).
2. Unzip, and try the above command again, replacing the path to zig.exe with the path to the zig.exe you just extracted, and also replace the lib\zig folder with the new contents.