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Revert "made important section in 1b bold"

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

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Revert "made the instructions as to how to determine the url of the Windows Zig Compiler dev kit clearer"

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Andrew Kelley 2024-03-10 21:34:37 -07:00
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16
Building-Zig-on-Windows.md

@ -6,14 +6,12 @@
This one has the benefit that LLVM, LLD, and Clang are built in Release mode, while your Zig build has the option to be a Debug build. It also works completely independently from MSVC so you don't need it to be installed.
The Dev Kit can be downloaded from a url that has the following form,
Determine the URL by [looking at the CI script](https://github.com/ziglang/zig/blob/master/ci/x86_64-windows-debug.ps1#L1-L4). It will look something like this (replace `$VERSION` with the one you see by following the above link):
```
https://ziglang.org/deps/zig+llvm+lld+clang-x86_64-windows-gnu-$VERSION.zip
```
where you will need to replace `$VERSION`. To do this, determine the precise URL by looking at the [CI script](https://github.com/ziglang/zig/blob/master/ci/x86_64-windows-debug.ps1#L1-L4), specifically the variables `$ZIG_LLVM_CLANG_LLD_NAME` and `$ZIG_LLVM_CLANG_LLD_URL` (currently lines 2 and 4).
This zip file contains:
* An older Zig installation.
@ -58,21 +56,17 @@ This can take a long time. For tips & tricks on using the test suite, see [Contr
### Option 1b: Zig build
The Dev Kit contains a Zig compiler that can be used to build Zig from source.
Unzip the dev kit and then in cmd.exe in your Zig source checkout:
First unzip the Dev Kit. Let `$DEVKIT` denote the path to the unzipped Dev Kit. The Zig compiler in the Dev Kit is located at: `$DEVKIT\bin\zig.exe`.
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:
```
```bat
$DEVKIT\bin\zig.exe build -p stage3 --search-prefix $DEVKIT --zig-lib-dir lib -Dstatic-llvm -Duse-zig-libcxx -Dtarget=x86_64-windows-gnu
```
NOTE: In the command above, both instances of `$DEVKIT` will need to be substituted with the path to the unzipped Dev Kit.
Replace `$DEVKIT` with the path to the folder that you unzipped after downloading it from the link above.
Append `-Doptimize=ReleaseSafe` for a Release build.
**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:
**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:
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.