Building zig from source code using zig-bootstrap'ed zig

Help
1

I’d like to do some changes to the standard library. However, I have a hard time understanding how to build Zig from source code.

In order to avoid having to build LLVM myself, I downloaded zig-bootstrap and built that.

I’m stuggling to understand how to build another version using the binary from zig-bootstrap.

I was trying to follow the wiki instructions:

$path_to_zig_bootstrap/out/zig-x86_64-linux-gnu-baseline/zig build -p stage3 --search-prefix "$path_to_zig_bootstrap/out/x86_64-linux-gnu-baseline" --zig-lib-dir lib -Dstatic-llvm

I’m getting errors:

error: sub-compilation of compiler_rt failed                                                                                                                                 
    /home/lukas/projects/zig/zig/lib/compiler_rt/absvdi2.zig:10:36: note: calling convention 'x86_64_regcall_v3_sysv' not supported by compiler backend 'stage2_llvm'        
pub fn __absvdi2(a: i64) callconv(.c) i64 {

So I’m obviously doing something wrong.

Are there an up-to-date instructions how to use zig-bootstrap to build another version of zig?

2

You don’t need to build Zig from source if you just want to change the standard library, you can directly edit the standard library.

I haven’t tried zig-bootstrap, but last time I built Zig I used this and it worked well (just took a long time on my slow laptop):

I guess you would have to update the llvm version numbers.

3

I can’t run tests, because std in master depends on a different language version. I’ll have a look at the thread, thank you.