`libsql_experimental.a` linker warnings on macOS

[ThomasGormley]

The pre-compiled libsql_experimental.a static library for darwin_arm64 was built targeting macOS 15.5, which causes issuies on systems where MACOSX_DEPLOYMENT_TARGET defaults to a lower version (in my case it's 15.0).

I had tried some steps for a smilar issue in Go's tracker from some years ago

• Upgraded macOS to latest non-major version (15.7.3)
• Reinstalled Xcode Command Line Tools
• Cleared Go module cache (go clean -cache -modcache && go mod tidy)
• Tested with both Homebrew-installed Go and official Go distribution

Is it reasonable to target a lower version when building libsql_experimental.a?

Thanks

Reproduction

1. Install go-libsql in a Go project:

   go get github.com/tursodatabase/go-libsql

2. Build any program that imports the package:

   go build ./...

3. Observe linker warnings:

   ld: warning: object file (/Users/xxx/go/pkg/mod/github.com/tursodatabase/go-libsql@v0.0.0-20251219133454-43644db490ff/lib/darwin_arm64/libsql_experimental.a[24](fad98b632b8ce3cc-curve25519.o)) was built for newer 'macOS' version (15.5) than being linked (15.0)
   ld: warning: object file (...libsql_experimental.a[26](ca8bd8684bb569fa-montgomery.o)) was built for newer 'macOS' version (15.5) than being linked (15.0)
   ld: warning: object file (...libsql_experimental.a[149](sqlite3mc.c.o)) was built for newer 'macOS' version (15.5) than being linked (15.0)
   # ... (20+ similar warnings)
   

[avinassh]

hey, yes, it is reasonable and we can target lower versions. The libraries are auto generated from github workflow - https://github.com/tursodatabase/go-libsql/blob/main/.github/workflows/update-libsql.yml

but I am unsure if Github lets you select minor version https://docs.github.com/en/actions/reference/runners/github-hosted-runners#standard-github-hosted-runners-for-public-repositories

[ThomasGormley]

Great, thanks. I'm not all too clued up on the details but my understanding was that this was a build flag as opposed to requiring a specific runner instance.

[ThomasGormley]

@avinassh maybe this change would be enough? Although the number you want to support is up to you

- name: Build libsql for macOS
  working-directory: libsql/bindings/c
  env:
    MACOSX_DEPLOYMENT_TARGET: "12.0" 
  run: |
    cargo build --release

[avinassh]

@ThomasGormley I can confirm this works, I opened a PR here: #86

[ThomasGormley]

thank you for the quick turnaround!