Incompatible with Go 1.23, which doesn't allow //go:linkname to internal symbols, including to runtime package

[stefanb]

While testing Go 1.23 rc1 in

• go 1.23, [email protected] 1.22.6 (new formula) Homebrew/homebrew-core#175310

there was an error:

  # github.com/gotranspile/cxgo/cmd/cxgo
  link: github.com/gotranspile/cxgo/runtime/libc: invalid reference to runtime.findnull

Go 1.23 no longer allows //go:linkname * runtime.* link instructioins, see

• https://tip.golang.org/doc/go1.23#linker
• cmd/link: lock down future uses of linkname golang/go#67401

It is used several times in
https://github.com/gotranspile/cxgo/blob/29871598a6a289a52f5c92cfc3da031b8aa1ce6b/runtime/libc/runtime.go

[dennwc]

Yeah, it should have happened sooner or later. Will fix it. Thank you for the early notice!

[stefanb]

Please don't forget to tag a release sometime before Go 1.23 is released in August.