6461d74bf2
Currently, dist attempts to build the bootstrap with the GOEXPERIMENT set in the environment. However, the logic is incomplete and notably requires a hack to enable the appropriate build tags for GOEXPERIMENT=regabi. Without this hack, the build becomes skewed between a compiler that uses regabi and a runtime that doesn't when building toolchain2. We could try to improve the GOEXPERIMENT processing in cmd/dist, but it will always chase cmd/internal/objabi and it's quite difficult to share the logic with objabi because of the constraints on building cmd/dist. Instead, we switch to building go_bootstrap without any GOEXPERIMENT and only start using GOEXPERIMENT once we have a working, modern cmd/go (which has all the GOEXPERIMENT logic in it). We also build toolchain1 without any GOEXPERIMENT set, in case the bootstrap toolchain is recent enough to understand build-time GOEXPERIMENT settings. As part of this, we make GOEXPERIMENT=none mean "no experiments". This is necessary since, now that we support setting GOEXPERIMENT at build time, we need an explicit way to say "ignore all baked-in experiments". For #40724. Change-Id: I115399579b766a7a8b2f352f7e5efea5305666cd Reviewed-on: https://go-review.googlesource.com/c/go/+/302050 Trust: Austin Clements <austin@google.com> Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: David Chase <drchase@google.com> Reviewed-by: Cherry Zhang <cherryyz@google.com> |
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