shiny/driver/mtldriver: add cgo build constraint

The mtldriver package requires cgo even though it itself doesn't import
"C" directly. This is because it imports Go packages that require cgo.

So, add the 'cgo' build constraint to mtldriver too, since it can't do
its job without it.

This fixes 'build constraints exclude all Go files' build errors when
CGO_ENABLED is set to 0. Uncovered incidentally while cross-compiling
to another platform, which happens to disable cgo by default.

For golang/go#61698.

Change-Id: I298018e79a5e93a55d39bda2b253686cde8b5e8a
Run-TryBot: Dmitri Shuralyov <>
TryBot-Result: Gopher Robot <>
Reviewed-by: Ian Lance Taylor <>
Reviewed-by: Dmitri Shuralyov <>
Auto-Submit: Dmitri Shuralyov <>
5 files changed
tree: c047362ae22b88d8524de44c68d5ca55432645cb
  1. apidiff/
  2. cmd/
  3. constraints/
  4. devtools/
  5. ebnf/
  6. ebnflint/
  7. errors/
  8. event/
  9. inotify/
  10. io/
  11. jsonrpc2/
  12. maps/
  13. mmap/
  14. rand/
  15. shiny/
  16. shootout/
  17. slices/
  18. slog/
  19. sumdb/
  20. typeparams/
  21. utf8string/
  22. .gitattributes
  23. .gitignore
  24. codereview.cfg
  26. go.mod
  27. go.sum



This subrepository holds experimental and deprecated (in the old directory) packages.

The idea for this subrepository originated as the pkg/exp directory of the main repository, but its presence there made it unavailable to users of the binary downloads of the Go installation. The subrepository has therefore been created to make it possible to go get these packages.

Warning: Packages here are experimental and unreliable. Some may one day be promoted to the main repository or other subrepository, or they may be modified arbitrarily or even disappear altogether.

In short, code in this subrepository is not subject to the Go 1 compatibility promise. (No subrepo is, but the promise is even more likely to be violated by go.exp than the others.)

Caveat emptor.