cmd/link/internal/ld: don't use linkname before 1.12

Before the 1.12 release the use of linkname did not prevent a compiler
error for an empty function body (see #23311). Add some build tags so
that cmd/link will build with earlier releases.

It's true that we currently require Go 1.16 as the bootstrap compiler (#44505).
But for this simple case keep things working with older compilers for now.

Change-Id: I67fe021406096c64c01d6e2c9adbcc4388988a6e
Trust: Ian Lance Taylor <>
Run-TryBot: Ian Lance Taylor <>
Reviewed-by: Russ Cox <>
3 files changed
tree: 64305bcf12506d0fcc7c87f68b9c91f47cbbc9e9
  1. .gitattributes
  2. .github/
  3. .gitignore
  11. api/
  12. codereview.cfg
  13. doc/
  14. lib/
  15. misc/
  16. src/
  17. test/

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