cmd/link/internal/ld: use libc based fcntl for (*OutBuf).fallocate on darwin

Direct syscalls are no longer supported on darwin. Instead, use libc
fcntl go:linkname'd from the syscall package.

Change-Id: Ieeec64810452455faedd200f661a8b5839ca1fa0
Reviewed-on: https://go-review.googlesource.com/c/go/+/255260
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
1 file changed
tree: 66f9d5dac3be8072b8fa75dd5e1fcdfda00059a6
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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