[release-branch.go1.18] cmd/link: suppress -no_pie deprecation warning on darwin

Apparently the new darwin linker starts to emit a warning about
-no_pie deprecation. Maybe we want to switch to PIE by default.
For now, suppress the warning. This also makes it easier for
backporting to previous releases.

Fixes #55113.
Updates #55112, #54482.

Change-Id: I1a3b74c237a9d00ec3b030fc3a9940a31e5cd37e
Reviewed-on: https://go-review.googlesource.com/c/go/+/430937
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
(cherry picked from commit 706d84fca2b36fdf670a0d921e6a8a3b481eaa05)
Reviewed-on: https://go-review.googlesource.com/c/go/+/431518
Reviewed-by: Austin Clements <austin@google.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index 5fb0b3d21f..239e2dd4ef 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -1659,6 +1659,13 @@ func (ctxt *Link) hostlink() {
 	if len(out) > 0 {
 		// always print external output even if the command is successful, so that we don't
 		// swallow linker warnings (see https://golang.org/issue/17935).
+		if ctxt.IsDarwin() && ctxt.IsAMD64() {
+			const noPieWarning = "ld: warning: -no_pie is deprecated when targeting new OS versions\n"
+			if i := bytes.Index(out, []byte(noPieWarning)); i >= 0 {
+				// swallow -no_pie deprecation warning, issue 54482
+				out = append(out[:i], out[i+len(noPieWarning):]...)
+			}
+		}
 		ctxt.Logf("%s", out)
 	}