From 978616433392369fbe26a189f00b078d2c4856fa Mon Sep 17 00:00:00 2001
From: Cherry Mui <cherryyz@google.com>
Date: Mon, 10 Jul 2023 19:04:57 -0400
Subject: [PATCH] [release-branch.go1.21 cmd/cgo/internal/test: don't pass -lm
 on darwin

On darwin, -lm is not necessary as the math functions are included
in libSystem. Passing -lm multiple times results in linker
warnings. Don't pass it on darwin.

For #61229.

Change-Id: I72d8dab1f0eead68cbeb176ac97b8ed1a0cfddab
Reviewed-on: https://go-review.googlesource.com/c/go/+/508697
Run-TryBot: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
(cherry picked from commit 333c80694c797b5540c959f33c710bc6eba0d141)
Reviewed-on: https://go-review.googlesource.com/c/go/+/513758
---
 src/cmd/cgo/internal/test/issue8756.go           | 2 +-
 src/cmd/cgo/internal/test/issue8756/issue8756.go | 2 +-
 src/cmd/cgo/internal/test/test.go                | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/cmd/cgo/internal/test/issue8756.go b/src/cmd/cgo/internal/test/issue8756.go
index 1ec85a8a5e..817f449e96 100644
--- a/src/cmd/cgo/internal/test/issue8756.go
+++ b/src/cmd/cgo/internal/test/issue8756.go
@@ -1,7 +1,7 @@
 package cgotest
 
 /*
-#cgo LDFLAGS: -lm
+#cgo !darwin LDFLAGS: -lm
 #include <math.h>
 */
 import "C"
diff --git a/src/cmd/cgo/internal/test/issue8756/issue8756.go b/src/cmd/cgo/internal/test/issue8756/issue8756.go
index 5f6b7778ff..223397f067 100644
--- a/src/cmd/cgo/internal/test/issue8756/issue8756.go
+++ b/src/cmd/cgo/internal/test/issue8756/issue8756.go
@@ -1,7 +1,7 @@
 package issue8756
 
 /*
-#cgo LDFLAGS: -lm
+#cgo !darwin LDFLAGS: -lm
 #include <math.h>
 */
 import "C"
diff --git a/src/cmd/cgo/internal/test/test.go b/src/cmd/cgo/internal/test/test.go
index 8e24f2e618..7da5a856b3 100644
--- a/src/cmd/cgo/internal/test/test.go
+++ b/src/cmd/cgo/internal/test/test.go
@@ -23,7 +23,7 @@ package cgotest
 #include <unistd.h>
 #include <sys/stat.h>
 #include <errno.h>
-#cgo LDFLAGS: -lm
+#cgo !darwin LDFLAGS: -lm
 
 #ifndef WIN32
 #include <pthread.h>
-- 
2.48.1