commit aad9de322774c25e80f3ade6ecd96f45b62bf40a
Author: Ian Lance Taylor <iant@golang.org>
Date:   Tue Oct 29 15:39:02 2024 -0700

    syscall: don't define syscall stub on Hurd
    
    Patch from Samuel Thibault.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/623415

--- a/src/libgo/go/syscall/syscall_funcs.go
+++ b/src/libgo/go/syscall/syscall_funcs.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build darwin || dragonfly || freebsd || hurd || linux || netbsd || openbsd || solaris
-// +build darwin dragonfly freebsd hurd linux netbsd openbsd solaris
+//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package syscall
 
--- a/src/libgo/go/syscall/syscall_funcs_stubs.go
+++ b/src/libgo/go/syscall/syscall_funcs_stubs.go
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//go:build aix || rtems
-// +build aix rtems
+//go:build aix || hurd || rtems
+// +build aix hurd rtems
 
 // These are stubs.
 
--- a/src/libgo/runtime/go-nosys.c
+++ b/src/libgo/runtime/go-nosys.c
@@ -504,7 +504,7 @@ strerror_r (int errnum, char *buf, size_
 
 #endif /* ! HAVE_STRERROR_R */
 
-#ifndef HAVE_SYSCALL
+#if !defined(HAVE_SYSCALL) && !defined(__GNU__) /* GNU/Hurd already has a stub */
 int
 syscall(int number __attribute__ ((unused)), ...)
 {
