From e38ba073dbe776bfcfa0fa5299c1b78e9798a8ee Mon Sep 17 00:00:00 2001
From: Clemens Lang <cal@macports.org>
Date: Sun, 12 Apr 2026 13:47:55 +0200
Subject: [PATCH] configure: Disable trace mode on arm64 macOS <= 14

/bin/ln on macOS 14 is built with a set of relocations that break when
binary-patching the architecture from arm64e to arm64, leading to 'dyld:
bad bind opcode 0x19'.

Newer versions don't seem to ship such binaries, so until somebody comes
along to find a solution for these few binaries, let's just disable
tracemode support on macOS <= 14.
---
 aclocal.m4 | 10 ++++++++++
 configure  | 11 +++++++++++
 2 files changed, 21 insertions(+)

diff --git a/aclocal.m4 b/aclocal.m4
index 985e7848c..5b4061b0a 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1185,6 +1185,16 @@ AC_DEFUN([MP_TRACEMODE_SUPPORT],[
 		elif test x"${ac_cv_func_kevent}" != "xyes"; then
 			AC_MSG_RESULT([kevent() not available, no])
 			TRACEMODE_SUPPORT=0
+		elif test x"$(arch)" == "xarm64" && test "$(sw_vers --productVersion | cut -d. -f1)" -le 14; then
+			# /bin/ln on macOS 14 is built with a set of relocations that break
+			# when binary-patching the architecture from arm64e to arm64,
+			# leading to 'dyld: bad bind opcode 0x19'.
+			#
+			# Newer versions don't seem to ship such binaries, so until
+			# somebody comes along to find a solution for these few binaries,
+			# let's just disable tracemode support on macOS <= 14.
+			AC_MSG_RESULT([arm64 on macOS <= 14, no])
+			TRACEMODE_SUPPORT=0
 		else
 			AC_EGREP_CPP(yes_have_ev_receipt, [
 				#include <sys/types.h>
diff --git a/configure b/configure
index dd358acb3..511fe9b59 100755
--- a/configure
+++ b/configure
@@ -9069,6 +9069,17 @@ printf '%s\n' "kqueue() not available, no" >&6; }
 			{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: kevent() not available, no" >&5
 printf '%s\n' "kevent() not available, no" >&6; }
 			TRACEMODE_SUPPORT=0
+		elif test x"$(arch)" == "xarm64" && test "$(sw_vers --productVersion | cut -d. -f1)" -le 14; then
+			# /bin/ln on macOS 14 is built with a set of relocations that break
+			# when binary-patching the architecture from arm64e to arm64,
+			# leading to 'dyld: bad bind opcode 0x19'.
+			#
+			# Newer versions don't seem to ship such binaries, so until
+			# somebody comes along to find a solution for these few binaries,
+			# let's just disable tracemode support on macOS <= 14.
+			{ printf '%s\n' "$as_me:${as_lineno-$LINENO}: result: arm64 on macOS <= 14, no" >&5
+printf '%s\n' "arm64 on macOS <= 14, no" >&6; }
+			TRACEMODE_SUPPORT=0
 		else
 			cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */