-- Disable ARM memory tagging in PartitionAlloc on FreeBSD.
-- The build treats FreeBSD as Linux (is_linux), but the MTE code needs Linux-only
-- headers (asm/hwcap.h, sys/prctl.h) that do not exist on FreeBSD.

--- base/allocator/partition_allocator/partition_alloc.gni.orig	2026-09-24 10:00:00 UTC
+++ base/allocator/partition_allocator/partition_alloc.gni
@@ -111,7 +111,8 @@
 use_large_empty_slot_span_ring = true
 
 has_memory_tagging = current_cpu == "arm64" && is_clang && !is_asan &&
-                     !is_hwasan && (is_linux || is_android)
+                     !is_hwasan && (is_linux || is_android) &&
+                     current_os != "freebsd"
 
 declare_args() {
   # Whether PartitionAlloc is built in official mode.