1--- src/3rdparty/chromium/third_party/zlib/BUILD.gn.orig	2025-08-15 18:30:00 UTC
2+++ src/3rdparty/chromium/third_party/zlib/BUILD.gn
3@@ -140,7 +140,7 @@ if (use_arm_neon_optimizations) {
4     defines = [ "CRC32_ARMV8_CRC32" ]
5     if (is_android) {
6       defines += [ "ARMV8_OS_ANDROID" ]
7-    } else if (is_linux || is_chromeos) {
8+    } else if ((is_linux || is_chromeos) && !is_bsd) {
9       defines += [ "ARMV8_OS_LINUX" ]
10     } else if (is_mac) {
11       defines += [ "ARMV8_OS_MACOS" ]
12@@ -150,6 +150,10 @@ if (use_arm_neon_optimizations) {
13       defines += [ "ARMV8_OS_FUCHSIA" ]
14     } else if (is_win) {
15       defines += [ "ARMV8_OS_WINDOWS" ]
16+    } else if (is_openbsd) {
17+      defines += [ "ARMV8_OS_OPENBSD" ]
18+    } else if (is_freebsd) {
19+      defines += [ "ARMV8_OS_FREEBSD" ]
20     } else {
21       assert(false, "Unsupported ARM OS")
22     }
23@@ -467,7 +471,7 @@ static_library("bundled_minizip") {
24     ]
25   }
26
27-  if (is_apple || is_android || is_nacl) {
28+  if (is_apple || is_android || is_nacl || is_bsd) {
29     # Mac, Android and the BSDs don't have fopen64, ftello64, or fseeko64. We
30     # use fopen, ftell, and fseek instead on these systems.
31     defines = [ "USE_FILE32API" ]
32