--- build/config/compiler/BUILD.gn.orig	2019-12-12 12:38:59 UTC
+++ build/config/compiler/BUILD.gn
@@ -57,7 +57,7 @@ declare_args() {
   # only two architectures that are currently checked in). Turn this off when
   # you are using a custom toolchain and need to control -B in cflags.
   linux_use_bundled_binutils =
-      linux_use_bundled_binutils_override && is_linux &&
+      linux_use_bundled_binutils_override && (is_linux && !is_bsd) &&
       (current_cpu == "x64" || current_cpu == "x86")
   binutils_path = rebase_path("//third_party/binutils/Linux_x64/Release/bin",
                               root_build_dir)
@@ -288,7 +288,7 @@ config("compiler") {
 
     # Linker warnings.
     if (fatal_linker_warnings && !(is_chromeos && current_cpu == "arm") &&
-        !is_mac && !is_ios && current_os != "aix") {
+        !is_mac && !is_ios && current_os != "aix" && !is_bsd) {
       # TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
       ldflags += [ "-Wl,--fatal-warnings" ]
     }
@@ -383,7 +383,7 @@ config("compiler") {
 
     # Compiler instrumentation can introduce dependencies in DSOs to symbols in
     # the executable they are loaded into, so they are unresolved at link-time.
-    if (!using_sanitizer) {
+    if (!using_sanitizer && !is_bsd) {
       ldflags += [
         "-Wl,-z,defs",
         "-Wl,--as-needed",
@@ -483,7 +483,7 @@ config("compiler") {
     }
   }
 
-  if (is_clang && !is_nacl && !use_xcode_clang) {
+  if (is_clang && !is_nacl && !use_xcode_clang && !is_bsd) {
     cflags += [ "-fcrash-diagnostics-dir=" +
                 rebase_path("//tools/clang/crashreports", root_build_dir) ]
 
@@ -753,7 +753,7 @@ config("compiler_cpu_abi") {
         cflags += [ "-mtune=$arm_tune" ]
       }
     } else if (current_cpu == "arm64") {
-      if (is_clang && !is_android && !is_nacl && !is_fuchsia) {
+      if (is_clang && !is_android && !is_nacl && !is_fuchsia && !is_bsd) {
         cflags += [ "--target=aarch64-linux-gnu" ]
         ldflags += [ "--target=aarch64-linux-gnu" ]
       }
@@ -1104,7 +1104,7 @@ config("compiler_deterministic") {
       "-Xclang",
       ".",
     ]
-    if (!is_win) {
+    if (!is_win && !is_bsd) {
       # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167)
       asmflags = [ "-Wa,-fdebug-compilation-dir,." ]
     }
@@ -1493,7 +1493,7 @@ config("default_warnings") {
         cflags += [ "-Wno-nonportable-include-path" ]
       }
 
-      if (current_toolchain == host_toolchain || !use_xcode_clang) {
+      if ((current_toolchain == host_toolchain || !use_xcode_clang) && !is_bsd) {
         # Flags NaCl (Clang 3.7) and Xcode 9.2 (Clang clang-900.0.39.2) do not
         # recognize.
         cflags += [
@@ -1722,7 +1722,7 @@ config("thin_archive") {
   # Mac and iOS use the mac-specific "libtool" command, not ar, which doesn't
   # have a "thin archive" mode (it does accept -T, but it means truncating
   # archive names to 16 characters, which is not what we want).
-  if ((is_posix && !is_nacl && !is_mac && !is_ios) || is_fuchsia) {
+  if ((is_posix && !is_nacl && !is_mac && !is_ios && !is_bsd) || is_fuchsia) {
     arflags = [ "-T" ]
   } else if (is_win && use_lld) {
     arflags = [ "/llvmlibthin" ]
@@ -2292,7 +2292,7 @@ config("symbols") {
     # flag, so we can use use -g1 for pnacl and nacl-clang compiles.
     # gcc nacl is is_nacl && !is_clang, pnacl and nacl-clang are && is_clang.
     if (!is_nacl || is_clang) {
-      cflags += [ "-g2" ]
+      cflags += [ "-g0" ]
     }
 
     if (use_debug_fission && !is_nacl && !is_android) {
@@ -2313,7 +2313,7 @@ config("symbols") {
     # DWARF info may be corrupt; offsets in a range list entry are in different
     # sections" there.  Maybe just a bug in nacl_switch_32.S.
     if (!is_mac && !is_ios && !is_nacl && current_cpu != "x86" &&
-        (use_gold || use_lld)) {
+        (use_gold || use_lld) && !is_bsd) {
       if (is_clang) {
         # This flag enables the GNU-format pubnames and pubtypes sections,
         # which lld needs in order to generate a correct GDB index.