--- base/BUILD.gn.orig	2019-03-11 22:00:51 UTC
+++ base/BUILD.gn
@@ -1185,7 +1185,7 @@ jumbo_component("base") {
   # Needed for <atomic> if using newer C++ library than sysroot, except if
   # building inside the cros_sdk environment - use host_toolchain as a
   # more robust check for this.
-  if (!use_sysroot && (is_android || (is_linux && !is_chromecast)) &&
+  if (!use_sysroot && (is_android || (is_linux && !is_chromecast) && !is_clang) &&
       host_toolchain != "//build/toolchain/cros:host") {
     libs += [ "atomic" ]
   }
@@ -1211,7 +1211,7 @@ jumbo_component("base") {
         "allocator/allocator_shim_override_glibc_weak_symbols.h",
       ]
       deps += [ "//base/allocator:tcmalloc" ]
-    } else if (is_linux && use_allocator == "none") {
+    } else if ((is_linux && !is_bsd) && use_allocator == "none") {
       sources += [ "allocator/allocator_shim_default_dispatch_to_glibc.cc" ]
     } else if (is_android && use_allocator == "none") {
       sources += [
@@ -1751,6 +1751,33 @@ jumbo_component("base") {
     }
   }
 
+  if (is_bsd) {
+    sources -= [
+      "files/file_path_watcher_linux.cc",
+      "files/file_util_linux.cc",
+      "process/memory_linux.cc",
+      "process/process_handle_linux.cc",
+      "process/process_iterator_linux.cc",
+      "process/process_metrics_linux.cc",
+      "system/sys_info_linux.cc"
+    ]
+    sources += [
+      "files/file_path_watcher_kqueue.cc",
+      "files/file_path_watcher_kqueue.h",
+      "files/file_path_watcher_stub.cc",
+      "process/memory_stubs.cc",
+      "process/process_handle_freebsd.cc",
+      "process/process_iterator_freebsd.cc",
+      "process/process_metrics_freebsd.cc",
+      "system/sys_info_freebsd.cc",
+    ]
+    libs = [
+      "execinfo", # logging.cc
+      "kvm",      # process_metrics_freebsd
+      "util"      # process_metrics_freebsd
+    ]
+  }
+
   # iOS
   if (is_ios) {
     set_sources_assignment_filter([])
@@ -2808,6 +2835,12 @@ test("base_unittests") {
     ]
     set_sources_assignment_filter(sources_assignment_filter)
   }
+
+  if (is_bsd) {
+    sources -= [
+      "debug/proc_maps_linux_unittest.cc",
+    ]
+  } 
 
   if (is_win) {
     deps += [ "//base:scoped_handle_test_dll" ]