--- base/BUILD.gn.orig	2017-07-25 21:04:48.000000000 +0200
+++ base/BUILD.gn	2017-08-02 22:12:25.442369000 +0200
@@ -1106,7 +1106,7 @@
       "base_paths_win.h",
     ]
 
-    if (is_linux) {
+    if (is_linux || is_bsd) {
       sources += [ "base_paths_posix.cc" ]
     }
   }
@@ -1142,7 +1142,7 @@
   # 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" ]
   }
@@ -1168,7 +1168,7 @@
         "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 += [
@@ -1185,6 +1185,31 @@
     }
   }
 
+  if (is_bsd) {
+    sources -= [
+      "files/file_util_linux.cc",
+      "files/file_path_watcher_linux.cc",
+      "process/process_linux.cc",
+      "process/process_iterator_linux.cc",
+      "process/process_metrics_linux.cc",
+      "process/process_handle_linux.cc",
+      "sys_info_linux.cc",
+    ]
+    sources += [
+      "files/file_path_watcher_stub.cc",
+      "process/process_handle_freebsd.cc",
+      "process/process_iterator_freebsd.cc",
+      "process/process_metrics_freebsd.cc",
+      "sys_info_freebsd.cc",
+    ]
+    libs = [
+      "execinfo", # logging.cc
+      "kvm"       # process_metrics_freebsd
+    ]
+  }
+
+
+
   # Allow more direct string conversions on platforms with native utf8
   # strings
   if (is_mac || is_ios || is_chromeos || is_chromecast) {
@@ -1520,7 +1545,7 @@
   }
 
   # Linux.
-  if (is_linux) {
+  if (is_linux || is_bsd) {
     if (is_asan || is_lsan || is_msan || is_tsan) {
       # For llvm-sanitizer.
       data += [ "//third_party/llvm-build/Release+Asserts/lib/libstdc++.so.6" ]
@@ -1545,7 +1570,7 @@
       "//base/third_party/xdg_user_dirs",
     ]
   } else {
-    # Non-Linux.
+    # Non-Linux/BSD.
     sources -= [
       "nix/mime_util_xdg.cc",
       "nix/mime_util_xdg.h",
@@ -2392,6 +2417,12 @@
       "trace_event/trace_event_android_unittest.cc",
     ]
     set_sources_assignment_filter(sources_assignment_filter)
+  }
+
+  if (is_bsd) {
+    sources -= [
+      "debug/proc_maps_linux_unittest.cc",
+    ]
   }
 
   if (is_win) {