Add fnl build target

third_party/mesa/BUILD.gn

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/ui.gni")
+if (is_posix) {

[viettrungluu, 2015/09/15 23:48:23]

&& !is_clang?

Or maybe even just |if (!is_clang)|?

[cdotstout, 2015/09/16 22:01:00]

Copied this from build/config/compiler/BUILD.gn so it should probably be changed
in both places.

+  import("//build/config/gcc/gcc_version.gni")
+}
 
 config("mesa_headers_config") {
   include_dirs = [ "src/include" ]
   if (use_x11) {
     defines = [ "MESA_EGL_NO_X11_HEADERS" ]
   }
 }
 
 # This directory contains checked-in files generated from the Mesa build.
 generated_src_dir = "src/chromium_gensrc"
@@ skipping 57 matching lines @@
     "src/src/mesa/main",
     "src/include",
     "$generated_src_dir/mesa/",
     "$generated_src_dir/mesa/main",
     "$generated_src_dir/mesa/program",
     "$generated_src_dir/mesa/glapi",
   ]
 
   if (is_clang) {
     cflags += [ "-Wno-tautological-constant-out-of-range-compare" ]
+  } else if (gcc_version >= 48) {
+    cflags += [ "-Wno-narrowing" ]
   }
 
   if (is_android) {
     defines += [
       "__GLIBC__",
       "_GNU_SOURCE",
     ]
   }
 
   if (is_linux) {
@@ skipping 594 matching lines @@
         "KEYWORD2=GLAPIENTRY",
       ]
     }
   }
 } else {
   #  Placeholder to allow targets to unconditionally depend on this.
   group("osmesa") {
   }
 }  # !is_android
 # TODO(GYP) Android osmesa_in_lib_dir target.