Build PPAPI NaCl Glibc tests with GN

build/toolchain/gcc_toolchain.gni

 # Copyright (c) 2013 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/nacl/config.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/toolchain/toolchain.gni")
 
 # This value will be inherited in the toolchain below.
 concurrent_links = exec_script("get_concurrent_links.py", [], "value")
 
 # This template defines a toolchain for something that works like gcc
 # (including clang).
 #
 # It requires the following variables specifying the executables to run:
@@ skipping 48 matching lines @@
 #
 #  - clear_sanitizers
 #      When set to true, is_asan, is_msan, etc.will all be set to false. Often
 #      secondary toolchains do not want to run with sanitizers.
 #  - is_clang
 #      Whether to use clang instead of gcc.
 #  - is_component_build
 #      Whether to forcibly enable or disable component builds for this
 #      toolchain; if not specified, the toolchain will inherit the
 #      default setting.
+#  - is_nacl_glibc
+#      Whether NaCl code is built using Glibc instead of Newlib.
 template("gcc_toolchain") {
   toolchain(target_name) {
     assert(defined(invoker.cc), "gcc_toolchain() must specify a \"cc\" value")
     assert(defined(invoker.cxx), "gcc_toolchain() must specify a \"cxx\" value")
     assert(defined(invoker.ar), "gcc_toolchain() must specify a \"ar\" value")
     assert(defined(invoker.ld), "gcc_toolchain() must specify a \"ld\" value")
     assert(defined(invoker.toolchain_cpu),
            "gcc_toolchain() must specify a \"toolchain_cpu\"")
     assert(defined(invoker.toolchain_os),
            "gcc_toolchain() must specify a \"toolchain_os\"")
@@ skipping 230 matching lines @@
       current_os = invoker.toolchain_os
 
       # These values need to be passed through unchanged.
       target_os = target_os
       target_cpu = target_cpu
 
       forward_variables_from(invoker,
                              [
                                "is_clang",
                                "is_component_build",
+                               "is_nacl_glibc",
                              ])
 
       if (defined(invoker.clear_sanitizers) && invoker.clear_sanitizers) {
         is_asan = false
         is_cfi = false
         is_lsan = false
         is_msan = false
         is_syzyasan = false
         is_tsan = false
       }
     }
 
     forward_variables_from(invoker, [ "deps" ])
   }
 }