[MIPS] Set make_global_settings correctly for MIPS-Linux

build/toolchain/linux/BUILD.gn

 # Copyright 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("../clang.gni")
 import("../goma.gni")
 import("../gcc_toolchain.gni")
+import("//build/config/sysroot.gni")
 
 if (is_gyp) {
   # Set the compilers for GYP to use. This logic is only relevant to GYP where
   # there is "a" target compiler. In native GN builds, we have separate
   # compilers for the toolchains below, any or all of which could be active in
   # any given build.
   if (is_clang) {
     # Set the GYP header for all toolchains when running under Clang.
     make_global_settings = make_clang_global_settings
   } else {
-    make_global_settings = ""
+    if (cpu_arch == "mipsel") {
+      make_global_settings =
+        "['CC', '$sysroot/../bin/mipsel-linux-gnu-gcc']," +
+        "['CXX', '$sysroot/../bin/mipsel-linux-gnu-g++']," +
+        "['CC.host', '/usr/bin/gcc']," +
+        "['CXX.host', '/usr/bin/g++'],"
+    } else {
+      make_global_settings = ""
+    }
   }
 
   if (use_goma) {
     # There is a TODO(yyanagisawa) in common.gypi about the make generator not
     # supporting CC_wrapper without CC. As a result, we must add a condition
     # when on the generator when we're not explicitly setting the variables
     # above (which happens when gyp_header is empty at this point).
     #
     # GYP will interpret the file once for each generator, so we have to write
     # this condition into the GYP file since the user could have more than one
@@ skipping 47 matching lines @@
 
 gcc_toolchain("mipsel") {
   cc = "mipsel-linux-gnu-gcc"
   cxx = "mipsel-linux-gnu-g++"
   ar = "mipsel-linux-gnu-ar"
   ld = cxx
 
   toolchain_cpu_arch = "mipsel"
   toolchain_os = "linux"
 }