Work-around for passing CC/CXX for arm cross-compilation with make.

build/standalone.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 1197 matching lines @@
         ['CC.host', '$(CC)'],
         ['CXX.host', '$(CXX)'],
       ],
     }],
     ['clang==1 and OS=="win"', {
       'make_global_settings': [
         # On Windows, gyp's ninja generator only looks at CC.
         ['CC', '<(clang_dir)/bin/clang-cl'],
       ],
     }],
-    ['OS=="linux" and target_arch=="arm" and host_arch!="arm" and clang==0', {
+    ['OS=="linux" and target_arch=="arm" and host_arch!="arm" and clang==0 and "<(GENERATOR)"=="ninja"', {
       # Set default ARM cross tools on linux.  These can be overridden
       # using CC,CXX,CC.host and CXX.host environment variables.
       'make_global_settings': [
         ['CC', '<!(which arm-linux-gnueabihf-gcc)'],
         ['CXX', '<!(which arm-linux-gnueabihf-g++)'],
         ['CC.host', '<(host_cc)'],
         ['CXX.host', '<(host_cxx)'],
       ],
     }],
     # TODO(yyanagisawa): supports GENERATOR==make
@@ skipping 104 matching lines @@
               '-fsanitize=cfi-vcall',
               '-fsanitize=cfi-derived-cast',
               '-fsanitize=cfi-unrelated-cast',
             ],
           }],
         ],
       },
     }],
   ],
 }