Only build the x86 arches we actually need.

build/nacl_core_sdk.gyp

 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'includes': [
     'common.gypi',
   ],
   'targets': [
     {
@@ skipping 20 matching lines @@
             '../src/untrusted/irt/irt.gyp:irt_core_nexe',
             '../src/trusted/service_runtime/service_runtime.gyp:sel_ldr',
           ],
         }],
         ['target_arch!="arm" and target_arch!="mipsel"', {
           'dependencies': [
             # these libraries don't currently exist on arm and mips
             '../src/untrusted/valgrind/valgrind.gyp:dynamic_annotations_lib',
             '../src/untrusted/valgrind/valgrind.gyp:valgrind_lib',
           ],
+        }],
+        ['target_arch=="ia32" or (target_arch=="x64" and OS=="win")', {
           'copies': [
             {
               'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/<(OS)_x86/nacl_x86_newlib/x86_64-nacl/lib32',
               'files': [
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/crti.o',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/crtn.o',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libnacl_dyncode.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libnacl_list_mappings.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libnosys.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libpthread.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libvalgrind.a',
               ],
             },
             {
+              'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/<(OS)_x86/nacl_x86_glibc/x86_64-nacl/lib32',
+              'files': [
+                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libnacl_dyncode.a',
+                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libnacl_list_mappings.a',
+                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libvalgrind.a',
+                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libdynamic_annotations.a',
+              ],
+            },
+          ],
+        }],
+        ['(target_arch=="ia32" and OS=="win") or target_arch=="x64"', {
+          'copies': [
+            {
               'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/<(OS)_x86/nacl_x86_newlib/x86_64-nacl/lib',
               'files': [
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/crti.o',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/crtn.o',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/libnacl_dyncode.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/libnacl_list_mappings.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/libnosys.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/libpthread.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib64/libvalgrind.a',
               ],
             },
             {
-              'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/<(OS)_x86/nacl_x86_glibc/x86_64-nacl/lib32',
-              'files': [
-                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libnacl_dyncode.a',
-                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libnacl_list_mappings.a',
-                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libvalgrind.a',
-                '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib32/libdynamic_annotations.a',
-              ],
-            },
-            {
               'destination': '<(SHARED_INTERMEDIATE_DIR)/sdk/<(OS)_x86/nacl_x86_glibc/x86_64-nacl/lib',
               'files': [
                 '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib64/libnacl_dyncode.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib64/libnacl_list_mappings.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib64/libvalgrind.a',
                 '<(SHARED_INTERMEDIATE_DIR)/tc_glibc/lib64/libdynamic_annotations.a',
               ],
             },
           ],
         }],
       ],
     },
   ],
 }