Add a pnacl_irt_shim.gyp to build the pnacl IRT shim with nacl-gcc.

ppapi/pnacl_irt_shim.gyp

Index: ppapi/pnacl_irt_shim.gyp
diff --git a/ppapi/pnacl_irt_shim.gyp b/ppapi/pnacl_irt_shim.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..4033eb28d13800b109fc1a6454e8e15717f87178
--- /dev/null
+++ b/ppapi/pnacl_irt_shim.gyp
@@ -0,0 +1,94 @@
+# Copyright (c) 2011 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.
+
+# This builds the PNaCl IRT shim with nacl-gcc for x64.
+# Since it is built by nacl-gcc, it will be in the nacl-gcc build
+# directory. This means that PNaCl tests will need to pull this build
+# artifact out of the nacl-gcc build directory, and nacl-gcc will need
+# to ignore this build artifact when packaging the nacl-gcc SDK...
+
+# This should not build if 'disable_nacl=1'.
+
+{
+  'variables': {
+    # Define p2p_apis for ppapi_sources.gypi, in case it wasn't already defined.
+    # Somehow other gyp files get away with not defining this.
+    'p2p_apis': 1,
+    'glob_files': [
+       '>(python_exe)', '<(DEPTH)/native_client/build/gyp_glob.py',
+    ],
+  },
+  'includes': [
+    '../native_client/build/common.gypi',
+    'ppapi_sources.gypi',
+  ],
+  'conditions': [
+    # This library is only for x86-64 for now
+    # (the windows build always includes 64-bit).
+    # We may introduce a dummy shim to make it uniform.
+    ['target_arch=="x64" or OS=="win"', {
+      'targets' : [
+        {
+          'target_name': 'shim_generated_source',
+          'type': 'none',
+          'actions' : [
+            {
+              'action_name': 'generate_shim_source',
+              'msvs_cygwin_shell': 0,
+              'description': 'generating the pnacl IRT shim',
+              'inputs': [
+                # Potentially all python scripts in the generators directory.
+                '>!@(<(glob_files) generators/ *.py)',
+                # Potentially all IDL files in the API and DEV-API directory.
+                '>!@(<(glob_files) api/ *.idl)',
+                '>!@(<(glob_files) api/dev/ *.idl)',
+              ],
+              'outputs': [
+                '<(SHARED_INTERMEDIATE_DIR)/pnacl_shim.c',
+              ],
+              'action': [
+                '>(python_exe)',
+                'generators/generator.py',
+                '--srcroot=api',
+                '--wnone',
+                '--pnacl',
+                '--pnaclshim=<(SHARED_INTERMEDIATE_DIR)/pnacl_shim.c',
+              ],
+            },
+          ],
+        },
+        {
+          'target_name': 'pnacl_irt_shim_lib',
+          'type': 'none',
+          'variables': {
+            'nlib_target': 'libpnacl_irt_shim.a',
+            'build_glibc': 1,
+            'build_newlib': 1,
+            'generated_sources': ['<(SHARED_INTERMEDIATE_DIR)/pnacl_shim.c'],
+            'generated_src_deps': [
+              'generators/pnacl_shim.h',
+              # <@(c_sources) will list the checked-in ppapi headers.
+              # TODO(jvoung): If we decide to generate the headers as a
+              # build step, instead of using the checked-in headers, list
+              # that builder as a dependency instead.
+              '<@(c_sources)',
+            ],
+            'sources': [
+              '<(DEPTH)/native_client/src/untrusted/pnacl_irt_shim/shim_entry.c',
+              '<(DEPTH)/native_client/src/untrusted/pnacl_irt_shim/shim_ppapi.c',
+            ],
+            'include_dirs': [
+              '.',
+              './generators',
+            ],
+          },
+          'dependencies': [
+            'shim_generated_source',
+            '<(DEPTH)/native_client/tools.gyp:prep_toolchain',
+          ],
+        },
+      ],
+    }],
+  ],
+}