Support Visual C++ PGO in Ninja generator

test/win/linker-flags/pgo.gyp

+# Copyright (c) 2013 Google Inc. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'variables': {
+    'pgd_basename': 'test_pgo',
+  },
+  'targets': [
+    # In the PGO (Profile-Guided Optimization) build flow, we need to build the
+    # target binary multiple times. To implement this flow with gyp, here we
+    # define multiple 'executable' targets, each of which represents one build
+    # particular build/profile stage. On tricky part to do this is that these
+    # 'executable' targets should share the code itself so taht profile data

[scottmg, 2013/11/25 15:13:39]

nit; "taht"

[yukawa, 2013/12/03 16:10:41]

Done.

+    # can be reused among these 'executable' files. In other words, the only
+    # differences among below 'executable' targets are:
+    #   1) PGO (Profile-Guided Optimization) database, and
+    #   2) linker options.
+    # The following static library contains all the logic including entry point.
+    # Basically we don't need to rebuild this target once we enter profiling
+    # phase of PGO.
+    {
+      'target_name': 'test_pgo_main',
+      'type': 'static_library',
+      'msvs_settings': {
+        'VCCLCompilerTool': {
+          'WholeProgramOptimization': 'true',  # /GL
+        },
+        'VCLibrarianTool': {
+          'LinkTimeCodeGeneration': 'true',
+        },
+      },
+      'link_settings': {
+        'msvs_settings': {
+          'VCLinkerTool': {
+            'ProfileGuidedDatabase': '$(OutDir)\\<(pgd_basename).pgd',
+            'TargetMachine': '1',  # x86 - 32
+            'SubSystem': '1',      # /SUBSYSTEM:CONSOLE
+            # We need to specify 'libcmt.lib' here so that the linker can pick
+            # up a valid entry point.
+            'AdditionalDependencies': [
+              'libcmt.lib',
+            ],
+          },
+        },
+      },
+      'sources': [
+        'inline_test.h',
+        'inline_test.cc',
+        'inline_test_main.cc',
+      ],
+    },
+    {
+      'target_name': 'test_pgo_instrument',
+      'type': 'executable',
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'LinkTimeCodeGeneration': '2',
+        },
+      },
+      'dependencies': [
+        'test_pgo_main',
+      ],
+    },
+    {
+      'target_name': 'test_pgo_instrument_stub',
+      'type': 'none',
+      'dependencies': [
+        'test_pgo_instrument',
+      ],
+    },
+    {
+      'target_name': 'gen_profile_guided_database',
+      'type': 'none',
+      'msvs_cygwin_shell': 0,
+      'actions': [
+        {
+          'action_name': 'action_main',
+          'inputs': [],
+          'outputs': [
+            '$(OutDir)\\<(pgd_basename).pgd',
+          ],
+          'action': [
+            'python', 'update_pgd.py',
+            '--vcbindir', '$(VCInstallDir)bin',
+            '--exe', '$(OutDir)\\test_pgo_instrument.exe',
+            '--pgd', '$(OutDir)\\<(pgd_basename).pgd',
+          ],
+        },
+      ],
+      'dependencies': [
+        'test_pgo_instrument',
+      ],
+    },
+    {
+      'target_name': 'test_pgo_optimize',
+      'type': 'executable',
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'LinkTimeCodeGeneration': '3',
+        },
+      },
+      'sources': [
+        '$(OutDir)\\<(pgd_basename).pgd',
+      ],
+      'dependencies': [
+        'test_pgo_main',
+        'gen_profile_guided_database',
+      ],
+    },
+    {
+      'target_name': 'test_pgo_update',
+      'type': 'executable',
+      'msvs_settings': {
+        'VCLinkerTool': {
+          'LinkTimeCodeGeneration': '4',
+        },
+      },
+      'sources': [
+        '$(OutDir)\\<(pgd_basename).pgd',
+      ],
+      'dependencies': [
+        'test_pgo_main',
+      ],
+    },
+    # A helper target to dump link.exe's command line options. We can use the
+    # output to determine if PGO (Profile-Guided Optimization) is available on
+    # the test environment.
+    {
+      'target_name': 'gen_linker_option',
+      'type': 'none',
+      'msvs_cygwin_shell': 0,
+      'actions': [
+        {
+          'action_name': 'action_main',
+          'inputs': [],
+          'outputs': [
+            '$(OutDir)\\linker_options.txt',
+          ],
+          'action': [
+            'cmd.exe', '/c link.exe > $(OutDir)\\linker_options.txt & exit 0',
+          ],
+        },
+      ],
+    },
+  ]
+}