# Copyright (c) 2012 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.

# IMPORTANT:
# Please don't directly include this file if you are building via gyp_cobalt,
# since gyp_cobalt is automatically forcing its inclusion.
{
  # Variables expected to be overriden in the platform's gyp_configuration.gypi.
  'variables': {
    # Putting a variables dict inside another variables dict looks kind of
    # weird.  This is done so that 'host_arch', 'android_build_type', etc are
    # defined as variables within the outer variables dict here.  This is
    # necessary to get these variables defined for the conditions within this
    # variables dict that operate on these variables.
    'variables': {
      'variables': {
        'variables': {
          'host_arch%':
            '<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/;s/i86pc/ia32/")',
        },

        # Copy conditionally-set variables out one scope.
        'host_arch%': '<(host_arch)',

        # Default architecture we're building for is the architecture we're
        # building on.
        'target_arch%': '<(host_arch)',

        # Sets whether we're building with the Android SDK/NDK (and hence with
        # Ant, value 0), or as part of the Android system (and hence with the
        # Android build system, value 1).
        'android_build_type%': 0,
      },

      # Copy conditionally-set variables out one scope.
      'host_arch%': '<(host_arch)',
      'target_arch%': '<(target_arch)',
      'android_build_type%': '<(android_build_type)',

      # Set to 1 to enable dcheck in release without having to use the flag.
      'dcheck_always_on%': 0,

      # Python version.
      'python_ver%': '2.6',

      # Set ARM-v7 compilation flags
      'armv7%': 0,

      # Set Neon compilation flags (only meaningful if armv7==1).
      'arm_neon%': 1,

      # The system root for cross-compiles. Default: none.
      'sysroot%': '',

      # Use system libjpeg. Note that the system's libjepg will be used even if
      # use_libjpeg_turbo is set.
      'use_system_libjpeg%': 0,

      # Variable 'component' is for cases where we would like to build some
      # components as dynamic shared libraries but still need variable
      # 'library' for static libraries.
      # By default, component is set to whatever library is set to and
      # it can be overriden by the GYP command line or by ~/.gyp/include.gypi.
      'component%': 'static_library',

      # Enable building with ASAN (Clang's -fsanitize=address option).
      # -fsanitize=address only works with clang, but asan=1 implies clang=1
      # See https://sites.google.com/a/chromium.org/dev/developers/testing/addresssanitizer
      'asan%': 0,

      # Enable building with TSAN (Clang's -fsanitize=thread option).
      # -fsanitize=thread only works with clang, but tsan=1 implies clang=1
      # See http://clang.llvm.org/docs/ThreadSanitizer.html
      'tsan%': 0,

      # Use a modified version of Clang to intercept allocated types and sizes
      # for allocated objects. clang_type_profiler=1 implies clang=1.
      # See http://dev.chromium.org/developers/deep-memory-profiler/cpp-object-type-identifier
      # TODO(dmikurube): Support mac.  See http://crbug.com/123758#c11
      'clang_type_profiler%': 0,

      # Set to true to instrument the code with function call logger.
      # See src/third_party/cygprofile/cyg-profile.cc for details.
      'order_profiling%': 0,

      # Set this to true when building with Clang.
      # See http://code.google.com/p/chromium/wiki/Clang for details.
      'clang%': 0,

      # Set to "tsan", "memcheck", or "drmemory" to configure the build to work
      # with one of those tools.
      'build_for_tool%': '',

      'os_posix%': 0,
      'os_bsd%': 0,
    },

    # Make sure that cobalt is defined. This is needed in
    # the case where the code is built using Chromium stock
    # build tools.
    'cobalt%': 0,

    # Copy conditionally-set variables out one scope.
    'target_arch%': '<(target_arch)',
    'host_arch%': '<(host_arch)',
    'library%': 'static_library',
    'os_bsd%': '<(os_bsd)',
    'os_posix%': '<(os_posix)',
    'dcheck_always_on%': '<(dcheck_always_on)',
    'python_ver%': '<(python_ver)',
    'armv7%': '<(armv7)',
    'arm_neon%': '<(arm_neon)',
    'sysroot%': '<(sysroot)',
    'component%': '<(component)',
    'asan%': '<(asan)',
    'tsan%': '<(tsan)',
    'clang_type_profiler%': '<(clang_type_profiler)',
    'order_profiling%': '<(order_profiling)',
    'use_system_libjpeg%': '<(use_system_libjpeg)',
    'android_build_type%': '<(android_build_type)',

    # Use system protobuf instead of bundled one.
    'use_system_protobuf%': 0,

    # TODO(sgk): eliminate this if possible.
    # It would be nicer to support this via a setting in 'target_defaults'
    # in chrome/app/locales/locales.gypi overriding the setting in the
    # 'Debug' configuration in the 'target_defaults' dict below,
    # but that doesn't work as we'd like.
    'msvs_debug_link_incremental%': '2',

    # Clang stuff.
    'clang%': '<(clang)',
    'make_clang_dir%': 'third_party/llvm-build/Release+Asserts',

    # These two variables can be set in GYP_DEFINES while running
    # |gclient runhooks| to let clang run a plugin in every compilation.
    # Only has an effect if 'clang=1' is in GYP_DEFINES as well.
    # Example:
    #     GYP_DEFINES='clang=1 clang_load=/abs/path/to/libPrintFunctionNames.dylib clang_add_plugin=print-fns' gclient runhooks

    'clang_load%': '',
    'clang_add_plugin%': '',

    # Enable sampling based profiler.
    # See http://google-perftools.googlecode.com/svn/trunk/doc/cpuprofile.html
    'profiling%': '0',

    # Set Thumb compilation flags.
    'arm_thumb%': 0,

    # Set ARM fpu compilation flags (only meaningful if armv7==1 and
    # arm_neon==0).
    'arm_fpu%': 'vfpv3',

    # Set ARM float abi compilation flag.
    'arm_float_abi%': 'softfp',

    # .gyp files or targets should set chromium_code to 1 if they build
    # Chromium-specific code, as opposed to external code.  This variable is
    # used to control such things as the set of warnings to enable, and
    # whether warnings are treated as errors.
    'chromium_code%': 0,

    'release_valgrind_build%': 0,

    # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
    'enable_wexit_time_destructors%': 0,

    # Native Client is enabled by default.
    'disable_nacl%': 0,

    # Sets the default version name and code for Android app, by default we
    # do a developer build.
    'android_app_version_name%': 'Developer Build',
    'android_app_version_code%': 0,

    'windows_sdk_path%': 'C:/Program Files (x86)/Windows Kits/10',

    'conditions': [
      ['target_arch=="android"', {
        # Location of Android NDK.
        'variables': {
          'variables': {
            'variables': {
              'android_ndk_root%': '<!(/bin/echo -n $ANDROID_NDK_ROOT)',
            },
            'android_ndk_root%': '<(android_ndk_root)',
            'conditions': [
              ['target_arch == "ia32"', {
                'android_app_abi%': 'x86',
                'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-9/arch-x86',
              }],
              ['target_arch=="arm" or (OS=="lb_shell" and target_arch=="android")', {
                'android_ndk_sysroot%': '<(android_ndk_root)/platforms/android-9/arch-arm',
                'conditions': [
                  ['armv7==0', {
                    'android_app_abi%': 'armeabi',
                  }, {
                    'android_app_abi%': 'armeabi-v7a',
                  }],
                ],
              }],
            ],
          },
          'android_ndk_root%': '<(android_ndk_root)',
          'android_app_abi%': '<(android_app_abi)',
          'android_ndk_sysroot%': '<(android_ndk_sysroot)',
        },
        'android_ndk_root%': '<(android_ndk_root)',
        'android_ndk_sysroot': '<(android_ndk_sysroot)',
        'android_ndk_include': '<(android_ndk_sysroot)/usr/include',
        'android_ndk_lib': '<(android_ndk_sysroot)/usr/lib',
        'android_app_abi%': '<(android_app_abi)',

        # Location of the "strip" binary, used by both gyp and scripts.
        'android_strip%' : '<!(/bin/echo -n <(android_toolchain)/*-strip)',

        # Provides an absolute path to PRODUCT_DIR (e.g. out/Release). Used
        # to specify the output directory for Ant in the Android build.
        'ant_build_out': '`cd <(PRODUCT_DIR) && pwd -P`',

        # Disable Native Client.
        'disable_nacl%': 1,

        # When building as part of the Android system, use system libraries
        # where possible to reduce ROM size.
        # TODO(steveblock): Investigate using the system version of sqlite.
        'use_system_sqlite%': 0,  # '<(android_build_type)',
        'use_system_icu%': '<(android_build_type)',
        'use_system_stlport%': '<(android_build_type)',

        # Copy it out one scope.
        'android_build_type%': '<(android_build_type)',
      }],  # target_arch=="android"

      ['asan==1 and OS!="win"', {
        'clang%': 1,
      }],
      ['tsan==1', {
        'clang%': 1,
      }],

      # On valgrind bots, override the optimizer settings so we don't inline too
      # much and make the stacks harder to figure out.
      #
      # TODO(rnk): Kill off variables that no one else uses and just implement
      # them under a build_for_tool== condition.
      ['build_for_tool=="memcheck" or build_for_tool=="tsan"', {
        # gcc flags
        'mac_debug_optimization': '1',
        'mac_release_optimization': '1',
        'release_optimize': '1',
        'no_gc_sections': 1,
        'debug_extra_cflags': '-g -fno-inline -fno-omit-frame-pointer '
                              '-fno-builtin -fno-optimize-sibling-calls',
        'release_extra_cflags': '-g -fno-inline -fno-omit-frame-pointer '
                                '-fno-builtin -fno-optimize-sibling-calls',

        # MSVS flags for TSan on Pin and Windows.
        'win_debug_RuntimeChecks': '0',
        'win_debug_disable_iterator_debugging': '1',
        'win_debug_Optimization': '1',
        'win_debug_InlineFunctionExpansion': '0',
        'win_release_InlineFunctionExpansion': '0',
        'win_release_OmitFramePointers': '0',

        'linux_use_tcmalloc': 1,
        'release_valgrind_build': 1,
        'werror': '',
        'component': 'static_library',
        'use_system_zlib': 0,
      }],

      # Build tweaks for DrMemory.
      # TODO(rnk): Combine with tsan config to share the builder.
      # http://crbug.com/108155
      ['build_for_tool=="drmemory"', {
        # These runtime checks force initialization of stack vars which blocks
        # DrMemory's uninit detection.
        'win_debug_RuntimeChecks': '0',
        # Iterator debugging is slow.
        'win_debug_disable_iterator_debugging': '1',
        # Try to disable optimizations that mess up stacks in a release build.
        # DrM-i#1054 (http://code.google.com/p/drmemory/issues/detail?id=1054)
        # /O2 and /Ob0 (disable inline) cannot be used together because of a
        # compiler bug, so we use /Ob1 instead.
        'win_release_InlineFunctionExpansion': '1',
        'win_release_OmitFramePointers': '0',
        # Ditto for debug, to support bumping win_debug_Optimization.
        'win_debug_InlineFunctionExpansion': 0,
        'win_debug_OmitFramePointers': 0,
        # Keep the code under #ifndef NVALGRIND.
        'release_valgrind_build': 1,
      }],
    ],
  },
  'target_defaults': {
    'variables': {
      # The condition that operates on chromium_code is in a target_conditions
      # section, and will not have access to the default fallback value of
      # chromium_code at the top of this file, or to the chromium_code
      # variable placed at the root variables scope of .gyp files, because
      # those variables are not set at target scope.  As a workaround,
      # if chromium_code is not set at target scope, define it in target scope
      # to contain whatever value it has during early variable expansion.
      # That's enough to make it available during target conditional
      # processing.
      'chromium_code%': '<(chromium_code)',

      # See http://msdn.microsoft.com/en-us/library/aa652360(VS.71).aspx
      'win_release_Optimization%': '2', # 2 = /Os
      'win_debug_Optimization%': '0',   # 0 = /Od

      # See http://msdn.microsoft.com/en-us/library/2kxx5t2c(v=vs.80).aspx
      # Tri-state: blank is default, 1 on, 0 off
      'win_release_OmitFramePointers%': '0',
      # Tri-state: blank is default, 1 on, 0 off
      'win_debug_OmitFramePointers%': '',

      # See http://msdn.microsoft.com/en-us/library/8wtf2dfz(VS.71).aspx
      'win_debug_RuntimeChecks%': '3',    # 3 = all checks enabled, 0 = off

      # See http://msdn.microsoft.com/en-us/library/47238hez(VS.71).aspx
      'win_debug_InlineFunctionExpansion%': '',    # empty = default, 0 = off,
      'win_release_InlineFunctionExpansion%': '2', # 1 = only __inline, 2 = max

      # VS inserts quite a lot of extra checks to algorithms like
      # std::partial_sort in Debug build which make them O(N^2)
      # instead of O(N*logN). This is particularly slow under memory
      # tools like ThreadSanitizer so we want it to be disablable.
      # See http://msdn.microsoft.com/en-us/library/aa985982(v=VS.80).aspx
      'win_debug_disable_iterator_debugging%': '0',

      'release_extra_cflags%': '',
      'debug_extra_cflags%': '',

      'release_valgrind_build%': '<(release_valgrind_build)',

      # the non-qualified versions are widely assumed to be *nix-only
      'win_release_extra_cflags%': '',
      'win_debug_extra_cflags%': '',

      # TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
      'enable_wexit_time_destructors%': '<(enable_wexit_time_destructors)',

      # Only used by Windows build for now.  Can be used to build into a
      # differet output directory, e.g., a build_dir_prefix of VS2010_ would
      # output files in src/build/VS2010_{Debug,Release}.
      'build_dir_prefix%': '',

      # Targets are by default not nacl untrusted code.
      'nacl_untrusted_build%': 0,

      'pnacl_compile_flags': [
        # pnacl uses the clang compiler so we need to supress all the
        # same warnings as we do for clang.
        # TODO(sbc): Remove these if/when they are removed from the clang
        # build.
        '-Wno-unused-function',
        '-Wno-char-subscripts',
        '-Wno-c++11-extensions',
        '-Wno-unnamed-type-template-args',
      ],

      # See http://msdn.microsoft.com/en-us/library/aa652367.aspx
      'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
      'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)

      # See http://gcc.gnu.org/onlinedocs/gcc-4.4.2/gcc/Optimize-Options.html
      'mac_release_optimization%': '3', # Use -O3 unless overridden
      'mac_debug_optimization%': '0',   # Use -O0 unless overridden
    },
    'defines': [
      'USE_OPENSSL=1',
    ],
    'conditions': [
      ['component=="shared_library"', {
        'defines': ['COMPONENT_BUILD'],
      }],
      ['profiling==1', {
        'defines': ['ENABLE_PROFILING=1'],
      }],
      ['dcheck_always_on!=0', {
        'defines': ['DCHECK_ALWAYS_ON=1'],
      }],  # dcheck_always_on!=0
    ],  # conditions for 'target_defaults'
    'target_conditions': [
      ['enable_wexit_time_destructors==1', {
        'conditions': [
          [ 'clang==1', {
            'cflags': [
              '-Wexit-time-destructors',
            ],
            'xcode_settings': {
              'WARNING_CFLAGS': [
                '-Wexit-time-destructors',
              ],
            },
          }],
        ],
      }],
      ['chromium_code!=0', {
        'includes': [
           # Rules for excluding e.g. foo_win.cc from the build on non-Windows.
          'filename_rules.gypi',
        ],
        # In Chromium code, we define __STDC_foo_MACROS in order to get the
        # C99 macros on Mac and Linux.
        'defines': [
          '__STDC_CONSTANT_MACROS',
          '__STDC_FORMAT_MACROS',
        ],
        'conditions': [
          ['(OS == "win" or target_arch=="xb1") and component=="shared_library"', {
            'msvs_disabled_warnings': [
              4251,  # class 'std::xx' needs to have dll-interface.
            ],
          }],
        ],
      }],
    ],  # target_conditions for 'target_defaults'
    'configurations': {
      # VCLinkerTool LinkIncremental values below:
      #   0 == default
      #   1 == /INCREMENTAL:NO
      #   2 == /INCREMENTAL
      # Debug links incremental, Release does not.
      #
      # Abstract base configurations to cover common attributes.
      #
      'Common_Base': {
        'abstract': 1,
        'msvs_configuration_attributes': {
          'OutputDirectory': '<(DEPTH)\\build\\<(build_dir_prefix)$(ConfigurationName)',
          'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
          'CharacterSet': '1',
        },
      },
      'x86_Base': {
        'abstract': 1,
        'msvs_settings': {
          'VCLinkerTool': {
            'TargetMachine': '1',
          },
        },
        'msvs_configuration_platform': 'Win32',
      },
      'x64_Base': {
        'abstract': 1,
        'msvs_configuration_platform': 'x64',
        'msvs_settings': {
          'VCLinkerTool': {
            'TargetMachine': '17', # x86 - 64
            'AdditionalLibraryDirectories!':
              ['<(windows_sdk_path)/Lib/win8/um/x86'],
            'AdditionalLibraryDirectories':
              ['<(windows_sdk_path)/Lib/win8/um/x64'],
          },
          'VCLibrarianTool': {
            'AdditionalLibraryDirectories!':
              ['<(windows_sdk_path)/Lib/win8/um/x86'],
            'AdditionalLibraryDirectories':
              ['<(windows_sdk_path)/Lib/win8/um/x64'],
          },
        },
        'defines': [
          # Not sure if tcmalloc works on 64-bit Windows.
          'NO_TCMALLOC',
        ],
      },
      'Debug_Base': {
        'abstract': 1,
        'defines': [
          'DYNAMIC_ANNOTATIONS_ENABLED=1',
          'WTF_USE_DYNAMIC_ANNOTATIONS=1',
        ],
        'xcode_settings': {
          'COPY_PHASE_STRIP': 'NO',
          'GCC_OPTIMIZATION_LEVEL': '<(mac_debug_optimization)',
          'OTHER_CFLAGS': [
            '<@(debug_extra_cflags)',
          ],
        },
        'msvs_settings': {
          'VCCLCompilerTool': {
            'Optimization': '<(win_debug_Optimization)',
            'PreprocessorDefinitions': ['_DEBUG'],
            'BasicRuntimeChecks': '<(win_debug_RuntimeChecks)',
            'RuntimeLibrary': '<(win_debug_RuntimeLibrary)',
            'conditions': [
              # According to MSVS, InlineFunctionExpansion=0 means
              # "default inlining", not "/Ob0".
              # Thus, we have to handle InlineFunctionExpansion==0 separately.
              ['win_debug_InlineFunctionExpansion==0', {
                'AdditionalOptions': ['/Ob0'],
              }],
              ['win_debug_InlineFunctionExpansion!=""', {
                'InlineFunctionExpansion':
                  '<(win_debug_InlineFunctionExpansion)',
              }],
              ['win_debug_disable_iterator_debugging==1', {
                'PreprocessorDefinitions': ['_HAS_ITERATOR_DEBUGGING=0'],
              }],

              # if win_debug_OmitFramePointers is blank, leave as default
              ['win_debug_OmitFramePointers==1', {
                'OmitFramePointers': 'true',
              }],
              ['win_debug_OmitFramePointers==0', {
                'OmitFramePointers': 'false',
                # The above is not sufficient (http://crbug.com/106711): it
                # simply eliminates an explicit "/Oy", but both /O2 and /Ox
                # perform FPO regardless, so we must explicitly disable.
                # We still want the false setting above to avoid having
                # "/Oy /Oy-" and warnings about overriding.
                'AdditionalOptions': ['/Oy-'],
              }],
            ],
            'AdditionalOptions': [ '<@(win_debug_extra_cflags)', ],
          },
          'VCLinkerTool': {
            'LinkIncremental': '<(msvs_debug_link_incremental)',
            # ASLR makes debugging with windbg difficult because Chrome.exe and
            # Chrome.dll share the same base name. As result, windbg will
            # name the Chrome.dll module like chrome_<base address>, where
            # <base address> typically changes with each launch. This in turn
            # means that breakpoints in Chrome.dll don't stick from one launch
            # to the next. For this reason, we turn ASLR off in debug builds.
            # Note that this is a three-way bool, where 0 means to pick up
            # the default setting, 1 is off and 2 is on.
            'RandomizedBaseAddress': 1,
          },
          'VCResourceCompilerTool': {
            'PreprocessorDefinitions': ['_DEBUG'],
          },
        },
        'conditions': [
          # Disabled on iOS because it was causing a crash on startup.
          # TODO(michelea): investigate, create a reduced test and possibly
          # submit a radar.
          ['release_valgrind_build==0 and OS!="ios"', {
            'xcode_settings': {
              'OTHER_CFLAGS': [
                '-fstack-protector-all',  # Implies -fstack-protector
              ],
            },
          }],
        ],
      },
      'Release_Base': {
        'abstract': 1,
        'defines': [
          'NDEBUG',
        ],
        'xcode_settings': {
          'DEAD_CODE_STRIPPING': 'YES',  # -Wl,-dead_strip
          'GCC_OPTIMIZATION_LEVEL': '<(mac_release_optimization)',
          'OTHER_CFLAGS': [ '<@(release_extra_cflags)', ],
        },
        'msvs_settings': {
          'VCCLCompilerTool': {
            'RuntimeLibrary': '<(win_release_RuntimeLibrary)',
            'Optimization': '<(win_release_Optimization)',
            'conditions': [
              # According to MSVS, InlineFunctionExpansion=0 means
              # "default inlining", not "/Ob0".
              # Thus, we have to handle InlineFunctionExpansion==0 separately.
              ['win_release_InlineFunctionExpansion==0', {
                'AdditionalOptions': ['/Ob0'],
              }],
              ['win_release_InlineFunctionExpansion!=""', {
                'InlineFunctionExpansion':
                  '<(win_release_InlineFunctionExpansion)',
              }],

              # if win_release_OmitFramePointers is blank, leave as default
              ['win_release_OmitFramePointers==1', {
                'OmitFramePointers': 'true',
              }],
              ['win_release_OmitFramePointers==0', {
                'OmitFramePointers': 'false',
                # The above is not sufficient (http://crbug.com/106711): it
                # simply eliminates an explicit "/Oy", but both /O2 and /Ox
                # perform FPO regardless, so we must explicitly disable.
                # We still want the false setting above to avoid having
                # "/Oy /Oy-" and warnings about overriding.
                'AdditionalOptions': ['/Oy-'],
              }],
            ],
            'AdditionalOptions': [ '<@(win_release_extra_cflags)', ],
          },
          'VCLinkerTool': {
            # LinkIncremental is a tri-state boolean, where 0 means default
            # (i.e., inherit from parent solution), 1 means false, and
            # 2 means true.
            'LinkIncremental': '1',
            # This corresponds to the /PROFILE flag which ensures the PDB
            # file contains FIXUP information (growing the PDB file by about
            # 5%) but does not otherwise alter the output binary. This
            # information is used by the Syzygy optimization tool when
            # decomposing the release image.
            'Profile': 'true',
          },
        },
        'conditions': [
          ['release_valgrind_build==0 and tsan==0', {
            'defines': [
              'NVALGRIND',
              'DYNAMIC_ANNOTATIONS_ENABLED=0',
            ],
          }, {
            'defines': [
              'DYNAMIC_ANNOTATIONS_ENABLED=1',
              'WTF_USE_DYNAMIC_ANNOTATIONS=1',
            ],
          }],
        ],
      },
    },
  },
  'conditions': [
    ['clang==1', {
      'conditions': [
        ['OS=="android"', {
          # Android could use the goma with clang.
          'make_global_settings': [
            ['CC', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang)'],
            ['CXX', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang++)'],
            ['LINK', '<!(/bin/echo -n ${ANDROID_GOMA_WRAPPER} ${CHROME_SRC}/<(make_clang_dir)/bin/clang++)'],
            ['CC.host', '$(CC)'],
            ['CXX.host', '$(CXX)'],
            ['LINK.host', '$(LINK)'],
          ],
        }, {
          'make_global_settings': [
            ['CC', '<(make_clang_dir)/bin/clang'],
            ['CXX', '<(make_clang_dir)/bin/clang++'],
            ['LINK', '$(CXX)'],
            ['CC.host', '$(CC)'],
            ['CXX.host', '$(CXX)'],
            ['LINK.host', '$(LINK)'],
          ],
        }],
      ],
    }],
  ],
  'xcode_settings': {
    # DON'T ADD ANYTHING NEW TO THIS BLOCK UNLESS YOU REALLY REALLY NEED IT!
    # This block adds *project-wide* configuration settings to each project
    # file.  It's almost always wrong to put things here.  Specify your
    # custom xcode_settings in target_defaults to add them to targets instead.

    # The Xcode generator will look for an xcode_settings section at the root
    # of each dict and use it to apply settings on a file-wide basis.  Most
    # settings should not be here, they should be in target-specific
    # xcode_settings sections, or better yet, should use non-Xcode-specific
    # settings in target dicts.  SYMROOT is a special case, because many other
    # Xcode variables depend on it, including variables such as
    # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
    # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
    # files to appear (when present) in the UI as actual files and not red
    # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
    # and therefore SYMROOT, needs to be set at the project level.
    'SYMROOT': '<(DEPTH)/xcodebuild',
  },
}