build/config/BUILD.gn

# Copyright (c) 2013 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.

import("//build/config/allocator.gni")
import("//build/config/chrome_build.gni")
import("//build/config/features.gni")
import("//build/config/ui.gni")
import("//build/module_args/v8.gni")

declare_args() {
  # When set, turns off the (normally-on) iterator debugging and related stuff
  # that is normally turned on for Debug builds. These are generally useful for
  # catching bugs but in some cases may cause conflicts or excessive slowness.
  disable_iterator_debugging = false

  # Set to true to not store any build metadata, e.g. ifdef out all __DATE__
  # and __TIME__. Set to 0 to reenable the use of these macros in the code
  # base. See http://crbug.com/314403.
  #
  # Continue to embed build meta data in Official builds, basically the
  # time it was built.
  # TODO(maruel): This decision should be revisited because having an
  # official deterministic build has high value too but MSVC toolset can't
  # generate anything deterministic with WPO enabled AFAIK.
  dont_embed_build_metadata = !is_official_build

  # Set to true to enable dcheck in Release builds.
  dcheck_always_on = false

  # Set to true to compile with the OpenGL ES 2.0 conformance tests.
  internal_gles2_conform_tests = false
}

# TODO(brettw) Most of these should be removed. Instead of global feature
# flags, we should have more modular flags that apply only to a target and its
# dependents. For example, depending on the "x11" meta-target should define
# USE_X11 for all dependents so that everything that could use X11 gets the
# define, but anything that doesn't depend on X11 doesn't see it.
#
# For now we define these globally to match the current GYP build.
config("feature_flags") {
  # TODO(brettw) this probably needs to be parameterized.
  defines = [ "V8_DEPRECATION_WARNINGS" ]  # Don't use deprecated V8 APIs anywhere.

  if (dcheck_always_on) {
    defines += [ "DCHECK_ALWAYS_ON=1" ]
  }
  if (use_udev) {
    # TODO(brettw) should probably be "=1".
    defines += [ "USE_UDEV" ]
  }
  if (use_ozone) {
    defines += [ "USE_OZONE=1" ]
  }
  if (use_x11) {
    defines += [ "USE_X11=1" ]
  }
  if (use_allocator != "tcmalloc") {
    defines += [ "NO_TCMALLOC" ]
  }
  if (is_asan || is_lsan || is_tsan || is_msan) {
    defines += [
      "MEMORY_TOOL_REPLACES_ALLOCATOR",
      "MEMORY_SANITIZER_INITIAL_SIZE",
    ]
  }
  if (is_asan) {
    defines += [ "ADDRESS_SANITIZER" ]
  }
  if (is_lsan) {
    defines += [ "LEAK_SANITIZER" ]
  }
  if (is_tsan) {
    defines += [
      "THREAD_SANITIZER",
      "DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL=1",
    ]
  }
  if (is_msan) {
    defines += [ "MEMORY_SANITIZER" ]
  }
  if (!enable_nacl) {
    defines += [ "DISABLE_NACL" ]
  }
  if (v8_use_external_startup_data) {
    defines += [ "V8_USE_EXTERNAL_STARTUP_DATA" ]
  }
  if (is_official_build) {
    defines += [ "OFFICIAL_BUILD" ]
  }
  if (is_chrome_branded) {
    defines += [ "GOOGLE_CHROME_BUILD" ]
  } else {
    defines += [ "CHROMIUM_BUILD" ]
  }
}

# Debug/release ----------------------------------------------------------------

config("debug") {
  defines = [
    "_DEBUG",
    "DYNAMIC_ANNOTATIONS_ENABLED=1",
  ]

  if (is_nacl) {
    defines += [ "DYNAMIC_ANNOTATIONS_PREFIX=NACL_" ]
  }

  if (is_linux && !is_android && current_cpu == "x64" &&
      !disable_iterator_debugging) {
    # Enable libstdc++ debugging facilities to help catch problems early, see
    # http://crbug.com/65151 .
    # TODO(phajdan.jr): Should we enable this for all of POSIX?
    defines += [ "_GLIBCXX_DEBUG=1" ]
  }
}

config("release") {
  defines = [ "NDEBUG" ]

  # Sanitizers.
  # TODO(GYP) The GYP build has "release_valgrind_build == 0" for this
  # condition. When Valgrind is set up, we need to do the same here.
  if (is_tsan) {
    defines += [ "DYNAMIC_ANNOTATIONS_ENABLED=1" ]
  } else {
    defines += [ "NVALGRIND" ]
    if (!is_nacl) {
      # NaCl always enables dynamic annotations. Currently this value is set to
      # 1 for all .nexes.
      defines += [ "DYNAMIC_ANNOTATIONS_ENABLED=0" ]
    }
  }
}

# TODO(vtl): Chromium supports precompiled headers (on a per-target basis), but
# we don't. Stuff from //base depends on this. Add stuff here if we ever want
# precompiled headers.
config("precompiled_headers") {
}

# Default libraries ------------------------------------------------------------

# This config defines the default libraries applied to all targets.
config("default_libs") {
  if (is_android) {
    # Android uses -nostdlib so we need to add even libc here.
    libs = [
      # TODO(brettw) write a version of this, hopefully we can express this
      # without forking out to GCC just to get the library name. The android
      # toolchain directory should probably be extracted into a .gni file that
      # this file and the android toolchain .gn file can share.
      #   # Manually link the libgcc.a that the cross compiler uses.
      #   '<!(<(android_toolchain)/*-gcc -print-libgcc-file-name)',
      "c",
      "dl",
      "m",
    ]
  } else if (is_mac) {
    libs = [
      "AppKit.framework",
      "ApplicationServices.framework",
      "Carbon.framework",
      "CoreFoundation.framework",
      "Foundation.framework",
      "IOKit.framework",
      "Security.framework",
    ]
  } else if (is_ios) {
    libs = [
      "CoreFoundation.framework",
      "CoreGraphics.framework",
      "CoreText.framework",
      "Foundation.framework",
      "UIKit.framework",
    ]
  } else if (is_linux) {
    libs = [ "dl" ]
  }
}