build/config/win/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/win/visual_studio_version.gni")

# Compiler setup for the Windows SDK. Applied to all targets.
config("sdk") {
  # The include path is the stuff returned by the script.
  #include_dirs = msvc_config[0]  TODO(brettw) make this work.

  defines = [
    "_ATL_NO_OPENGL",
    "_WINDOWS",
    "CERT_CHAIN_PARA_HAS_EXTRA_FIELDS",
    "NTDDI_VERSION=0x06030000",
    "PSAPI_VERSION=1",
    "WIN32",
    "_SECURE_ATL",

    # This is required for ATL to use XP-safe versions of its functions.
    "_USING_V110_SDK71_",
  ]
}

# Sets the default Windows build version. This is separated because some
# targets need to manually override it for their compiles.
config("winver") {
  defines = [
    "_WIN32_WINNT=0x0603",
    "WINVER=0x0603",
  ]
}

# Linker flags for Windows SDK setup, this is applied only to EXEs and DLLs.
config("sdk_link") {
  if (current_cpu == "x64") {
    ldflags = [ "/MACHINE:X64" ]
    lib_dirs = [
      "$windows_sdk_path\Lib\winv6.3\um\x64",
      "$visual_studio_path\VC\lib\amd64",
      "$visual_studio_path\VC\atlmfc\lib\amd64",
    ]
  } else {
    ldflags = [
      "/MACHINE:X86",
      "/SAFESEH",  # Not compatible with x64 so use only for x86.
    ]
    lib_dirs = [
      "$windows_sdk_path\Lib\winv6.3\um\x86",
      "$visual_studio_path\VC\lib",
      "$visual_studio_path\VC\atlmfc\lib",
    ]
    if (!is_asan) {
      ldflags += [ "/largeaddressaware" ]
    }
  }
}

# This default linker setup is provided separately from the SDK setup so
# targets who want different library configurations can remove this and specify
# their own.
config("common_linker_setup") {
  ldflags = [
    "/FIXED:NO",
    "/ignore:4199",
    "/ignore:4221",
    "/NXCOMPAT",

    # Suggested by Microsoft Devrel to avoid
    #   LINK : fatal error LNK1248: image size (80000000)
    #   exceeds maximum allowable size (80000000)
    # which started happening more regularly after VS2013 Update 4.
    "/maxilksize:2147483647",
  ]

  # 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.
  if (is_debug) {
    ldflags += [ "/DYNAMICBASE:NO" ]
  } else {
    ldflags += [ "/DYNAMICBASE" ]
  }

  # Delay loaded DLLs.
  ldflags += [
    "/DELAYLOAD:dbghelp.dll",
    "/DELAYLOAD:dwmapi.dll",
    "/DELAYLOAD:shell32.dll",
    "/DELAYLOAD:uxtheme.dll",
  ]
}

# Subsystem --------------------------------------------------------------------

# This is appended to the subsystem to specify a minimum version.
if (current_cpu == "x64") {
  # The number after the comma is the minimum required OS version.
  # 5.02 = Windows Server 2003.
  subsystem_version_suffix = ",5.02"
} else {
  # 5.01 = Windows XP.
  subsystem_version_suffix = ",5.01"
}

config("console") {
  ldflags = [ "/SUBSYSTEM:CONSOLE$subsystem_version_suffix" ]
}
config("windowed") {
  ldflags = [ "/SUBSYSTEM:WINDOWS$subsystem_version_suffix" ]
}

# Incremental linking ----------------------------------------------------------

incremental_linking_on_switch = [ "/INCREMENTAL" ]
incremental_linking_off_switch = [ "/INCREMENTAL:NO" ]
if (is_debug) {
  default_incremental_linking_switch = incremental_linking_on_switch
} else {
  default_incremental_linking_switch = incremental_linking_off_switch
}

# Applies incremental linking or not depending on the current configuration.
config("default_incremental_linking") {
  ldflags = default_incremental_linking_switch
}

# Explicitly on or off incremental linking
config("incremental_linking") {
  ldflags = incremental_linking_on_switch
}
config("no_incremental_linking") {
  ldflags = incremental_linking_off_switch
}

# Some large modules can't handle incremental linking in some situations. This
# config should be applied to large modules to turn off incremental linking
# when it won't work.
config("default_large_module_incremental_linking") {
  if (symbol_level > 0 && (current_cpu == "x86" || !is_component_build)) {
    # When symbols are on, things get so large that the tools fail due to the
    # size of the .ilk files.
    ldflags = incremental_linking_off_switch
  } else {
    # Otherwise just do the default incremental linking for this build type.
    ldflags = default_incremental_linking_switch
  }
}

# Character set ----------------------------------------------------------------

# Not including this config means "ansi" (8-bit system codepage).
config("unicode") {
  defines = [
    "_UNICODE",
    "UNICODE",
  ]
}

# Lean and mean ----------------------------------------------------------------

# Some third party code might not compile with WIN32_LEAN_AND_MEAN so we have
# to have a separate config for it. Remove this config from your target to
# get the "bloaty and accomodating" version of windows.h.
config("lean_and_mean") {
  defines = [ "WIN32_LEAN_AND_MEAN" ]
}

# Nominmax --------------------------------------------------------------------

# Some third party code defines NOMINMAX before including windows.h, which
# then causes warnings when it's been previously defined on the command line.
# For such targets, this config can be removed.

config("nominmax") {
  defines = [ "NOMINMAX" ]
}