mirror of
https://bitbucket.org/chromiumembedded/cef
synced 2024-12-29 11:02:11 +01:00
a94e113410
When building on an ARM64 host the ARM64 configs (arm64) will be generated by default and the AMD64 configs (x86,x64) will only be generated if the CEF_ENABLE_AMD64=1 env variable is set. When building on an AMD64 host the AMD64 configs (x86,x64) will be generated by default and the ARM64 configs (arm64) will only be generated if the CEF_ENABLE_ARM64=1 env variable is set.
619 lines
21 KiB
Python
619 lines
21 KiB
Python
# Copyright 2016 The Chromium Embedded Framework Authors. Portions copyright
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# 2012 Google Inc. All rights reserved. Use of this source code is governed by
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# a BSD-style license that can be found in the LICENSE file.
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# This script determines the contents of the per-configuration `args.gn` files
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# that are used to build CEF/Chromium with GN. See comments in CEF's top-level
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# BUILD.gn file for general GN usage instructions.
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#
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# This script performs the following tasks:
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#
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# - Defines CEF's default and required arg values in cases where they differ
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# from Chromium's.
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# - Accepts user-defined arg values via the GN_DEFINES environment variable.
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# - Verifies that user-defined arg values do not conflict with CEF's
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# requirements.
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# - Generates multiple configurations by combining user-defined arg values with
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# CEF's default and required values.
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#
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# Before adding a new arg value in this script determine the following:
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#
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# - Chromium's default value. Default values are defined in the declare_args()
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# sections of *.gni files.
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# - Chromium's value requirements. Check for assert()s related to the value in
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# Chromium code.
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# - Whether a particular value is optional or required for CEF.
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# - Under what conditions a particular value is required for CEF (platform,
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# build type, CPU architecture, etc).
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#
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# If CEF can use Chromium's default value and has no additional validation
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# requirements then do nothing.
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#
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# If CEF can use Chromium's default value but would like to enforce additional
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# validation requirements then go to 3B.
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#
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# If CEF cannot or should not use Chromium's default value then choose one of
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# the following:
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#
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# 1. If CEF requires a different value either globally or based on the platform:
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# - Add an assert() for the value in CEF's top-level BUILD.gn file.
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# - Add the required value in GetRequiredArgs().
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# - Result: CEF's required value will be used. The user cannot override the
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# value via GN_DEFINES.
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#
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# 2. If CEF requires a different value based on the build type or CPU
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# architecture:
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# - Add an assert() for the value in CEF's top-level BUILD.gn file.
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# - Add the required value in GetConfigArgs().
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# - Result: CEF's required value will be used. The user cannot override the
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# value via GN_DEFINES.
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#
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# 3. If CEF recommends (but does not require) a different value either globally
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# or based on the platform:
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# A. Set the default value:
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# - Add the recommended value in GetRecommendedDefaultArgs().
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# - Result: CEF's recommended value will be used by default. The user can
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# override the value via GN_DEFINES.
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#
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# B. If CEF has additional validation requirements:
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# - Add the default Chromium value in GetChromiumDefaultArgs().
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# - Perform validation in ValidateArgs().
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# - Result: An AssertionError will be thrown if validation fails.
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from __future__ import absolute_import
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from __future__ import print_function
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import os
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import platform as python_platform
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import shlex
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import sys
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# The CEF directory is the parent directory of _this_ script.
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cef_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
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# The src directory is the parent directory of the CEF directory.
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src_dir = os.path.abspath(os.path.join(cef_dir, os.pardir))
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# Determine the platform.
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if sys.platform == 'win32':
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platform = 'windows'
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# Windows machines report 'ARM64' or 'AMD64'.
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machine = 'arm64' if python_platform.machine() == 'ARM64' else 'amd64'
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elif sys.platform == 'darwin':
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platform = 'mac'
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# Mac machines report 'arm64' or 'x86_64'.
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machine = 'arm64' if python_platform.machine() == 'arm64' else 'amd64'
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elif sys.platform.startswith('linux'):
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platform = 'linux'
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else:
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print('Unknown operating system platform')
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sys.exit()
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def msg(msg):
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print('NOTE: ' + msg)
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def NameValueListToDict(name_value_list):
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"""
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Takes an array of strings of the form 'NAME=VALUE' and creates a dictionary
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of the pairs. If a string is simply NAME, then the value in the dictionary
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is set to True. If VALUE can be converted to a boolean or integer, it is.
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"""
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result = {}
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for item in name_value_list:
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tokens = item.split('=', 1)
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if len(tokens) == 2:
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token_value = tokens[1]
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if token_value.lower() == 'true':
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token_value = True
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elif token_value.lower() == 'false':
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token_value = False
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else:
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# If we can make it an int, use that, otherwise, use the string.
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try:
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token_value = int(token_value)
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except ValueError:
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pass
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# Set the variable to the supplied value.
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result[tokens[0]] = token_value
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else:
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# No value supplied, treat it as a boolean and set it.
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result[tokens[0]] = True
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return result
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def ShlexEnv(env_name):
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"""
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Split an environment variable using shell-like syntax.
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"""
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flags = os.environ.get(env_name, [])
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if flags:
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flags = shlex.split(flags)
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return flags
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def MergeDicts(*dict_args):
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"""
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Given any number of dicts, shallow copy and merge into a new dict.
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Precedence goes to key value pairs in latter dicts.
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"""
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result = {}
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for dictionary in dict_args:
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result.update(dictionary)
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return result
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def GetValueString(val):
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"""
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Return the string representation of |val| expected by GN.
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"""
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if isinstance(val, bool):
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if val:
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return 'true'
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else:
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return 'false'
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elif isinstance(val, int):
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return val
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else:
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return '"%s"' % val
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return val
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def GetChromiumDefaultArgs():
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"""
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Return default GN args. These must match the Chromium defaults.
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Only args that may be retrieved via GetArgValue() need to be specified here.
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"""
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# Search for these values in declare_args() sections of *.gni files to find
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# the defaults.
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defaults = {
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'dcheck_always_on': False,
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'is_asan': False,
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'is_debug': True,
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'is_official_build': False,
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'target_cpu': 'x64',
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}
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if platform == 'linux':
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defaults['use_sysroot'] = True
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if platform == 'windows':
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defaults['is_win_fastlink'] = False
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defaults['visual_studio_path'] = ''
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defaults['visual_studio_version'] = ''
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defaults['visual_studio_runtime_dirs'] = ''
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defaults['windows_sdk_path'] = ''
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return defaults
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def GetArgValue(args, key):
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"""
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Return an existing GN arg value or the Chromium default.
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"""
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defaults = GetChromiumDefaultArgs()
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assert key in defaults, "No default Chromium value specified for %s" % key
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return args.get(key, defaults[key])
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def GetRecommendedDefaultArgs():
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"""
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Return recommended default GN args that differ from Chromium defaults.
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"""
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# Search for these values in declare_args() sections of *.gni files to find
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# the defaults.
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result = {
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# Enable NaCL. Default is true. False is recommended for faster builds.
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'enable_nacl': False,
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# Disable component builds. Default depends on the platform. True results
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# in faster local builds but False is required to create a CEF binary
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# distribution.
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'is_component_build': False,
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# Specify the current PGO phase. Default is 0 (turned off) for normal
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# builds and 2 (used during the optimization phase) for official Windows
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# and macOS builds. Currently turned off for CEF because it requires
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# additional setup and is not yet tested. See issue #2956.
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'chrome_pgo_phase': 0,
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# Disable support for background apps, which don't make sense with CEF.
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# Default is enabled on desktop platforms. This feature was also causing
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# strange shutdown crashes when using the Chrome runtime with a Debug
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# component build on Windows.
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'enable_background_mode': False,
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# Disable support for resource allowlist generation. When enabled this
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# introduces a Windows official build dependency on the
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# "//chrome:chrome_dll" target, which will fail to build with CEF.
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'enable_resource_allowlist_generation': False,
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}
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if platform != 'windows':
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# Only allow non-component Debug builds on non-Windows platforms. These
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# builds will fail on Windows due to linker issues (running out of memory,
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# etc). See https://bitbucket.org/chromiumembedded/cef/issues/2679.
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result['forbid_non_component_debug_builds'] = False
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if platform == 'linux':
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# Use a sysroot environment. Default is true. False is recommended for local
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# builds.
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# Run the following commands to download the sysroot environment:
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# x86 build only: $ export GYP_DEFINES='target_arch=ia32'
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# x86 or x64 build: $ gclient runhooks
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result['use_sysroot'] = False
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# Don't add the `-Wl,--fatal-warnings` linker flag when building on Ubuntu
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# 14 (Trusty) host systems. It results in errors like the following:
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# ld.lld: error: found local symbol '__bss_start' in global part of symbol
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# table in file /usr/lib/x86_64-linux-gnu/libGL.so
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# TODO(cef): Remove this flag once we require a newer host system.
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result['fatal_linker_warnings'] = False
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return result
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def GetGNEnvArgs():
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"""
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Return GN args specified via the GN_DEFINES env variable.
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"""
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return NameValueListToDict(ShlexEnv('GN_DEFINES'))
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def GetRequiredArgs():
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"""
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Return required GN args. Also enforced by assert() in //cef/BUILD.gn.
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"""
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result = {
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# Set ENABLE_PRINTING=1 ENABLE_BASIC_PRINTING=1.
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'enable_basic_printing': True,
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# ENABLE_SERVICE_DISCOVERY=0 for print preview support
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'enable_print_preview': True,
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'optimize_webui': True,
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# Enable support for Widevine CDM.
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'enable_widevine': True,
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# Don't use the chrome style plugin.
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'clang_use_chrome_plugins': False,
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}
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if platform == 'linux':
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# Don't generate Chromium installer packages. This avoids GN dependency
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# errors with CEF (see issue #2301).
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# Due to the way this variable is declared in chrome/installer/BUILD.gn it
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# can't be enforced by assert().
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result['enable_linux_installer'] = False
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return result
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def GetMergedArgs(build_args):
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"""
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Return merged GN args.
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"""
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dict = MergeDicts(GetRecommendedDefaultArgs(), GetGNEnvArgs(), build_args)
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# Verify that the user is not trying to override required args.
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required = GetRequiredArgs()
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for key in required.keys():
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if key in dict:
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assert dict[key] == required[key], \
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"%s=%s is required" % (key, GetValueString(required[key]))
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return MergeDicts(dict, required)
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def ValidateArgs(args):
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"""
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Validate GN arg combinations that we know about. Also provide suggestions
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where appropriate.
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"""
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dcheck_always_on = GetArgValue(args, 'dcheck_always_on')
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is_asan = GetArgValue(args, 'is_asan')
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is_debug = GetArgValue(args, 'is_debug')
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is_official_build = GetArgValue(args, 'is_official_build')
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target_cpu = GetArgValue(args, 'target_cpu')
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if platform == 'linux':
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use_sysroot = GetArgValue(args, 'use_sysroot')
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if platform == 'windows':
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is_win_fastlink = GetArgValue(args, 'is_win_fastlink')
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visual_studio_path = GetArgValue(args, 'visual_studio_path')
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visual_studio_version = GetArgValue(args, 'visual_studio_version')
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visual_studio_runtime_dirs = GetArgValue(args, 'visual_studio_runtime_dirs')
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windows_sdk_path = GetArgValue(args, 'windows_sdk_path')
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# Target CPU architecture.
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# - Windows supports "x86", "x64" and "arm64".
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# - Mac supports "x64" and "arm64".
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# - Linux supports only "x64" unless using a sysroot environment.
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if platform == 'mac':
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assert target_cpu in ('x64', 'arm64'), 'target_cpu must be "x64" or "arm64"'
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elif platform == 'windows':
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assert target_cpu in ('x86', 'x64',
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'arm64'), 'target_cpu must be "x86", "x64" or "arm64"'
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elif platform == 'linux':
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assert target_cpu in (
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'x86', 'x64', 'arm',
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'arm64'), 'target_cpu must be "x86", "x64", "arm" or "arm64"'
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if platform == 'linux':
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if target_cpu == 'x86':
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assert use_sysroot, 'target_cpu="x86" requires use_sysroot=true'
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elif target_cpu == 'arm':
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assert use_sysroot, 'target_cpu="arm" requires use_sysroot=true'
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elif target_cpu == 'arm64':
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assert use_sysroot, 'target_cpu="arm64" requires use_sysroot=true'
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# ASAN requires Release builds.
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if is_asan:
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assert not is_debug, "is_asan=true requires is_debug=false"
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if not dcheck_always_on:
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msg('is_asan=true recommends dcheck_always_on=true')
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# Official build requires Release builds.
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if is_official_build:
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assert not is_debug, "is_official_build=true requires is_debug=false"
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if platform == 'windows':
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# Official builds should not use /DEBUG:FASTLINK.
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if is_official_build:
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assert not is_win_fastlink, "is_official_build=true precludes is_win_fastlink=true"
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# Windows custom toolchain requirements.
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#
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# Required GN arguments:
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# visual_studio_path="<path to VS root>"
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# The directory that contains Visual Studio. For example, a subset of
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# "C:\Program Files (x86)\Microsoft Visual Studio 14.0".
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# visual_studio_version="<VS version>"
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# The VS version. For example, "2015".
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# visual_studio_runtime_dirs="<path to VS CRT>"
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# The directory that contains the VS CRT. For example, the contents of
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# "C:\Program Files (x86)\Windows Kits\10\Redist\ucrt\DLLs\x64" plus
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# "C:\Windows\System32\ucrtbased.dll"
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# windows_sdk_path="<path to WinSDK>"
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# The directory that contains the Win SDK. For example, a subset of
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# "C:\Program Files (x86)\Windows Kits\10".
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#
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# Required environment variables:
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# DEPOT_TOOLS_WIN_TOOLCHAIN=0
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# GYP_MSVS_OVERRIDE_PATH=<path to VS root, must match visual_studio_path>
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# GYP_MSVS_VERSION=<VS version, must match visual_studio_version>
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# CEF_VCVARS=none
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#
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# Optional environment variables (required if vcvarsall.bat does not exist):
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# INCLUDE=<VS include paths>
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# LIB=<VS library paths>
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# PATH=<VS executable paths>
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#
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# See comments in gclient_hook.py for environment variable usage.
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#
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if visual_studio_path != '':
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assert visual_studio_version != '', 'visual_studio_path requires visual_studio_version'
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assert visual_studio_runtime_dirs != '', 'visual_studio_path requires visual_studio_runtime_dirs'
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assert windows_sdk_path != '', 'visual_studio_path requires windows_sdk_path'
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assert os.environ.get('DEPOT_TOOLS_WIN_TOOLCHAIN', '') == '0', \
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"visual_studio_path requires DEPOT_TOOLS_WIN_TOOLCHAIN=0 env variable"
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msvs_path = os.environ.get('GYP_MSVS_OVERRIDE_PATH', '')
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assert msvs_path == visual_studio_path and os.path.exists(msvs_path), \
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"visual_studio_path requires matching GYP_MSVS_OVERRIDE_PATH env variable"
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msvs_version = os.environ.get('GYP_MSVS_VERSION', '')
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assert msvs_version == visual_studio_version, \
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"visual_studio_version requires matching GYP_MSVS_VERSION env variable"
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assert os.environ.get('CEF_VCVARS', '') == 'none', \
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"visual_studio_path requires CEF_VCVARS=none env variable"
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# If vcvarsall.bat exists then environment variables will be derived from
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# there and any specified INCLUDE/LIB values will be ignored by Chromium
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# (PATH is retained because it might contain required VS runtime
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# libraries). If this file does not exist then the INCLUDE/LIB/PATH values
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# are also required by Chromium.
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vcvars_path = os.path.join(msvs_path, 'VC', 'vcvarsall.bat')
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if not os.path.exists(vcvars_path):
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vcvars_path = os.path.join(msvs_path, 'VC', 'Auxiliary', 'Build',
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'vcvarsall.bat')
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if os.path.exists(vcvars_path):
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if 'INCLUDE' in os.environ:
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del os.environ['INCLUDE']
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if 'LIB' in os.environ:
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del os.environ['LIB']
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if 'LIBPATH' in os.environ:
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del os.environ['LIBPATH']
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else:
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assert 'INCLUDE' in os.environ \
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and 'LIB' in os.environ \
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and 'PATH' in os.environ, \
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"visual_studio_path requires INCLUDE, LIB and PATH env variables"
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def GetConfigArgs(args, is_debug, cpu):
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"""
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Return merged GN args for the configuration and validate.
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"""
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add_args = {}
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# Cannot create is_official_build=true is_debug=true builds.
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# This restriction is enforced in //build/config/BUILDCONFIG.gn.
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# Instead, our "official Debug" build is a Release build with dchecks and
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# symbols. Symbols will be generated by default for official builds; see the
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# definition of 'symbol_level' in //build/config/compiler/compiler.gni.
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if is_debug and GetArgValue(args, 'is_official_build'):
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is_debug = False
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add_args['dcheck_always_on'] = True
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result = MergeDicts(args, add_args, {
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'is_debug': is_debug,
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'target_cpu': cpu,
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})
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if platform == 'linux' and not cpu.startswith('arm'):
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# Remove any arm-related values from non-arm configs.
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for key in result.keys():
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if key.startswith('arm_'):
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del result[key]
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ValidateArgs(result)
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return result
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def GetConfigArgsSandbox(platform, args, is_debug, cpu):
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"""
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Return merged GN args for the cef_sandbox configuration and validate.
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"""
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add_args = {
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# Avoid libucrt.lib linker errors.
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'use_allocator_shim': False,
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|
|
|
# PartitionAlloc is selected as the default allocator in some cases.
|
|
# We can't use it because it requires use_allocator_shim=true.
|
|
'use_allocator': "none",
|
|
|
|
# Avoid /LTCG linker warnings and generate smaller lib files.
|
|
'is_official_build': False,
|
|
|
|
# Enable base target customizations necessary for distribution of the
|
|
# cef_sandbox static library.
|
|
'is_cef_sandbox_build': True,
|
|
}
|
|
|
|
if platform == 'windows':
|
|
# Avoid Debug build linker errors caused by custom libc++.
|
|
add_args['use_custom_libcxx'] = False
|
|
|
|
# Avoid dependency on //third_party/perfetto:libperfetto which fails to
|
|
# build with MSVC libc++.
|
|
add_args['enable_base_tracing'] = False
|
|
|
|
# Don't enable -Wmax-tokens in combination with MSVC libc++.
|
|
add_args['enable_wmax_tokens'] = False
|
|
|
|
# Allow non-component Debug builds for the sandbox.
|
|
add_args['forbid_non_component_debug_builds'] = False
|
|
|
|
result = MergeDicts(args, add_args, {
|
|
'is_debug': is_debug,
|
|
'target_cpu': cpu,
|
|
})
|
|
|
|
ValidateArgs(result)
|
|
return result
|
|
|
|
|
|
def LinuxSysrootExists(cpu):
|
|
"""
|
|
Returns true if the sysroot for the specified |cpu| architecture exists.
|
|
"""
|
|
# Directory that contains sysroots.
|
|
sysroot_root = os.path.join(src_dir, 'build', 'linux')
|
|
# CPU-specific sysroot directory names.
|
|
# Should match the values in build/config/sysroot.gni.
|
|
if cpu == 'x86':
|
|
sysroot_name = 'debian_sid_i386-sysroot'
|
|
elif cpu == 'x64':
|
|
sysroot_name = 'debian_sid_amd64-sysroot'
|
|
elif cpu == 'arm':
|
|
sysroot_name = 'debian_sid_arm-sysroot'
|
|
elif cpu == 'arm64':
|
|
sysroot_name = 'debian_sid_arm64-sysroot'
|
|
else:
|
|
raise Exception('Unrecognized sysroot CPU: %s' % cpu)
|
|
|
|
return os.path.isdir(os.path.join(sysroot_root, sysroot_name))
|
|
|
|
|
|
def GetAllPlatformConfigs(build_args):
|
|
"""
|
|
Return a map of directory name to GN args for the current platform.
|
|
"""
|
|
result = {}
|
|
|
|
# Merged args without validation.
|
|
args = GetMergedArgs(build_args)
|
|
|
|
create_debug = True
|
|
|
|
# Don't create debug directories for asan builds.
|
|
if GetArgValue(args, 'is_asan'):
|
|
create_debug = False
|
|
msg('Not generating Debug configuration due to is_asan=true')
|
|
|
|
supported_cpus = []
|
|
|
|
if platform == 'linux':
|
|
use_sysroot = GetArgValue(args, 'use_sysroot')
|
|
if use_sysroot:
|
|
# Only generate configurations for sysroots that have been installed.
|
|
for cpu in ('x86', 'x64', 'arm', 'arm64'):
|
|
if LinuxSysrootExists(cpu):
|
|
supported_cpus.append(cpu)
|
|
else:
|
|
msg('Not generating %s configuration due to missing sysroot directory'
|
|
% cpu)
|
|
else:
|
|
supported_cpus = ['x64']
|
|
elif platform in ('windows', 'mac'):
|
|
if machine == 'amd64' or os.environ.get('CEF_ENABLE_AMD64', '') == '1':
|
|
supported_cpus.append('x64')
|
|
if platform == 'windows':
|
|
supported_cpus.append('x86')
|
|
if machine == 'arm64' or os.environ.get('CEF_ENABLE_ARM64', '') == '1':
|
|
supported_cpus.append('arm64')
|
|
else:
|
|
raise Exception('Unsupported platform')
|
|
|
|
if len(supported_cpus) == 0:
|
|
raise Exception('No supported architectures')
|
|
|
|
for cpu in supported_cpus:
|
|
if create_debug:
|
|
result['Debug_GN_' + cpu] = GetConfigArgs(args, True, cpu)
|
|
result['Release_GN_' + cpu] = GetConfigArgs(args, False, cpu)
|
|
|
|
if platform in ('windows', 'mac') and GetArgValue(args,
|
|
'is_official_build'):
|
|
# Build cef_sandbox.lib with a different configuration.
|
|
if create_debug:
|
|
result['Debug_GN_' + cpu + '_sandbox'] = GetConfigArgsSandbox(
|
|
platform, args, True, cpu)
|
|
result['Release_GN_' + cpu + '_sandbox'] = GetConfigArgsSandbox(
|
|
platform, args, False, cpu)
|
|
|
|
return result
|
|
|
|
|
|
def GetConfigFileContents(args):
|
|
"""
|
|
Generate config file contents for the arguments.
|
|
"""
|
|
pairs = []
|
|
for k in sorted(args.keys()):
|
|
pairs.append("%s=%s" % (k, GetValueString(args[k])))
|
|
return "\n".join(pairs)
|
|
|
|
|
|
# Program entry point.
|
|
if __name__ == '__main__':
|
|
import sys
|
|
|
|
# Allow override of the platform via the command-line for testing.
|
|
if len(sys.argv) > 1:
|
|
platform = sys.argv[1]
|
|
if not platform in ('linux', 'mac', 'windows'):
|
|
sys.stderr.write('Usage: %s <platform>\n' % sys.argv[0])
|
|
sys.exit()
|
|
|
|
print('Platform: %s' % platform)
|
|
|
|
# Dump the configuration based on platform and environment.
|
|
configs = GetAllPlatformConfigs({})
|
|
for dir, config in configs.items():
|
|
print('\n\nout/%s:\n' % dir)
|
|
print(GetConfigFileContents(config))
|