442 строки
13 KiB
Plaintext
442 строки
13 KiB
Plaintext
# Copyright (c) 2013 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# =============================================================================
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# BUILD FLAGS
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# =============================================================================
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#
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# This block lists input arguments to the build, along with their default
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# values. GN requires listing them explicitly so it can validate input and have
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# a central place to manage the build flags.
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#
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# If a value is specified on the command line, it will overwrite the defaults
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# given here, otherwise the default will be injected into the root scope.
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#
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# KEEP IN ALPHABETICAL ORDER and write a good description for everything.
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# Use "is_*" names for intrinsic platform descriptions and build modes, and
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# "use_*" names for optional features libraries, and configurations.
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declare_args() {
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# How many symbols to include in the build. This affects the performance of
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# the build since the symbols are large and dealing with them is slow.
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# 2 means regular build with symbols.
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# 1 means minimal symbols, usually enough for backtraces only.
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# 0 means no symbols.
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symbol_level = 2
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# Component build.
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is_component_build = false
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# Debug build.
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is_debug = true
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# Set to true when compiling with the Clang compiler. Typically this is used
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# to configure warnings.
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is_clang = false
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# ASH is enabled.
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# TODO(brettw) this should be moved out of the main build config file.
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use_ash = false
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# Aura is enabled.
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# TODO(brettw) this should be moved out of the main build config file.
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use_aura = false
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# Ozone is enabled.
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# TODO(brettw) this should be moved out of the main build config file.
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use_ozone = false
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# Forces a 64-bit build on Windows. Does nothing on other platforms. Normally
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# we build 32-bit on Windows regardless of the current host OS bit depth.
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# Setting this flag will override this logic and generate 64-bit toolchains.
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#
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# Normally this would get set automatically when you specify a target using
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# the 64-bit toolchain. You can also set this on the command line to convert
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# the default toolchain to 64-bit.
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force_win64 = false
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# Set to true on the command line when invoked by GYP. Build files can key
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# off of this to make any GYP-output-specific changes to the build.
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is_gyp = false
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# Selects the desired build flavor. Official builds get additional
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# processing to prepare for release. Normally you will want to develop and
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# test with this flag off.
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is_official_build = false
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# Select the desired branding flavor. False means normal Chromium branding,
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# true means official Google Chrome branding (requires extra Google-internal
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# resources).
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is_chrome_branded = false
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# Compile for Address Sanitizer to find memory bugs.
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is_asan = false
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# Compile for Leak Sanitizer to find leaks.
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is_lsan = false
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# Compile for Memory Sanitizer to find uninitialized reads.
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is_msan = false
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# Compile for Thread Sanitizer to find threading bugs.
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is_tsan = false
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}
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# =============================================================================
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# OS DEFINITIONS
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# =============================================================================
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#
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# We set these various is_FOO booleans for convenience in writing OS-based
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# conditions.
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#
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# - is_android, is_chromeos, is_ios, and is_win should be obvious.
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# - is_mac is set only for desktop Mac. It is not set on iOS.
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# - is_posix is true for mac and any Unix-like system (basically everything
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# except Windows).
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# - is_linux is true for any Linux variant including Android and ChromeOS.
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#
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# Do not add more is_* variants here for random lesser-used Unix systems like
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# aix or one of the BSDs. If you need to check these, just check the os value
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# directly.
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if (os == "win") {
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is_android = false
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is_chromeos = false
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is_ios = false
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is_linux = false
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is_mac = false
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is_nacl = false
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is_posix = false
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is_win = true
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# Windows currelty implies Aura.
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use_aura = true
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} else if (os == "mac") {
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is_android = false
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is_chromeos = false
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is_ios = false
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is_linux = false
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is_mac = true
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is_nacl = false
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is_posix = true
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is_win = false
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if (!is_clang) {
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is_clang = true # Always use clang on Mac.
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}
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} else if (os == "android") {
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is_android = true
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is_chromeos = false
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is_ios = false
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is_linux = true
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is_mac = false
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is_nacl = false
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is_posix = true
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is_win = false
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} else if (os == "chromeos") {
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is_android = false
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is_chromeos = true
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is_ios = false
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is_linux = true
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is_mac = false
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is_nacl = false
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is_posix = true
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is_win = false
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} else if (os == "nacl") {
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# os == "nacl" will be passed by the nacl toolchain definition. It is not
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# set by default or on the command line. We treat is as a Posix variant.
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is_android = false
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is_chromeos = false
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is_ios = false
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is_linux = false
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is_mac = false
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is_nacl = true
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is_posix = true
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is_win = false
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} else if (os == "ios") {
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is_android = false
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is_chromeos = false
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is_ios = true
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is_linux = false
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is_mac = false
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is_nacl = false
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is_posix = true
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is_win = false
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} else if (os == "linux") {
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is_android = false
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is_chromeos = false
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is_ios = false
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is_linux = true
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is_mac = false
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is_nacl = false
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is_posix = true
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is_win = false
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}
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# =============================================================================
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# CPU ARCHITECTURE
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# =============================================================================
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if (is_win) {
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# Always use 32-bit on Windows, even when compiling on a 64-bit host OS,
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# unless the override flag is specified.
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if (force_win64) {
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cpu_arch = "x64"
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} else {
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cpu_arch = "x86"
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}
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}
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# =============================================================================
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# SOURCES FILTERS
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# =============================================================================
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#
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# These patterns filter out platform-specific files when assigning to the
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# sources variable. The magic variable |sources_assignment_filter| is applied
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# to each assignment or appending to the sources variable and matches are
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# automatcally removed.
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#
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# We define lists of filters for each platform for all builds so they can
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# be used by individual targets if necessary (a target can always change
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# sources_assignment_filter on itself if it needs something more specific).
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#
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# Note that the patterns are NOT regular expressions. Only "*" and "\b" (path
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# boundary = end of string or slash) are supported, and the entire string
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# muct match the pattern (so you need "*.cc" to match all .cc files, for
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# example).
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windows_sources_filters = [
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"*_win.cc",
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"*_win.h",
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"*_win_unittest.cc",
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"*\bwin/*",
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]
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mac_sources_filters = [
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"*_mac.h",
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"*_mac.cc",
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"*_mac.mm",
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"*_mac_unittest.h",
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"*_mac_unittest.cc",
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"*_mac_unittest.mm",
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"*\bmac/*",
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"*_cocoa.h",
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"*_cocoa.cc",
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"*_cocoa.mm",
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"*_cocoa_unittest.h",
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"*_cocoa_unittest.cc",
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"*_cocoa_unittest.mm",
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"*\bcocoa/*",
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]
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ios_sources_filters = [
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"*_ios.h",
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"*_ios.cc",
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"*_ios.mm",
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"*_ios_unittest.h",
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"*_ios_unittest.cc",
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"*_ios_unittest.mm",
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"*\bios/*",
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]
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objective_c_sources_filters = [
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"*.mm",
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]
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linux_sources_filters = [
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"*_linux.h",
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"*_linux.cc",
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"*_linux_unittest.h",
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"*_linux_unittest.cc",
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"*\blinux/*",
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"*_x11.cc",
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"*_x11.h",
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]
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android_sources_filters = [
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"*_android.h",
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"*_android.cc",
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"*_android_unittest.h",
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"*_android_unittest.cc",
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"*\bandroid/*",
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]
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posix_sources_filters = [
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"*_posix.h",
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"*_posix.cc",
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"*_posix_unittest.h",
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"*_posix_unittest.cc",
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"*\bposix/*",
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]
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# Construct the full list of sources we're using for this platform.
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sources_assignment_filter = []
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if (is_win) {
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sources_assignment_filter += posix_sources_filters
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} else {
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sources_assignment_filter += windows_sources_filters
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}
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if (!is_mac) {
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sources_assignment_filter += mac_sources_filters
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}
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if (!is_ios) {
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sources_assignment_filter += ios_sources_filters
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}
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if (!is_mac && !is_ios) {
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sources_assignment_filter += objective_c_sources_filters
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}
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if (!is_linux) {
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sources_assignment_filter += linux_sources_filters
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}
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if (!is_android) {
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sources_assignment_filter += android_sources_filters
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}
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# This is the actual set.
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set_sources_assignment_filter(sources_assignment_filter)
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# =============================================================================
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# BUILD OPTIONS
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# =============================================================================
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if (is_component_build) {
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component_mode = "shared_library"
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} else {
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component_mode = "static_library"
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}
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# These Sanitizers all imply using the Clang compiler. On Windows they either
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# don't work or work differently.
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if (!is_clang && (is_asan || is_lsan || is_tsan || is_msan)) {
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is_clang = true
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}
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toolkit_uses_gtk = is_linux
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# =============================================================================
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# TARGET DEFAULTS
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# =============================================================================
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#
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# Set up the default configuration for every build target of the given type.
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# The values configured here will be automatically set on the scope of the
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# corresponding target. Target definitions can add or remove to the settings
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# here as needed.
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# Holds all configs used for making native executables and libraries, to avoid
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# duplication in each target below.
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native_compiler_configs = [
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"//build/config:my_msvs", # TODO(brettw) eraseme
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"//build/config/compiler:compiler",
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"//build/config/compiler:chromium_code",
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"//build/config/compiler:default_warnings",
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"//build/config/compiler:no_rtti",
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"//build/config/compiler:runtime_library",
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]
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if (is_win) {
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native_compiler_configs += [
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"//build/config/win:sdk",
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]
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} else if (is_clang) {
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native_compiler_configs += "//build/config/clang:find_bad_constructs"
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}
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# Optimizations and debug checking.
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if (is_debug) {
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native_compiler_configs += "//build/config:debug"
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default_optimization_config = "//build/config/compiler:no_optimize"
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} else {
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native_compiler_configs += "//build/config:release"
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default_optimization_config = "//build/config/compiler:optimize"
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}
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native_compiler_configs += default_optimization_config
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# Symbol setup.
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if (is_clang && (is_linux || is_android)) {
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# Clang creates chubby debug information, which makes linking very slow.
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# For now, don't create debug information with clang.
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# See http://crbug.com/70000
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# TODO(brettw) This just copies GYP. Why not do this on Mac as well?
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default_symbols_config = "//build/config/compiler:no_symbols"
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} else if (symbol_level == 2) {
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default_symbols_config = "//build/config/compiler:symbols"
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} else if (symbol_level == 1) {
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default_symbols_config = "//build/config/compiler:minimal_symbols"
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} else if (symbol_level == 0) {
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default_symbols_config = "//build/config/compiler:no_symbols"
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} else {
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assert(false, "Bad value for symbol_level.")
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}
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native_compiler_configs += default_symbols_config
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# Windows linker setup for EXEs and DLLs.
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if (is_win) {
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if (is_debug) {
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default_incremental_linking_config =
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"//build/config/win:incremental_linking"
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} else {
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default_incremental_linking_config =
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"//build/config/win:no_incremental_linking"
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}
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windows_linker_configs = [
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default_incremental_linking_config,
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"//build/config/win:sdk_link",
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"//build/config/win:common_linker_setup",
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# Default to console-mode apps. Most of our targets are tests and such
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# that shouldn't use the windows subsystem.
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"//build/config/win:console",
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]
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}
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set_defaults("executable") {
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configs = native_compiler_configs
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if (is_win) {
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configs += windows_linker_configs
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} else if (is_mac) {
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configs += "//build/config/mac:mac_dynamic_flags"
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} else if (is_linux) {
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configs += "//build/config/linux:executable_ldconfig"
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}
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}
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set_defaults("static_library") {
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configs = native_compiler_configs
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}
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set_defaults("shared_library") {
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configs = native_compiler_configs
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if (is_win) {
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configs += windows_linker_configs
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} else if (is_mac) {
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configs += "//build/config/mac:mac_dynamic_flags"
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}
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}
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set_defaults("source_set") {
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configs = native_compiler_configs
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}
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# ==============================================================================
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# TOOLCHAIN SETUP
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# ==============================================================================
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#
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# Here we set the default toolchain, as well as the variable host_toolchain
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# which will identify the toolchain corresponding to the local system when
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# doing cross-compiles. When not cross-compiling, this will be the same as the
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# default toolchain.
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if (is_win) {
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# TODO(brettw) name the toolchains the same as cpu_arch as with Linux below
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# to eliminate these conditionals.
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if (build_cpu_arch == "x64") {
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host_toolchain = "//build/toolchain/win:64"
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} else if (build_cpu_arch == "x86") {
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host_toolchain = "//build/toolchain/win:32"
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}
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if (cpu_arch == "x64") {
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set_default_toolchain("//build/toolchain/win:64")
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} else if (cpu_arch == "x86") {
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set_default_toolchain("//build/toolchain/win:32")
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}
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} else if (is_android) {
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host_toolchain = "//build/toolchain/linux:$build_cpu_arch"
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set_default_toolchain("//build/toolchain/android:$cpu_arch")
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} else if (is_linux) {
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host_toolchain = "//build/toolchain/linux:$build_cpu_arch"
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set_default_toolchain("//build/toolchain/linux:$cpu_arch")
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} else if (is_mac || is_ios) {
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host_toolchain = "//build/toolchain/mac:clang"
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set_default_toolchain(host_toolchain)
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}
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