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# Copyright 2010 Google Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
# * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# IMPORTANT:
# Please don't directly include this file if you are building via gyp_chromium,
# since gyp_chromium is automatically forcing its inclusion.
{
'variables': {
# Variables expected to be overriden on the GYP command line (-D) or by
# ~/.gyp/include.gypi.
# Putting a variables dict inside another variables dict looks kind of
# weird. This is necessary to get these variables defined for the conditions
# within this variables dict that operate on these variables.
'variables': {
'variables': {
# Compute the architecture that we're building on.
'conditions': [
[ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
# This handles the Linux platforms we generally deal with. Anything
# else gets passed through, which probably won't work very well; such
# hosts should pass an explicit target_arch to gyp.
'host_arch%':
'<!(uname -m | sed -e "s/i.86/ia32/;s/x86_64/x64/;s/amd64/x64/;s/arm.*/arm/")',
}, { # OS!="linux"
'host_arch%': 'ia32',
}],
],
},
'host_arch%': '<(host_arch)',
# Default architecture we're building for is the architecture we're
# building on.
'target_arch%': '<(host_arch)',
# This variable tells WebCore.gyp and JavaScriptCore.gyp whether they are
# are built under a chromium full build (1) or a webkit.org chromium
# build (0).
'inside_chromium_build%': 1,
# Set to 1 compile with -fPIC cflag on linux. This is a must for shared
# libraries on linux x86-64 and arm.
'linux_fpic%': 0,
# Python version.
'python_ver%': '2.5',
# Determine ARM compilation flags.
'arm_version%': 7,
# Set Neon compilation flags (only meaningful if arm_version==7).
'arm_neon%': 1,
# The system root for cross-compiles. Default: none.
'sysroot%': '',
# On Linux, we build with sse2 for Chromium builds.
'disable_sse2%': 0,
},
'target_arch%': '<(target_arch)',
'host_arch%': '<(host_arch)',
'inside_chromium_build%': '<(inside_chromium_build)',
'linux_fpic%': '<(linux_fpic)',
'python_ver%': '<(python_ver)',
'arm_version%': '<(arm_version)',
'arm_neon%': '<(arm_neon)',
'sysroot%': '<(sysroot)',
'disable_sse2%': '<(disable_sse2)',
# The release channel that this build targets. This is used to restrict
# channel-specific build options, like which installer packages to create.
# The default is 'all', which does no channel-specific filtering.
'channel%': 'all',
# Override chromium_mac_pch and set it to 0 to suppress the use of
# precompiled headers on the Mac. Prefix header injection may still be
# used, but prefix headers will not be precompiled. This is useful when
# using distcc to distribute a build to compile slaves that don't
# share the same compiler executable as the system driving the compilation,
# because precompiled headers rely on pointers into a specific compiler
# executable's image. Setting this to 0 is needed to use an experimental
# Linux-Mac cross compiler distcc farm.
'chromium_mac_pch%': 1,
# Mac OS X SDK and deployment target support.
# The SDK identifies the version of the system headers that will be used,
# and corresponds to the MAC_OS_X_VERSION_MAX_ALLOWED compile-time macro.
# "Maximum allowed" refers to the operating system version whose APIs are
# available in the headers.
# The deployment target identifies the minimum system version that the
# built products are expected to function on. It corresponds to the
# MAC_OS_X_VERSION_MIN_REQUIRED compile-time macro.
# To ensure these macros are available, #include <AvailabilityMacros.h>.
# Additional documentation on these macros is available at
# Chrome normally builds with the Mac OS X 10.5 SDK and sets the
# deployment target to 10.5. Other projects, such as O3D, may override
# these defaults.
'mac_sdk%': '10.5',
'mac_deployment_target%': '10.5',
# Set to 1 to enable code coverage. In addition to build changes
# (e.g. extra CFLAGS), also creates a new target in the src/chrome
# project file called "coverage".
# Currently ignored on Windows.
'coverage%': 0,
# Although base/allocator lets you select a heap library via an
# environment variable, the libcmt shim it uses sometimes gets in
# the way. To disable it entirely, and switch to normal msvcrt, do e.g.
# 'win_use_allocator_shim': 0,
# 'win_release_RuntimeLibrary': 2
# to ~/.gyp/include.gypi, gclient runhooks --force, and do a release build.
'win_use_allocator_shim%': 1, # 0 = shim allocator via libcmt; 1 = msvcrt
# Whether usage of OpenMAX is enabled.
'enable_openmax%': 0,
# TODO(bradnelson): eliminate this when possible.
# To allow local gyp files to prevent release.vsprops from being included.
# Yes(1) means include release.vsprops.
# Once all vsprops settings are migrated into gyp, this can go away.
'msvs_use_common_release%': 1,
# TODO(bradnelson): eliminate this when possible.
# To allow local gyp files to override additional linker options for msvs.
# Yes(1) means set use the common linker options.
'msvs_use_common_linker_extras%': 1,
# 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',
# This is the location of the sandbox binary. Chrome looks for this before
# running the zygote process. If found, and SUID, it will be used to
# sandbox the zygote process and, thus, all renderer processes.
'linux_sandbox_path%': '',
# Set this to true to enable SELinux support.
'selinux%': 0,
# Strip the binary after dumping symbols.
'linux_strip_binary%': 0,
# Enable TCMalloc.
'linux_use_tcmalloc%': 1,
# Disable TCMalloc's debugallocation.
'linux_use_debugallocation%': 0,
# Disable TCMalloc's heapchecker.
'linux_use_heapchecker%': 0,
# Set to 1 to turn on seccomp sandbox by default.
# (Note: this is ignored for official builds.)
'linux_use_seccomp_sandbox%': 0,
# Set to select the Title Case versions of strings in GRD files.
'use_titlecase_in_grd%': 0,
# Used to disable Native Client at compile time, for platforms where it
# isn't supported
'disable_nacl%': 0,
# Set Thumb compilation flags.
'arm_thumb%': 0,
# Set ARM fpu compilation flags (only meaningful if arm_version==7 and
# arm_neon==0).
'arm_fpu%': 'vfpv3',
# Enable new NPDevice API.
'enable_new_npdevice_api%': 0,
'conditions': [
# Whether to use multiple cores to compile with visual studio. This is
# optional because it sometimes causes corruption on VS 2005.
# It is on by default on VS 2008 and off on VS 2005.
['OS=="win"', {
'conditions': [
['MSVS_VERSION=="2005"', {
'msvs_multi_core_compile%': 0,
},{
'msvs_multi_core_compile%': 1,
}],
# Don't do incremental linking for large modules on 32-bit.
['MSVS_OS_BITS==32', {
'msvs_large_module_debug_link_mode%': '1', # No
},{
'msvs_large_module_debug_link_mode%': '2', # Yes
}],
],
'nacl_win64_defines': [
# This flag is used to minimize dependencies when building
# Native Client loader for 64-bit Windows.
'NACL_WIN64',
],
}],
],
# NOTE: When these end up in the Mac bundle, we need to replace '-' for '_'
'locales': [
'am', 'ar', 'bg', 'bn', 'ca', 'cs', 'da', 'de', 'el', 'en-GB',
'en-US', 'es-419', 'es', 'et', 'fi', 'fil', 'fr', 'gu', 'he',
'hi', 'hr', 'hu', 'id', 'it', 'ja', 'kn', 'ko', 'lt', 'lv',
'ml', 'mr', 'nb', 'nl', 'pl', 'pt-BR', 'pt-PT', 'ro', 'ru',
'sk', 'sl', 'sr', 'sv', 'sw', 'ta', 'te', 'th', 'tr', 'uk',
'vi', 'zh-CN', 'zh-TW',
],
},
'target_defaults': {
'includes': [
'filename_rules.gypi',
],
'variables': {
'mac_release_optimization%': '3', # Use -O3 unless overridden
'mac_debug_optimization%': '0', # Use -O0 unless overridden
'win_release_Optimization%': '2', # 2 = /Os
'win_debug_Optimization%': '0', # 0 = /Od
'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
'win_debug_RuntimeLibrary%': '1', # 1 = /MTd (debug static)
'release_extra_cflags%': '',
'debug_extra_cflags%': '',
'release_valgrind_build%': 0,
},
'conditions': [
['selinux==1', {
'defines': ['CHROMIUM_SELINUX=1'],
}],
['win_use_allocator_shim==0', {
'conditions': [
['OS=="win"', {
'defines': ['NO_TCMALLOC'],
}],
],
}],
['coverage!=0', {
'conditions': [
['OS=="mac"', {
'xcode_settings': {
'GCC_INSTRUMENT_PROGRAM_FLOW_ARCS': 'YES', # -fprofile-arcs
'GCC_GENERATE_TEST_COVERAGE_FILES': 'YES', # -ftest-coverage
},
# Add -lgcov for types executable, shared_library, and
# loadable_module; not for static_library.
# This is a delayed conditional.
'target_conditions': [
['_type!="static_library"', {
'xcode_settings': { 'OTHER_LDFLAGS': [ '-lgcov' ] },
}],
],
}],
# Linux gyp (into scons) doesn't like target_conditions?
# TODO(???): track down why 'target_conditions' doesn't work
# on Linux gyp into scons like it does on Mac gyp into xcodeproj.
['OS=="linux"', {
'cflags': [ '-ftest-coverage',
'-fprofile-arcs' ],
'link_settings': { 'libraries': [ '-lgcov' ] },
}],
# Finally, for Windows, we simply turn on profiling.
['OS=="win"', {
'msvs_settings': {
'VCLinkerTool': {
'Profile': 'true',
},
'VCCLCompilerTool': {
# /Z7, not /Zi, so coverage is happyb
'DebugInformationFormat': '1',
'AdditionalOptions': ['/Yd'],
}
}
}], # OS==win
], # conditions for coverage
}], # coverage!=0
], # conditions for 'target_defaults'
'target_conditions': [
[ 'OS=="linux" or OS=="freebsd" or OS=="openbsd"', {
'cflags!': [
'-Wall',
'-Wextra',
'-Werror',
],
}],
[ 'OS=="win"', {
'defines': [
'_CRT_SECURE_NO_DEPRECATE',
'_CRT_NONSTDC_NO_WARNINGS',
'_CRT_NONSTDC_NO_DEPRECATE',
# This is required for ATL to use XP-safe versions of its functions.
'_USING_V110_SDK71_',
],
'msvs_disabled_warnings': [4800],
'msvs_settings': {
'VCCLCompilerTool': {
'WarnAsError': 'true',
'Detect64BitPortabilityProblems': 'false',
},
},
}],
[ 'OS=="mac"', {
'xcode_settings': {
'GCC_TREAT_WARNINGS_AS_ERRORS': 'NO',
'WARNING_CFLAGS!': ['-Wall'],
},
}],
], # target_conditions for 'target_defaults'
'default_configuration': 'Debug',
'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': '$(SolutionDir)$(ConfigurationName)',
'IntermediateDirectory': '$(OutDir)\\obj\\$(ProjectName)',
'CharacterSet': '1',
},
},
'x86_Base': {
'abstract': 1,
'msvs_settings': {
'VCLinkerTool': {
'MinimumRequiredVersion': '5.01', # XP.
'TargetMachine': '1',
},
},
'msvs_configuration_platform': 'Win32',
},
'x64_Base': {
'abstract': 1,
'msvs_configuration_platform': 'x64',
'msvs_settings': {
'VCLinkerTool': {
'TargetMachine': '17', # x86 - 64
'AdditionalLibraryDirectories!':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
'AdditionalLibraryDirectories':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
},
'VCLibrarianTool': {
'AdditionalLibraryDirectories!':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
'AdditionalLibraryDirectories':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib/x64'],
},
},
'defines': [
# Not sure if tcmalloc works on 64-bit Windows.
'NO_TCMALLOC',
],
},
'Debug_Base': {
'abstract': 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': '3',
'RuntimeLibrary': '<(win_debug_RuntimeLibrary)',
},
'VCLinkerTool': {
'LinkIncremental': '<(msvs_debug_link_incremental)',
},
'VCResourceCompilerTool': {
'PreprocessorDefinitions': ['_DEBUG'],
},
},
'conditions': [
['OS=="linux"', {
'cflags': [
'<@(debug_extra_cflags)',
],
}],
],
},
'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': {
'Optimization': '<(win_release_Optimization)',
'RuntimeLibrary': '<(win_release_RuntimeLibrary)',
},
'VCLinkerTool': {
'LinkIncremental': '1',
},
},
'conditions': [
['release_valgrind_build==0', {
'defines': ['NVALGRIND'],
}],
['win_use_allocator_shim==0', {
'defines': ['NO_TCMALLOC'],
}],
['win_release_RuntimeLibrary==2', {
# Visual C++ 2008 barfs when building anything with /MD (msvcrt):
# VC\include\typeinfo(139) : warning C4275: non dll-interface
# class 'stdext::exception' used as base for dll-interface
# class 'std::bad_cast'
'msvs_disabled_warnings': [4275],
}],
['OS=="linux"', {
'cflags': [
'<@(release_extra_cflags)',
],
}],
],
},
'Purify_Base': {
'abstract': 1,
'defines': [
'PURIFY',
'NO_TCMALLOC',
],
'msvs_settings': {
'VCCLCompilerTool': {
'Optimization': '0',
'RuntimeLibrary': '0',
'BufferSecurityCheck': 'false',
},
'VCLinkerTool': {
'EnableCOMDATFolding': '1',
'LinkIncremental': '1',
},
},
},
#
# Concrete configurations
#
'Debug': {
'inherit_from': ['Common_Base', 'x86_Base', 'Debug_Base'],
},
'Release': {
'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base'],
'conditions': [
['msvs_use_common_release', {
'defines': ['OFFICIAL_BUILD'],
'msvs_settings': {
'VCCLCompilerTool': {
'Optimization': '3',
'StringPooling': 'true',
'OmitFramePointers': 'true',
'InlineFunctionExpansion': '2',
'EnableIntrinsicFunctions': 'true',
'FavorSizeOrSpeed': '2',
'OmitFramePointers': 'true',
'EnableFiberSafeOptimizations': 'true',
'WholeProgramOptimization': 'true',
},
'VCLibrarianTool': {
'AdditionalOptions': ['/ltcg', '/expectedoutputsize:120000000'],
},
'VCLinkerTool': {
'LinkIncremental': '1',
'OptimizeReferences': '2',
'EnableCOMDATFolding': '2',
'OptimizeForWindows98': '1',
'LinkTimeCodeGeneration': '1',
},
},
}],
]
},
'conditions': [
[ 'OS=="win"', {
# TODO(bradnelson): add a gyp mechanism to make this more graceful.
'Purify': {
'inherit_from': ['Common_Base', 'x86_Base', 'Release_Base', 'Purify'],
},
'Debug_x64': {
'inherit_from': ['Common_Base', 'x64_Base', 'Debug_Base'],
},
'Release_x64': {
'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base'],
},
'Purify_x64': {
'inherit_from': ['Common_Base', 'x64_Base', 'Release_Base', 'Purify_Base'],
},
}],
],
},
},
'conditions': [
['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
'target_defaults': {
# Enable -Werror by default, but put it in a variable so it can
# be disabled in ~/.gyp/include.gypi on the valgrind builders.
'variables': {
# Use -fno-strict-aliasing by default since gcc 4.4 has periodic
# issues that slip through the cracks. We could do this just for
# gcc 4.4 but it makes more sense to be consistent on all
# compilers in use. TODO(Craig): turn this off again when
# there is some 4.4 test infrastructure in place and existing
# aliasing issues have been fixed.
'no_strict_aliasing%': 1,
'conditions': [['OS=="linux"', {'werror%': '-Werror',}],
['OS=="freebsd"', {'werror%': '',}],
['OS=="openbsd"', {'werror%': '',}],
],
},
'cflags': [
'<(werror)', # See note above about the werror variable.
'-pthread',
'-fno-exceptions',
'-Wall',
# TODO(evan): turn this back on once all the builds work.
# '-Wextra',
# Don't warn about unused function params. We use those everywhere.
'-Wno-unused-parameter',
# Don't warn about the "struct foo f = {0};" initialization pattern.
'-Wno-missing-field-initializers',
'-D_FILE_OFFSET_BITS=64',
# Don't export any symbols (for example, to plugins we dlopen()).
# Note: this is *required* to make some plugins work.
'-fvisibility=hidden',
],
'cflags_cc': [
'-frtti',
'-fno-threadsafe-statics',
# Make inline functions have hidden visiblity by default.
# Surprisingly, not covered by -fvisibility=hidden.
'-fvisibility-inlines-hidden',
],
'ldflags': [
'-pthread', '-Wl,-z,noexecstack',
],
'scons_variable_settings': {
'LIBPATH': ['$LIB_DIR'],
# Linking of large files uses lots of RAM, so serialize links
# using the handy flock command from util-linux.
'FLOCK_LINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$LINK'],
'FLOCK_SHLINK': ['flock', '$TOP_BUILDDIR/linker.lock', '$SHLINK'],
'FLOCK_LDMODULE': ['flock', '$TOP_BUILDDIR/linker.lock', '$LDMODULE'],
# We have several cases where archives depend on each other in
# a cyclic fashion. Since the GNU linker does only a single
# pass over the archives we surround the libraries with
# --start-group and --end-group (aka -( and -) ). That causes
# ld to loop over the group until no more undefined symbols
# are found. In an ideal world we would only make groups from
# those libraries which we knew to be in cycles. However,
# that's tough with SCons, so we bodge it by making all the
# archives a group by redefining the linking command here.
#
# TODO: investigate whether we still have cycles that
# require --{start,end}-group. There has been a lot of
# refactoring since this was first coded, which might have
# eliminated the circular dependencies.
#
# Note: $_LIBDIRFLAGS comes before ${LINK,SHLINK,LDMODULE}FLAGS
# so that we prefer our own built libraries (e.g. -lpng) to
# system versions of libraries that pkg-config might turn up.
# TODO(sgk): investigate handling this not by re-ordering the
# flags this way, but by adding a hook to use the SCons
# ParseFlags() option on the output from pkg-config.
'LINKCOM': [['$FLOCK_LINK', '-o', '$TARGET',
'$_LIBDIRFLAGS', '$LINKFLAGS', '$SOURCES',
'-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
'SHLINKCOM': [['$FLOCK_SHLINK', '-o', '$TARGET',
'$_LIBDIRFLAGS', '$SHLINKFLAGS', '$SOURCES',
'-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
'LDMODULECOM': [['$FLOCK_LDMODULE', '-o', '$TARGET',
'$_LIBDIRFLAGS', '$LDMODULEFLAGS', '$SOURCES',
'-Wl,--start-group', '$_LIBFLAGS', '-Wl,--end-group']],
'IMPLICIT_COMMAND_DEPENDENCIES': 0,
},
'scons_import_variables': [
'AS',
'CC',
'CXX',
'LINK',
],
'scons_propagate_variables': [
'AS',
'CC',
'CCACHE_DIR',
'CXX',
'DISTCC_DIR',
'DISTCC_HOSTS',
'HOME',
'INCLUDE_SERVER_ARGS',
'INCLUDE_SERVER_PORT',
'LINK',
'CHROME_BUILD_TYPE',
'CHROMIUM_BUILD',
'OFFICIAL_BUILD',
],
'configurations': {
'Debug_Base': {
'variables': {
'debug_optimize%': '0',
},
'defines': [
'_DEBUG',
],
'cflags': [
'-O>(debug_optimize)',
'-g',
# One can use '-gstabs' to enable building the debugging
# information in STABS format for breakpad's dumpsyms.
],
'ldflags': [
'-rdynamic', # Allows backtrace to resolve symbols.
],
},
'Release_Base': {
'variables': {
'release_optimize%': '2',
},
'cflags': [
'-O>(release_optimize)',
# Don't emit the GCC version ident directives, they just end up
# in the .comment section taking up binary size.
'-fno-ident',
# Put data and code in their own sections, so that unused symbols
# can be removed at link time with --gc-sections.
'-fdata-sections',
'-ffunction-sections',
],
'ldflags': [
'-Wl,--gc-sections',
],
},
},
'variants': {
'coverage': {
'cflags': ['-fprofile-arcs', '-ftest-coverage'],
'ldflags': ['-fprofile-arcs'],
},
'profile': {
'cflags': ['-pg', '-g'],
'ldflags': ['-pg'],
},
'symbols': {
'cflags': ['-g'],
},
},
'conditions': [
[ 'target_arch=="ia32"', {
'asflags': [
# Needed so that libs with .s files (e.g. libicudata.a)
# are compatible with the general 32-bit-ness.
'-32',
],
# All floating-point computations on x87 happens in 80-bit
# precision. Because the C and C++ language standards allow
# the compiler to keep the floating-point values in higher
# precision than what's specified in the source and doing so
# is more efficient than constantly rounding up to 64-bit or
# 32-bit precision as specified in the source, the compiler,
# especially in the optimized mode, tries very hard to keep
# values in x87 floating-point stack (in 80-bit precision)
# as long as possible. This has important side effects, that
# the real value used in computation may change depending on
# how the compiler did the optimization - that is, the value
# kept in 80-bit is different than the value rounded down to
# 64-bit or 32-bit. There are possible compiler options to make
# this behavior consistent (e.g. -ffloat-store would keep all
# floating-values in the memory, thus force them to be rounded
# to its original precision) but they have significant runtime
# performance penalty.
#
# -mfpmath=sse -msse2 makes the compiler use SSE instructions
# which keep floating-point values in SSE registers in its
# native precision (32-bit for single precision, and 64-bit for
# double precision values). This means the floating-point value
# used during computation does not change depending on how the
# compiler optimized the code, since the value is always kept
# in its specified precision.
'conditions': [
['disable_sse2==0', {
'cflags': [
'-march=pentium4',
'-msse2',
'-mfpmath=sse',
],
}],
],
# -mmmx allows mmintrin.h to be used for mmx intrinsics.
# video playback is mmx and sse2 optimized.
'cflags': [
'-m32',
'-mmmx',
],
'ldflags': [
'-m32',
],
}],
['target_arch=="arm"', {
'target_conditions': [
['_toolset=="target"', {
'cflags_cc': [
# The codesourcery arm-2009q3 toolchain warns at that the ABI
# has changed whenever it encounters a varargs function. This
# silences those warnings, as they are not helpful and
# clutter legitimate warnings.
'-Wno-abi',
],
'conditions': [
['arm_thumb == 1', {
'cflags': [
'-mthumb',
# TODO(piman): -Wa,-mimplicit-it=thumb is needed for
# inline assembly that uses condition codes but it's
# suboptimal. Better would be to #ifdef __thumb__ at the
# right place and have a separate thumb path.
'-Wa,-mimplicit-it=thumb',
]
}],
['arm_version==7', {
'cflags': [
'-march=armv7-a',
'-mtune=cortex-a8',
'-mfloat-abi=softfp',
],
'conditions': [
['arm_neon==1', {
'cflags': [ '-mfpu=neon', ],
}, {
'cflags': [ '-mfpu=<(arm_fpu)', ],
}]
],
}],
],
}],
],
}],
['linux_fpic==1', {
'cflags': [
'-fPIC',
],
}],
['sysroot!=""', {
'target_conditions': [
['_toolset=="target"', {
'cflags': [
'--sysroot=<(sysroot)',
],
'ldflags': [
'--sysroot=<(sysroot)',
],
}]]
}],
['no_strict_aliasing==1', {
'cflags': [
'-fno-strict-aliasing',
],
}],
['linux_use_heapchecker==1', {
'variables': {'linux_use_tcmalloc%': 1},
}],
['linux_use_tcmalloc==0', {
'defines': ['NO_TCMALLOC'],
}],
['linux_use_heapchecker==0', {
'defines': ['NO_HEAPCHECKER'],
}],
],
},
}],
# FreeBSD-specific options; note that most FreeBSD options are set above,
# with Linux.
['OS=="freebsd"', {
'target_defaults': {
'ldflags': [
'-Wl,--no-keep-memory',
],
},
}],
['OS=="solaris"', {
'cflags!': ['-fvisibility=hidden'],
'cflags_cc!': ['-fvisibility-inlines-hidden'],
}],
['OS=="mac"', {
'target_defaults': {
'variables': {
# This should be 'mac_real_dsym%', but there seems to be a bug
# with % in variables that are intended to be set to different
# values in different targets, like this one.
'mac_real_dsym': 0, # Fake .dSYMs are fine in most cases.
},
'mac_bundle': 0,
'xcode_settings': {
'ALWAYS_SEARCH_USER_PATHS': 'NO',
'GCC_C_LANGUAGE_STANDARD': 'c99', # -std=c99
'GCC_CW_ASM_SYNTAX': 'NO', # No -fasm-blocks
'GCC_DYNAMIC_NO_PIC': 'NO', # No -mdynamic-no-pic
# (Equivalent to -fPIC)
'GCC_ENABLE_CPP_EXCEPTIONS': 'NO', # -fno-exceptions
'GCC_ENABLE_CPP_RTTI': 'YES', # -frtti
'GCC_ENABLE_PASCAL_STRINGS': 'NO', # No -mpascal-strings
# GCC_INLINES_ARE_PRIVATE_EXTERN maps to -fvisibility-inlines-hidden
'GCC_INLINES_ARE_PRIVATE_EXTERN': 'YES',
'GCC_OBJC_CALL_CXX_CDTORS': 'YES', # -fobjc-call-cxx-cdtors
'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
'GCC_THREADSAFE_STATICS': 'NO', # -fno-threadsafe-statics
'GCC_TREAT_WARNINGS_AS_ERRORS': 'YES', # -Werror
'GCC_VERSION': '4.2',
'GCC_WARN_ABOUT_MISSING_NEWLINE': 'YES', # -Wnewline-eof
# MACOSX_DEPLOYMENT_TARGET maps to -mmacosx-version-min
'MACOSX_DEPLOYMENT_TARGET': '<(mac_deployment_target)',
'PREBINDING': 'NO', # No -Wl,-prebind
'USE_HEADERMAP': 'NO',
'WARNING_CFLAGS': ['-Wall', '-Wendif-labels'],
'conditions': [
['chromium_mac_pch', {'GCC_PRECOMPILE_PREFIX_HEADER': 'YES'},
{'GCC_PRECOMPILE_PREFIX_HEADER': 'NO'}
],
],
},
'target_conditions': [
['_type!="static_library"', {
'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-search_paths_first']},
}],
['_mac_bundle', {
'xcode_settings': {'OTHER_LDFLAGS': ['-Wl,-ObjC']},
}],
], # target_conditions
}, # target_defaults
}], # OS=="mac"
['OS=="win"', {
'target_defaults': {
'defines': [
'_WIN32_WINNT=0x0600',
'WINVER=0x0600',
'WIN32',
'_WINDOWS',
'_HAS_EXCEPTIONS=0',
'NOMINMAX',
'_CRT_RAND_S',
'CERT_CHAIN_PARA_HAS_EXTRA_FIELDS',
'WIN32_LEAN_AND_MEAN',
'_SECURE_ATL',
'_HAS_TR1=0',
],
'msvs_system_include_dirs': [
'<(DEPTH)/third_party/platformsdk_win7/files/Include',
'$(VSInstallDir)/VC/atlmfc/include',
],
'msvs_cygwin_dirs': ['<(DEPTH)/third_party/cygwin'],
'msvs_disabled_warnings': [
4091, 4100, 4127, 4366, 4396, 4503, 4512, 4819, 4995, 4702
],
'msvs_settings': {
'VCCLCompilerTool': {
'MinimalRebuild': 'false',
'ExceptionHandling': '0',
'BufferSecurityCheck': 'true',
'EnableFunctionLevelLinking': 'true',
'RuntimeTypeInfo': 'false',
'WarningLevel': '4',
'WarnAsError': 'true',
'DebugInformationFormat': '3',
'conditions': [
[ 'msvs_multi_core_compile', {
'AdditionalOptions': ['/MP'],
}],
],
},
'VCLibrarianTool': {
'AdditionalOptions': ['/ignore:4221'],
'AdditionalLibraryDirectories':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
},
'VCLinkerTool': {
'AdditionalDependencies': [
'wininet.lib',
'version.lib',
'msimg32.lib',
'ws2_32.lib',
'usp10.lib',
'psapi.lib',
'dbghelp.lib',
],
'AdditionalLibraryDirectories':
['<(DEPTH)/third_party/platformsdk_win7/files/Lib'],
'GenerateDebugInformation': 'true',
'MapFileName': '$(OutDir)\\$(TargetName).map',
'ImportLibrary': '$(OutDir)\\lib\\$(TargetName).lib',
'FixedBaseAddress': '1',
# SubSystem values:
# 0 == not set
# 1 == /SUBSYSTEM:CONSOLE
# 2 == /SUBSYSTEM:WINDOWS
# Most of the executables we'll ever create are tests
# and utilities with console output.
'SubSystem': '1',
},
'VCMIDLTool': {
'GenerateStublessProxies': 'true',
'TypeLibraryName': '$(InputName).tlb',
'OutputDirectory': '$(IntDir)',
'HeaderFileName': '$(InputName).h',
'DLLDataFileName': 'dlldata.c',
'InterfaceIdentifierFileName': '$(InputName)_i.c',
'ProxyFileName': '$(InputName)_p.c',
},
'VCResourceCompilerTool': {
'Culture' : '1033',
'AdditionalIncludeDirectories': ['<(DEPTH)'],
},
},
},
}],
['disable_nacl==1 or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
'target_defaults': {
'defines': [
'DISABLE_NACL',
],
},
}],
['OS=="win" and msvs_use_common_linker_extras', {
'target_defaults': {
'msvs_settings': {
'VCLinkerTool': {
'DelayLoadDLLs': [
'dbghelp.dll',
'dwmapi.dll',
'uxtheme.dll',
],
},
},
'configurations': {
'x86_Base': {
'msvs_settings': {
'VCLinkerTool': {
'AdditionalOptions': [
'/safeseh',
'/dynamicbase',
'/ignore:4199',
'/ignore:4221',
'/nxcompat',
],
},
},
},
'x64_Base': {
'msvs_settings': {
'VCLinkerTool': {
'AdditionalOptions': [
# safeseh is not compatible with x64
'/dynamicbase',
'/ignore:4199',
'/ignore:4221',
'/nxcompat',
],
},
},
},
},
},
}],
['enable_new_npdevice_api==1', {
'target_defaults': {
'defines': [
'ENABLE_NEW_NPDEVICE_API',
],
},
}],
],
'scons_settings': {
'sconsbuild_dir': '<(DEPTH)/sconsbuild',
'tools': ['ar', 'as', 'gcc', 'g++', 'gnulink', 'chromium_builders'],
},
'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.
# In an Xcode Project Info window, the "Base SDK for All Configurations"
# setting sets the SDK on a project-wide basis. In order to get the
# configured SDK to show properly in the Xcode UI, SDKROOT must be set
# here at the project level.
'SDKROOT': 'macosx<(mac_sdk)', # -isysroot
# 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',
},
}