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	{
	'variables': {
	'configuring_node%': 0,
	'asan%': 0,
	'werror': '', # Turn off -Werror in V8 build.
	'visibility%': 'hidden', # V8's visibility setting
	'target_arch%': 'ia32', # set v8's target architecture
	'host_arch%': 'ia32', # set v8's host architecture
	'want_separate_host_toolset%': 0, # V8 should not build target and host
	'library%': 'static_library', # allow override to 'shared_library' for DLL/.so builds
	'component%': 'static_library', # NB. these names match with what V8 expects
	'msvs_multi_core_compile': '0', # we do enable multicore compiles, but not using the V8 way
	'enable_pgo_generate%': '0',
	'enable_pgo_use%': '0',
	'python%': 'python',

	'node_shared%': 'false',
	'force_dynamic_crt%': 0,
	'node_use_v8_platform%': 'true',
	'node_use_bundled_v8%': 'true',
	'node_module_version%': '',
	'node_with_ltcg%': '',
	'node_shared_openssl%': 'false',

	'node_tag%': '',
	'uv_library%': 'static_library',

	'clang%': 0,
	'error_on_warn%': 'false',

	'openssl_fips%': '',
	'openssl_no_asm%': 0,

	# Don't use ICU data file (icudtl.dat) from V8, we use our own.
	'icu_use_data_file_flag%': 0,

	# Reset this number to 0 on major V8 upgrades.
	# Increment by one for each non-official patch applied to deps/v8.
	'v8_embedder_string': '-node.16',

	##### V8 defaults for Node.js #####

	# Turn on SipHash for hash seed generation, addresses HashWick
	'v8_use_siphash': 'true',

	# These are more relevant for V8 internal development.
	# Refs: https://github.com/nodejs/node/issues/23122
	# Refs: https://github.com/nodejs/node/issues/23167
	# Enable compiler warnings when using V8_DEPRECATED apis from V8 code.
	'v8_deprecation_warnings': 0,
	# Enable compiler warnings when using V8_DEPRECATE_SOON apis from V8 code.
	'v8_imminent_deprecation_warnings': 0,

	# Enable disassembler for `--print-code` v8 options
	'v8_enable_disassembler': 1,

	# Sets -dOBJECT_PRINT.
	'v8_enable_object_print%': 1,

	# https://github.com/nodejs/node/pull/22920/files#r222779926
	'v8_enable_handle_zapping': 0,

	# Disable pointer compression. Can be enabled at build time via configure
	# options but default values are required here as this file is also used by
	# node-gyp to build addons.
	'v8_enable_pointer_compression%': 0,
	'v8_enable_31bit_smis_on_64bit_arch%': 0,

	# Disable V8 untrusted code mitigations.
	# See https://github.com/v8/v8/wiki/Untrusted-code-mitigations
	'v8_untrusted_code_mitigations': 0,

	# This is more of a V8 dev setting
	# https://github.com/nodejs/node/pull/22920/files#r222779926
	'v8_enable_fast_mksnapshot': 0,

	'v8_win64_unwinding_info': 1,

	# TODO(refack): make v8-perfetto happen
	'v8_use_perfetto': 0,

	##### end V8 defaults #####

	'conditions': [
	['OS == "win"', {
	'os_posix': 0,
	'v8_postmortem_support%': 0,
	'obj_dir': '<(PRODUCT_DIR)/obj',
	'v8_base': '<(PRODUCT_DIR)/lib/libv8_snapshot.a',
	}, {
	'os_posix': 1,
	'v8_postmortem_support%': 1,
	}],
	['GENERATOR == "ninja"', {
	'obj_dir': '<(PRODUCT_DIR)/obj',
	'v8_base': '<(PRODUCT_DIR)/obj/tools/v8_gypfiles/libv8_snapshot.a',
	}, {
	'obj_dir%': '<(PRODUCT_DIR)/obj.target',
	'v8_base': '<(PRODUCT_DIR)/obj.target/tools/v8_gypfiles/libv8_snapshot.a',
	}],
	['openssl_fips != ""', {
	'openssl_product': '<(STATIC_LIB_PREFIX)crypto<(STATIC_LIB_SUFFIX)',
	}, {
	'openssl_product': '<(STATIC_LIB_PREFIX)openssl<(STATIC_LIB_SUFFIX)',
	}],
	['OS=="mac"', {
	'clang%': 1,
	'obj_dir%': '<(PRODUCT_DIR)/obj.target',
	'v8_base': '<(PRODUCT_DIR)/libv8_snapshot.a',
	}],
	['target_arch in "ppc64 s390x"', {
	'v8_enable_backtrace': 1,
	}],
	['OS=="linux"', {
	'node_section_ordering_info%': ''
	}]
	],
	},

	'target_defaults': {
	'default_configuration': 'Release',
	'configurations': {
	'Debug': {
	'variables': {
	'v8_enable_handle_zapping': 1,
	'conditions': [
	['node_shared != "true"', {
	'MSVC_runtimeType': 1, # MultiThreadedDebug (/MTd)
	}, {
	'MSVC_runtimeType': 3, # MultiThreadedDebugDLL (/MDd)
	}],
	],
	},
	'defines': [ 'DEBUG', '_DEBUG', 'V8_ENABLE_CHECKS' ],
	'cflags': [ '-g', '-O0' ],
	'conditions': [
	['OS=="aix"', {
	'cflags': [ '-gxcoff' ],
	'ldflags': [ '-Wl,-bbigtoc' ],
	}],
	['OS == "android"', {
	'cflags': [ '-fPIC' ],
	'ldflags': [ '-fPIC' ]
	}],
	],
	'msvs_settings': {
	'VCCLCompilerTool': {
	'BasicRuntimeChecks': 3, # /RTC1
	'MinimalRebuild': 'false',
	'OmitFramePointers': 'false',
	'Optimization': 0, # /Od, no optimization
	'RuntimeLibrary': '<(MSVC_runtimeType)',
	},
	'VCLinkerTool': {
	'LinkIncremental': 2, # enable incremental linking
	},
	},
	'xcode_settings': {
	'GCC_OPTIMIZATION_LEVEL': '0', # stop gyp from defaulting to -Os
	},
	},
	'Release': {
	'variables': {
	'v8_enable_handle_zapping': 0,
	'pgo_generate': ' -fprofile-generate ',
	'pgo_use': ' -fprofile-use -fprofile-correction ',
	'lto': ' -flto=4 -fuse-linker-plugin -ffat-lto-objects ',
	'conditions': [
	['node_shared != "true"', {
	'MSVC_runtimeType': 0 # MultiThreaded (/MT)
	}, {
	'MSVC_runtimeType': 2 # MultiThreadedDLL (/MD)
	}],
	],
	},
	'cflags': [ '-O3' ],
	'conditions': [
	['OS=="linux"', {
	'conditions': [
	['node_section_ordering_info!=""', {
	'cflags': [
	'-fuse-ld=gold',
	'-ffunction-sections',
	],
	'ldflags': [
	'-fuse-ld=gold',
	'-Wl,--section-ordering-file=<(node_section_ordering_info)',
	],
	}],
	],
	}],
	['OS=="solaris"', {
	# pull in V8's postmortem metadata
	'ldflags': [ '-Wl,-z,allextract' ]
	}],
	['OS!="mac" and OS!="win"', {
	'cflags': [ '-fno-omit-frame-pointer' ],
	}],
	['OS=="linux"', {
	'conditions': [
	['enable_pgo_generate=="true"', {
	'cflags': ['<(pgo_generate)'],
	'ldflags': ['<(pgo_generate)'],
	},],
	['enable_pgo_use=="true"', {
	'cflags': ['<(pgo_use)'],
	'ldflags': ['<(pgo_use)'],
	},],
	['enable_lto=="true"', {
	'cflags': ['<(lto)'],
	'ldflags': ['<(lto)'],
	},],
	],
	},],
	['OS == "android"', {
	'cflags': [ '-fPIC' ],
	'ldflags': [ '-fPIC' ]
	}],
	],
	'msvs_settings': {
	'VCCLCompilerTool': {
	'conditions': [
	['target_arch=="arm64"', {
	'FloatingPointModel': 1 # /fp:strict
	}]
	],
	'EnableFunctionLevelLinking': 'true',
	'EnableIntrinsicFunctions': 'true',
	'FavorSizeOrSpeed': 1, # /Ot, favor speed over size
	'InlineFunctionExpansion': 2, # /Ob2, inline anything eligible
	'OmitFramePointers': 'true',
	'Optimization': 3, # /Ox, full optimization
	'RuntimeLibrary': '<(MSVC_runtimeType)',
	'RuntimeTypeInfo': 'false',
	}
	},
	'xcode_settings': {
	'GCC_OPTIMIZATION_LEVEL': '3', # stop gyp from defaulting to -Os
	},
	}
	},

	# Defines these mostly for node-gyp to pickup, and warn addon authors of
	# imminent V8 deprecations, also to sync how dependencies are configured.
	'defines': [
	'V8_DEPRECATION_WARNINGS',
	'V8_IMMINENT_DEPRECATION_WARNINGS',
	],

	# Forcibly disable -Werror. We support a wide range of compilers, it's
	# simply not feasible to squelch all warnings, never mind that the
	# libraries in deps/ are not under our control.
	'conditions': [
	[ 'error_on_warn=="false"', {
	'cflags!': ['-Werror'],
	}, '(_target_name!="<(node_lib_target_name)" or '
	'_target_name!="<(node_core_target_name)")', {
	'cflags!': ['-Werror'],
	}],
	],
	'msvs_settings': {
	'VCCLCompilerTool': {
	'BufferSecurityCheck': 'true',
	'DebugInformationFormat': 1, # /Z7 embed info in .obj files
	'ExceptionHandling': 0, # /EHsc
	'MultiProcessorCompilation': 'true',
	'StringPooling': 'true', # pool string literals
	'SuppressStartupBanner': 'true',
	'WarnAsError': 'false',
	'WarningLevel': 3, # /W3
	},
	'VCLinkerTool': {
	'target_conditions': [
	['_type=="executable"', {
	'SubSystem': 1, # /SUBSYSTEM:CONSOLE
	}],
	],
	'conditions': [
	['target_arch=="ia32"', {
	'TargetMachine' : 1, # /MACHINE:X86
	}],
	['target_arch=="x64"', {
	'TargetMachine' : 17, # /MACHINE:X64
	}],
	['target_arch=="arm64"', {
	'TargetMachine' : 0, # NotSet. MACHINE:ARM64 is inferred from the input files.
	}],
	],
	'GenerateDebugInformation': 'true',
	'SuppressStartupBanner': 'true',
	},
	},
	# Disable warnings:
	# - "C4251: class needs to have dll-interface"
	# - "C4275: non-DLL-interface used as base for DLL-interface"
	# Over 10k of these warnings are generated when compiling node,
	# originating from v8.h. Most of them are false positives.
	# See also: https://github.com/nodejs/node/pull/15570
	# TODO: re-enable when Visual Studio fixes these upstream.
	#
	# - "C4267: conversion from 'size_t' to 'int'"
	# Many any originate from our dependencies, and their sheer number
	# drowns out other, more legitimate warnings.
	# - "C4244: conversion from 'type1' to 'type2', possible loss of data"
	# Ususaly safe. Disable for `dep`, enable for `src`
	'msvs_disabled_warnings': [4351, 4355, 4800, 4251, 4275, 4244, 4267],
	'msvs_cygwin_shell': 0, # prevent actions from trying to use cygwin

	'conditions': [
	[ 'configuring_node', {
	'msvs_configuration_attributes': {
	'OutputDirectory': '<(DEPTH)/out/$(Configuration)/',
	'IntermediateDirectory': '$(OutDir)obj/$(ProjectName)/'
	},
	}],
	[ 'target_arch=="x64"', {
	'msvs_configuration_platform': 'x64',
	}],
	[ 'target_arch=="arm64"', {
	'msvs_configuration_platform': 'arm64',
	}],
	['asan == 1 and OS != "mac"', {
	'cflags+': [
	'-fno-omit-frame-pointer',
	'-fsanitize=address',
	'-fsanitize-address-use-after-scope',
	],
	'defines': [ 'LEAK_SANITIZER', 'V8_USE_ADDRESS_SANITIZER' ],
	'cflags!': [ '-fomit-frame-pointer' ],
	'ldflags': [ '-fsanitize=address' ],
	}],
	['asan == 1 and OS == "mac"', {
	'xcode_settings': {
	'OTHER_CFLAGS+': [
	'-fno-omit-frame-pointer',
	'-gline-tables-only',
	'-fsanitize=address',
	'-DLEAK_SANITIZER'
	],
	'OTHER_CFLAGS!': [
	'-fomit-frame-pointer',
	],
	},
	'target_conditions': [
	['_type!="static_library"', {
	'xcode_settings': {'OTHER_LDFLAGS': ['-fsanitize=address']},
	}],
	],
	}],
	['v8_enable_pointer_compression == 1', {
	'defines': ['V8_COMPRESS_POINTERS'],
	}],
	['v8_enable_pointer_compression == 1 or v8_enable_31bit_smis_on_64bit_arch == 1', {
	'defines': ['V8_31BIT_SMIS_ON_64BIT_ARCH'],
	}],
	['OS == "win"', {
	'defines': [
	'WIN32',
	# we don't really want VC++ warning us about
	# how dangerous C functions are...
	'_CRT_SECURE_NO_DEPRECATE',
	# ... or that C implementations shouldn't use
	# POSIX names
	'_CRT_NONSTDC_NO_DEPRECATE',
	# Make sure the STL doesn't try to use exceptions
	'_HAS_EXCEPTIONS=0',
	'BUILDING_V8_SHARED=1',
	'BUILDING_UV_SHARED=1',
	],
	}],
	[ 'OS in "linux freebsd openbsd solaris aix"', {
	'cflags': [ '-pthread' ],
	'ldflags': [ '-pthread' ],
	}],
	[ 'OS in "linux freebsd openbsd solaris android aix cloudabi"', {
	'cflags': [ '-Wall', '-Wextra', '-Wno-unused-parameter', ],
	'cflags_cc': [ '-fno-rtti', '-fno-exceptions', '-std=gnu++1y' ],
	'defines': [ '__STDC_FORMAT_MACROS' ],
	'ldflags': [ '-rdynamic' ],
	'target_conditions': [
	# The 1990s toolchain on SmartOS can't handle thin archives.
	['_type=="static_library" and OS=="solaris"', {
	'standalone_static_library': 1,
	}],
	['OS=="openbsd"', {
	'cflags': [ '-I/usr/local/include' ],
	'ldflags': [ '-Wl,-z,wxneeded' ],
	}],
	],
	'conditions': [
	[ 'target_arch=="ia32"', {
	'cflags': [ '-m32' ],
	'ldflags': [ '-m32' ],
	}],
	[ 'target_arch=="x32"', {
	'cflags': [ '-mx32' ],
	'ldflags': [ '-mx32' ],
	}],
	[ 'target_arch=="x64"', {
	'cflags': [ '-m64' ],
	'ldflags': [ '-m64' ],
	}],
	[ 'target_arch=="ppc" and OS!="aix"', {
	'cflags': [ '-m32' ],
	'ldflags': [ '-m32' ],
	}],
	[ 'target_arch=="ppc64" and OS!="aix"', {
	'cflags': [ '-m64', '-mminimal-toc' ],
	'ldflags': [ '-m64' ],
	}],
	[ 'target_arch=="s390x"', {
	'cflags': [ '-m64', '-march=z196' ],
	'ldflags': [ '-m64', '-march=z196' ],
	}],
	[ 'OS=="solaris"', {
	'cflags': [ '-pthreads' ],
	'ldflags': [ '-pthreads' ],
	'cflags!': [ '-pthread' ],
	'ldflags!': [ '-pthread' ],
	}],
	[ 'node_shared=="true"', {
	'cflags': [ '-fPIC' ],
	}],
	],
	}],
	[ 'OS=="aix"', {
	'variables': {
	# Used to differentiate `AIX` and `OS400`(IBM i).
	'aix_variant_name': '<!(uname -s)',
	},
	'cflags': [ '-maix64', ],
	'ldflags!': [ '-rdynamic', ],
	'ldflags': [
	'-Wl,-bbigtoc',
	'-maix64',
	],
	'conditions': [
	[ '"<(aix_variant_name)"=="OS400"', { # a.k.a. `IBM i`
	'ldflags': [
	'-Wl,-blibpath:/QOpenSys/pkgs/lib:/QOpenSys/usr/lib',
	'-Wl,-brtl',
	],
	}, { # else it's `AIX`
	# Disable the following compiler warning:
	#
	# warning: visibility attribute not supported in this
	# configuration; ignored [-Wattributes]
	#
	# This is gcc complaining about __attribute((visibility("default"))
	# in static library builds. Legitimate but harmless and it drowns
	# out more relevant warnings.
	'cflags': [ '-Wno-attributes' ],
	'ldflags': [
	'-Wl,-blibpath:/usr/lib:/lib:/opt/freeware/lib/pthread/ppc64',
	],
	}],
	],
	}],
	['OS=="android"', {
	'target_conditions': [
	['_toolset=="target"', {
	'defines': [ '_GLIBCXX_USE_C99_MATH' ],
	'libraries': [ '-llog' ],
	}],
	['_toolset=="host"', {
	'cflags': [ '-pthread' ],
	'ldflags': [ '-pthread' ],
	}],
	],
	}],
	['OS=="mac"', {
	'defines': ['_DARWIN_USE_64_BIT_INODE=1'],
	'xcode_settings': {
	'ALWAYS_SEARCH_USER_PATHS': 'NO',
	'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': 'NO', # -fno-rtti
	'GCC_ENABLE_PASCAL_STRINGS': 'NO', # No -mpascal-strings
	'PREBINDING': 'NO', # No -Wl,-prebind
	'MACOSX_DEPLOYMENT_TARGET': '10.13', # -mmacosx-version-min=10.13
	'USE_HEADERMAP': 'NO',
	'OTHER_CFLAGS': [
	'-fno-strict-aliasing',
	],
	'WARNING_CFLAGS': [
	'-Wall',
	'-Wendif-labels',
	'-W',
	'-Wno-unused-parameter',
	],
	},
	'target_conditions': [
	['_type!="static_library"', {
	'xcode_settings': {
	'OTHER_LDFLAGS': [
	'-Wl,-no_pie',
	'-Wl,-search_paths_first',
	],
	},
	}],
	],
	'conditions': [
	['target_arch=="ia32"', {
	'xcode_settings': {'ARCHS': ['i386']},
	}],
	['target_arch=="x64"', {
	'xcode_settings': {'ARCHS': ['x86_64']},
	}],
	['target_arch=="arm64"', {
	'xcode_settings': {
	'ARCHS': ['arm64'],
	'OTHER_LDFLAGS!': [
	'-Wl,-no_pie',
	],
	},
	}],
	['clang==1', {
	'xcode_settings': {
	'GCC_VERSION': 'com.apple.compilers.llvm.clang.1_0',
	'CLANG_CXX_LANGUAGE_STANDARD': 'gnu++1y', # -std=gnu++1y
	'CLANG_CXX_LIBRARY': 'libc++',
	},
	}],
	],
	}],
	['OS=="freebsd" and node_use_dtrace=="true"', {
	'libraries': [ '-lelf' ],
	}],
	['OS=="freebsd"', {
	'ldflags': [
	'-Wl,--export-dynamic',
	],
	}],
	# if node is built as an executable,
	# the openssl mechanism for keeping itself "dload"-ed to ensure proper
	# atexit cleanup does not apply
	['node_shared_openssl!="true" and node_shared!="true"', {
	'defines': [
	# `OPENSSL_NO_PINSHARED` prevents openssl from dload
	# current node executable,
	# see https://github.com/nodejs/node/pull/21848
	# or https://github.com/nodejs/node/issues/27925
	'OPENSSL_NO_PINSHARED'
	],
	}],
	['node_shared_openssl!="true"', {
	# `OPENSSL_THREADS` is defined via GYP for openSSL for all architectures.
	'defines': [
	'OPENSSL_THREADS',
	],
	}],
	['node_shared_openssl!="true" and openssl_no_asm==1', {
	'defines': [
	'OPENSSL_NO_ASM',
	],
	}],
	],
	}
	}

Sep	OCT	Nov
	23
2019	2020	2021

nodejs / node

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