1347 строки
43 KiB
Plaintext
1347 строки
43 KiB
Plaintext
# Copyright (c) 2013 The Chromium Authors. All rights reserved.
|
|
# Use of this source code is governed by a BSD-style license that can be
|
|
# found in the LICENSE file.
|
|
|
|
import("//build/config/android/config.gni")
|
|
import("//build/config/chrome_build.gni")
|
|
if (current_cpu == "arm") {
|
|
import("//build/config/arm.gni")
|
|
}
|
|
if (current_cpu == "mipsel" || current_cpu == "mips64el") {
|
|
import("//build/config/mips.gni")
|
|
}
|
|
if (is_posix) {
|
|
import("//build/config/gcc/gcc_version.gni")
|
|
}
|
|
if (is_win) {
|
|
import("//build/config/win/visual_studio_version.gni")
|
|
}
|
|
|
|
import("//build/toolchain/ccache.gni")
|
|
import("//build/config/sanitizers/sanitizers.gni")
|
|
|
|
declare_args() {
|
|
# Normally, Android builds are lightly optimized, even for debug builds, to
|
|
# keep binary size down. Setting this flag to true disables such optimization
|
|
android_full_debug = false
|
|
|
|
# Whether to use the binary binutils checked into third_party/binutils.
|
|
# These are not multi-arch so cannot be used except on x86 and x86-64 (the
|
|
# only two architectures that are currently checked in). Turn this off when
|
|
# you are using a custom toolchain and need to control -B in cflags.
|
|
linux_use_bundled_binutils = is_linux && current_cpu == "x64"
|
|
binutils_path = rebase_path("//third_party/binutils/Linux_x64/Release/bin",
|
|
root_build_dir)
|
|
|
|
# Compile in such a way as to enable profiling of the generated code. For
|
|
# example, don't omit the frame pointer and leave in symbols.
|
|
enable_profiling = false
|
|
|
|
# Compile in such a way as to make it possible for the profiler to unwind full
|
|
# stack frames. Setting this flag has a large effect on the performance of the
|
|
# generated code than just setting profiling, but gives the profiler more
|
|
# information to analyze.
|
|
# Requires profiling to be set to true.
|
|
enable_full_stack_frames_for_profiling = false
|
|
|
|
# Use gold for linking on 64-bit Linux only (on 32-bit it runs out of
|
|
# address space, and it doesn't support cross-compiling).
|
|
use_gold = is_linux && current_cpu == "x64"
|
|
|
|
# When we are going to use gold we need to find it.
|
|
if (use_gold) {
|
|
gold_path = rebase_path("//third_party/binutils/Linux_x64/Release/bin",
|
|
root_build_dir)
|
|
} else {
|
|
gold_path = ""
|
|
}
|
|
|
|
# use_debug_fission: whether to use split DWARF debug info
|
|
# files. This can reduce link time significantly, but is incompatible
|
|
# with some utilities such as icecc and ccache. Requires gold and
|
|
# gcc >= 4.8 or clang.
|
|
# http://gcc.gnu.org/wiki/DebugFission
|
|
use_debug_fission = is_debug && !is_win && use_gold &&
|
|
linux_use_bundled_binutils && !use_ccache
|
|
|
|
if (is_win) {
|
|
# Whether the VS xtree header has been patched to disable warning 4702. If
|
|
# it has, then we don't need to disable 4702 (unreachable code warning).
|
|
# The patch is preapplied to the internal toolchain and hence all bots.
|
|
msvs_xtree_patched = false
|
|
}
|
|
}
|
|
|
|
# default_include_dirs ---------------------------------------------------------
|
|
#
|
|
# This is a separate config so that third_party code (which would not use the
|
|
# source root and might have conflicting versions of some headers) can remove
|
|
# this and specify their own include paths.
|
|
config("default_include_dirs") {
|
|
include_dirs = [
|
|
"//",
|
|
root_gen_dir,
|
|
]
|
|
}
|
|
|
|
# TODO(GYP): is_ubsan, is_ubsan_vptr
|
|
if (!is_win) {
|
|
using_sanitizer = is_asan || is_lsan || is_tsan || is_msan
|
|
}
|
|
|
|
# compiler ---------------------------------------------------------------------
|
|
#
|
|
# Base compiler configuration.
|
|
#
|
|
# See also "runtime_library" below for related stuff and a discussion about
|
|
# where stuff should go. Put warning related stuff in the "warnings" config.
|
|
|
|
config("compiler") {
|
|
cflags = []
|
|
cflags_c = []
|
|
cflags_cc = []
|
|
cflags_objc = []
|
|
cflags_objcc = []
|
|
ldflags = []
|
|
defines = []
|
|
|
|
# In general, Windows is totally different, but all the other builds share
|
|
# some common GCC configuration. This section sets up Windows and the common
|
|
# GCC flags, and then we handle the other non-Windows platforms specifically
|
|
# below.
|
|
if (is_win) {
|
|
# Windows compiler flags setup.
|
|
# -----------------------------
|
|
cflags += [
|
|
"/Gy", # Enable function-level linking.
|
|
"/GS", # Enable buffer security checking.
|
|
"/FS", # Preserve previous PDB behavior.
|
|
"/bigobj", # Some of our files are bigger than the regular limits.
|
|
]
|
|
|
|
# Force C/C++ mode for the given GN detected file type. This is necessary
|
|
# for precompiled headers where the same source file is compiled in both
|
|
# modes.
|
|
cflags_c += [ "/TC" ]
|
|
cflags_cc += [ "/TP" ]
|
|
|
|
# Building with Clang on Windows is a work in progress and very
|
|
# experimental. See crbug.com/82385.
|
|
# Keep this in sync with the similar block in build/common.gypi
|
|
if (is_clang) {
|
|
cflags += [
|
|
# Many files use intrinsics without including this header.
|
|
# TODO(hans): Fix those files, or move this to sub-GYPs.
|
|
"/FIIntrin.h",
|
|
]
|
|
|
|
if (visual_studio_version == "2013") {
|
|
cflags += [ "-fmsc-version=1800" ]
|
|
} else if (visual_studio_version == "2015") {
|
|
cflags += [ "-fmsc-version=1900" ]
|
|
}
|
|
|
|
if (current_cpu == "x86") {
|
|
cflags += [ "-m32" ]
|
|
} else {
|
|
cflags += [ "-m64" ]
|
|
}
|
|
|
|
if (exec_script("//build/win/use_ansi_codes.py", [], "trim string") ==
|
|
"True") {
|
|
cflags += [
|
|
# cmd.exe doesn't understand ANSI escape codes by default,
|
|
# so only enable them if something emulating them is around.
|
|
"-fansi-escape-codes",
|
|
]
|
|
}
|
|
}
|
|
|
|
if (is_syzyasan) {
|
|
# SyzyAsan needs /PROFILE turned on to produce appropriate pdbs.
|
|
assert(!is_win_fastlink, "/PROFILE and /DEBUG:FASTLINK are incompatible")
|
|
ldflags += [ "/PROFILE" ]
|
|
}
|
|
} else {
|
|
# Common GCC compiler flags setup.
|
|
# --------------------------------
|
|
cflags += [ "-fno-strict-aliasing" ] # See http://crbug.com/32204
|
|
cflags_cc += [
|
|
"-fno-threadsafe-statics",
|
|
|
|
# Not exporting C++ inline functions can generally be applied anywhere
|
|
# so we do so here. Normal function visibility is controlled by
|
|
# //build/config/gcc:symbol_visibility_hidden.
|
|
"-fvisibility-inlines-hidden",
|
|
]
|
|
|
|
# Stack protection.
|
|
if (is_mac) {
|
|
cflags += [ "-fstack-protector-all" ]
|
|
} else if (is_posix && !is_chromeos && !is_nacl) {
|
|
# TODO(phajdan.jr): Use -fstack-protector-strong when our gcc supports it.
|
|
cflags += [ "--param=ssp-buffer-size=4" ]
|
|
if (is_android && (current_cpu == "arm64" || current_cpu == "x86")) {
|
|
cflags += [ "-fno-stack-protector" ]
|
|
} else {
|
|
cflags += [ "-fstack-protector" ]
|
|
}
|
|
}
|
|
|
|
# Linker warnings.
|
|
if (!(is_chromeos && current_cpu == "arm") && !is_mac && !is_ios) {
|
|
# TODO(jochen): Enable this on chromeos on arm. http://crbug.com/356580
|
|
ldflags += [ "-Wl,--fatal-warnings" ]
|
|
}
|
|
|
|
# Common options for AddressSanitizer, LeakSanitizer, ThreadSanitizer and
|
|
# MemorySanitizer
|
|
if (using_sanitizer) {
|
|
cflags += [
|
|
"-fno-omit-frame-pointer",
|
|
"-gline-tables-only",
|
|
]
|
|
}
|
|
if (is_asan) {
|
|
asan_blacklist_path =
|
|
rebase_path("//tools/memory/asan/blacklist.txt", root_build_dir)
|
|
cflags += [
|
|
"-fsanitize=address",
|
|
"-fsanitize-blacklist=$asan_blacklist_path",
|
|
]
|
|
if (is_mac) {
|
|
cflags += [ "-mllvm -asan-globals=0" ] # http://crbug.com/352073
|
|
# TODO(GYP): deal with mac_bundles.
|
|
}
|
|
}
|
|
if (is_lsan) {
|
|
cflags += [ "-fsanitize=leak" ]
|
|
}
|
|
if (is_tsan) {
|
|
tsan_blacklist_path =
|
|
rebase_path("//tools/memory/tsan_v2/ignores.txt", root_build_dir)
|
|
cflags += [
|
|
"-fsanitize=thread",
|
|
"-fsanitize-blacklist=$tsan_blacklist_path",
|
|
]
|
|
}
|
|
if (is_msan) {
|
|
msan_blacklist_path =
|
|
rebase_path("//tools/msan/blacklist.txt", root_build_dir)
|
|
cflags += [
|
|
"-fsanitize=memory",
|
|
"-fsanitize-memory-track-origins=$msan_track_origins",
|
|
"-fsanitize-blacklist=$msan_blacklist_path",
|
|
]
|
|
}
|
|
|
|
if (use_custom_libcxx) {
|
|
cflags_cc += [ "-nostdinc++" ]
|
|
include_dirs = [
|
|
"//buildtools/third_party/libc++/trunk/include",
|
|
"//buildtools/third_party/libc++abi/trunk/include",
|
|
]
|
|
}
|
|
}
|
|
|
|
if (is_clang && is_debug) {
|
|
# Allow comparing the address of references and 'this' against 0
|
|
# in debug builds. Technically, these can never be null in
|
|
# well-defined C/C++ and Clang can optimize such checks away in
|
|
# release builds, but they may be used in asserts in debug builds.
|
|
cflags_cc += [
|
|
"-Wno-undefined-bool-conversion",
|
|
"-Wno-tautological-undefined-compare",
|
|
]
|
|
}
|
|
|
|
if (is_clang && !is_nacl) {
|
|
# This is here so that all files get recompiled after a clang roll and
|
|
# when turning clang on or off. (defines are passed via the command line,
|
|
# and build system rebuild things when their commandline changes). Nothing
|
|
# should ever read this define.
|
|
defines +=
|
|
[ "CR_CLANG_REVISION=" + exec_script("//tools/clang/scripts/update.py",
|
|
[ "--print-revision" ],
|
|
"trim string") ]
|
|
}
|
|
|
|
# Mac-specific compiler flags setup.
|
|
# ----------------------------------
|
|
if (is_mac || is_ios) {
|
|
# These flags are shared between the C compiler and linker.
|
|
common_mac_flags = []
|
|
|
|
# CPU architecture.
|
|
if (current_cpu == "x64") {
|
|
common_mac_flags += [
|
|
"-arch",
|
|
"x86_64",
|
|
]
|
|
} else if (current_cpu == "x86") {
|
|
common_mac_flags += [
|
|
"-arch",
|
|
"i386",
|
|
]
|
|
} else if (current_cpu == "arm") {
|
|
# TODO(GYP): we may need to distinguish between "arm64", "armv7",
|
|
# and "armv7s" for iOS, and hence need multiple current_cpu values
|
|
# rather than just "arm".
|
|
common_mac_flags += [
|
|
"-arch",
|
|
"arm64",
|
|
]
|
|
}
|
|
|
|
cflags += common_mac_flags
|
|
|
|
# Without this, the constructors and destructors of a C++ object inside
|
|
# an Objective C struct won't be called, which is very bad.
|
|
cflags_objcc += [ "-fobjc-call-cxx-cdtors" ]
|
|
|
|
cflags_c += [ "-std=c99" ]
|
|
|
|
ldflags += common_mac_flags
|
|
} else if (is_posix) {
|
|
# Non-Mac Posix compiler flags setup.
|
|
# -----------------------------------
|
|
if (enable_profiling && !is_debug) {
|
|
# The GYP build spams this define into every compilation unit, as we do
|
|
# here, but it only appears to be used in base and a couple other places.
|
|
# TODO(abarth): Should we move this define closer to where it's used?
|
|
defines += [ "ENABLE_PROFILING" ]
|
|
|
|
cflags += [
|
|
"-fno-omit-frame-pointer",
|
|
"-g",
|
|
]
|
|
|
|
if (enable_full_stack_frames_for_profiling) {
|
|
cflags += [
|
|
"-fno-inline",
|
|
"-fno-optimize-sibling-calls",
|
|
]
|
|
}
|
|
}
|
|
|
|
# CPU architecture. We may or may not be doing a cross compile now, so for
|
|
# simplicity we always explicitly set the architecture.
|
|
if (current_cpu == "x64") {
|
|
cflags += [
|
|
"-m64",
|
|
"-march=x86-64",
|
|
]
|
|
ldflags += [ "-m64" ]
|
|
} else if (current_cpu == "x86") {
|
|
cflags += [ "-m32" ]
|
|
ldflags += [ "-m32" ]
|
|
if (is_clang) {
|
|
cflags += [
|
|
# Else building libyuv gives clang's register allocator issues,
|
|
# see llvm.org/PR15798 / crbug.com/233709
|
|
"-momit-leaf-frame-pointer",
|
|
|
|
# Align the stack on 16-byte boundaries, http://crbug.com/418554.
|
|
"-mstack-alignment=16",
|
|
"-mstackrealign",
|
|
]
|
|
}
|
|
} else if (current_cpu == "arm") {
|
|
cflags += [
|
|
"-march=$arm_arch",
|
|
"-mfloat-abi=$arm_float_abi",
|
|
]
|
|
if (arm_tune != "") {
|
|
cflags += [ "-mtune=$arm_tune" ]
|
|
}
|
|
if (arm_use_thumb) {
|
|
cflags += [ "-mthumb" ]
|
|
if (is_android && !is_clang) { # Clang doesn't support this option.
|
|
cflags += [ "-mthumb-interwork" ]
|
|
}
|
|
}
|
|
if (!is_clang) {
|
|
# Clang doesn't support these flags.
|
|
cflags += [
|
|
# The tree-sra optimization (scalar replacement for
|
|
# aggregates enabling subsequent optimizations) leads to
|
|
# invalid code generation when using the Android NDK's
|
|
# compiler (r5-r7). This can be verified using
|
|
# webkit_unit_tests' WTF.Checked_int8_t test.
|
|
"-fno-tree-sra",
|
|
|
|
# The following option is disabled to improve binary
|
|
# size and performance in gcc 4.9.
|
|
"-fno-caller-saves",
|
|
]
|
|
}
|
|
} else if (current_cpu == "mipsel") {
|
|
if (mips_arch_variant == "r6") {
|
|
cflags += [
|
|
"-mips32r6",
|
|
"-Wa,-mips32r6",
|
|
]
|
|
if (is_android) {
|
|
ldflags += [
|
|
"-mips32r6",
|
|
"-Wl,-melf32ltsmip",
|
|
]
|
|
}
|
|
} else if (mips_arch_variant == "r2") {
|
|
cflags += [
|
|
"-mips32r2",
|
|
"-Wa,-mips32r2",
|
|
]
|
|
if (mips_float_abi == "hard" && mips_fpu_mode != "") {
|
|
cflags += [ "-m$mips_fpu_mode" ]
|
|
}
|
|
} else if (mips_arch_variant == "r1") {
|
|
cflags += [
|
|
"-mips32",
|
|
"-Wa,-mips32",
|
|
]
|
|
}
|
|
|
|
if (mips_dsp_rev == 1) {
|
|
cflags += [ "-mdsp" ]
|
|
} else if (mips_dsp_rev == 2) {
|
|
cflags += [ "-mdspr2" ]
|
|
}
|
|
|
|
cflags += [ "-m${mips_float_abi}-float" ]
|
|
} else if (current_cpu == "mips64el") {
|
|
if (mips_arch_variant == "r6") {
|
|
cflags += [
|
|
"-mips64r6",
|
|
"-Wa,-mips64r6",
|
|
]
|
|
ldflags += [ "-mips64r6" ]
|
|
} else if (mips_arch_variant == "r2") {
|
|
cflags += [
|
|
"-mips64r2",
|
|
"-Wa,-mips64r2",
|
|
]
|
|
ldflags += [ "-mips64r2" ]
|
|
}
|
|
}
|
|
|
|
defines += [ "_FILE_OFFSET_BITS=64" ]
|
|
|
|
if (!is_android) {
|
|
defines += [
|
|
"_LARGEFILE_SOURCE",
|
|
"_LARGEFILE64_SOURCE",
|
|
]
|
|
}
|
|
|
|
# Omit unwind support in official builds to save space. We can use breakpad
|
|
# for these builds.
|
|
if (is_chrome_branded && is_official_build) {
|
|
cflags += [
|
|
"-fno-unwind-tables",
|
|
"-fno-asynchronous-unwind-tables",
|
|
]
|
|
defines += [ "NO_UNWIND_TABLES" ]
|
|
} else {
|
|
cflags += [ "-funwind-tables" ]
|
|
}
|
|
}
|
|
|
|
# Linux/Android common flags setup.
|
|
# ---------------------------------
|
|
if (is_linux || is_android) {
|
|
cflags += [
|
|
"-fPIC",
|
|
"-pipe", # Use pipes for communicating between sub-processes. Faster.
|
|
]
|
|
|
|
ldflags += [
|
|
"-fPIC",
|
|
"-Wl,-z,noexecstack",
|
|
"-Wl,-z,now",
|
|
"-Wl,-z,relro",
|
|
]
|
|
if (!using_sanitizer) {
|
|
ldflags += [ "-Wl,-z,defs" ]
|
|
}
|
|
}
|
|
|
|
# Linux-specific compiler flags setup.
|
|
# ------------------------------------
|
|
if (is_linux) {
|
|
cflags += [ "-pthread" ]
|
|
ldflags += [ "-pthread" ]
|
|
}
|
|
if (use_gold) {
|
|
ldflags += [
|
|
"-B$gold_path",
|
|
|
|
# Newer gccs and clangs support -fuse-ld, use the flag to force gold
|
|
# selection.
|
|
# gcc -- http://gcc.gnu.org/onlinedocs/gcc-4.8.0/gcc/Optimize-Options.html
|
|
"-fuse-ld=gold",
|
|
|
|
# Experimentation found that using four linking threads
|
|
# saved ~20% of link time.
|
|
# https://groups.google.com/a/chromium.org/group/chromium-dev/browse_thread/thread/281527606915bb36
|
|
# Only apply this to the target linker, since the host
|
|
# linker might not be gold, but isn't used much anyway.
|
|
# TODO(raymes): Disable threading because gold is frequently
|
|
# crashing on the bots: crbug.com/161942.
|
|
#"-Wl,--threads",
|
|
#"-Wl,--thread-count=4",
|
|
]
|
|
|
|
if (!is_asan && !is_msan && !is_lsan && !is_tsan) {
|
|
# TODO(brettw) common.gypi has this only for target toolset.
|
|
ldflags += [ "-Wl,--icf=all" ]
|
|
}
|
|
|
|
# TODO(thestig): Make this flag work with GN.
|
|
#if (!is_official_build && !is_chromeos && !(is_asan || is_lsan || is_tsan || is_msan)) {
|
|
# ldflags += [
|
|
# "-Wl,--detect-odr-violations",
|
|
# ]
|
|
#}
|
|
}
|
|
|
|
if (linux_use_bundled_binutils) {
|
|
cflags += [ "-B$binutils_path" ]
|
|
}
|
|
|
|
# Clang-specific compiler flags setup.
|
|
# ------------------------------------
|
|
if (is_clang) {
|
|
cflags += [ "-fcolor-diagnostics" ]
|
|
}
|
|
|
|
# C++11 compiler flags setup.
|
|
# ---------------------------
|
|
if (is_linux || is_android || is_nacl) {
|
|
# gnu++11 instead of c++11 is needed because some code uses typeof() (a
|
|
# GNU extension).
|
|
# TODO(thakis): Eventually switch this to c++11 instead,
|
|
# http://crbug.com/427584
|
|
cflags_cc += [ "-std=gnu++11" ]
|
|
} else if (!is_win) {
|
|
cflags_cc += [ "-std=c++11" ]
|
|
}
|
|
|
|
# Android-specific flags setup.
|
|
# -----------------------------
|
|
if (is_android) {
|
|
cflags += [
|
|
"-ffunction-sections",
|
|
"-funwind-tables",
|
|
"-fno-short-enums",
|
|
]
|
|
if (!is_clang) {
|
|
# Clang doesn't support these flags.
|
|
cflags += [ "-finline-limit=64" ]
|
|
}
|
|
if (is_clang) {
|
|
rebased_android_toolchain_root =
|
|
rebase_path(android_toolchain_root, root_build_dir)
|
|
if (current_cpu == "arm") {
|
|
cflags += [
|
|
# TODO(hans) Enable integrated-as (crbug.com/124610).
|
|
"-no-integrated-as",
|
|
"-B${rebased_android_toolchain_root}/bin", # Else /usr/bin/as gets picked up.
|
|
]
|
|
}
|
|
}
|
|
if (is_asan) {
|
|
# Android build relies on -Wl,--gc-sections removing unreachable code.
|
|
# ASan instrumentation for globals inhibits this and results in a library
|
|
# with unresolvable relocations.
|
|
# TODO(eugenis): find a way to reenable this.
|
|
cflags += [ "-mllvm -asan-globals=0" ]
|
|
}
|
|
|
|
defines += [ "ANDROID" ]
|
|
|
|
# The NDK has these things, but doesn't define the constants
|
|
# to say that it does. Define them here instead.
|
|
defines += [ "HAVE_SYS_UIO_H" ]
|
|
|
|
# Use gold for Android for most CPU architectures.
|
|
if (current_cpu == "x86" || current_cpu == "x64" || current_cpu == "arm") {
|
|
ldflags += [ "-fuse-ld=gold" ]
|
|
if (is_clang) {
|
|
# Let clang find the ld.gold in the NDK.
|
|
ldflags += [ "--gcc-toolchain=$rebased_android_toolchain_root" ]
|
|
}
|
|
|
|
# Use -mstackrealign due to a bug on ia32 Jelly Bean.
|
|
# See crbug.com/521527
|
|
if (current_cpu == "x86") {
|
|
cflags += [ "-mstackrealign" ]
|
|
}
|
|
}
|
|
|
|
ldflags += [
|
|
"-Wl,--no-undefined",
|
|
|
|
# Don't allow visible symbols from libgcc or libc++ to be
|
|
# re-exported.
|
|
"-Wl,--exclude-libs=libgcc.a",
|
|
"-Wl,--exclude-libs=libc++_static.a",
|
|
|
|
# Don't allow visible symbols from libraries that contain
|
|
# assembly code with symbols that aren't hidden properly.
|
|
# http://crbug.com/448386
|
|
"-Wl,--exclude-libs=libvpx_assembly_arm.a",
|
|
]
|
|
if (current_cpu == "arm") {
|
|
ldflags += [
|
|
# Enable identical code folding to reduce size.
|
|
"-Wl,--icf=safe",
|
|
]
|
|
}
|
|
|
|
if (is_clang) {
|
|
if (current_cpu == "arm") {
|
|
_abi_target = "arm-linux-androideabi"
|
|
} else if (current_cpu == "x86") {
|
|
_abi_target = "i686-linux-androideabi"
|
|
} else if (current_cpu == "arm64") {
|
|
# Place holder for arm64 support, not tested.
|
|
_abi_target = "aarch64-linux-androideabi"
|
|
} else if (current_cpu == "x64") {
|
|
# Place holder for x64 support, not tested.
|
|
# TODO: Enable clang support for Android x64. http://crbug.com/346626
|
|
_abi_target = "x86_64-linux-androideabi"
|
|
} else if (current_cpu == "mipsel") {
|
|
# Place holder for mips support, not tested.
|
|
_abi_target = "mipsel-linux-androideabi"
|
|
} else if (current_cpu == "mips64el") {
|
|
# Place holder for mips64 support, not tested.
|
|
_abi_target = "mips64el-linux-androideabi"
|
|
} else {
|
|
assert(false, "Architecture not supported")
|
|
}
|
|
cflags += [
|
|
"-target",
|
|
_abi_target,
|
|
]
|
|
ldflags += [
|
|
"-target",
|
|
_abi_target,
|
|
]
|
|
}
|
|
}
|
|
|
|
# Pass the same C/C++ flags to the objective C/C++ compiler.
|
|
cflags_objc += cflags_c
|
|
cflags_objcc += cflags_cc
|
|
}
|
|
|
|
config("compiler_arm_fpu") {
|
|
if (current_cpu == "arm" && !is_ios) {
|
|
cflags = [ "-mfpu=$arm_fpu" ]
|
|
}
|
|
}
|
|
|
|
# runtime_library -------------------------------------------------------------
|
|
#
|
|
# Sets the runtime library and associated options.
|
|
#
|
|
# How do you determine what should go in here vs. "compiler" above? Consider if
|
|
# a target might choose to use a different runtime library (ignore for a moment
|
|
# if this is possible or reasonable on your system). If such a target would want
|
|
# to change or remove your option, put it in the runtime_library config. If a
|
|
# target wants the option regardless, put it in the compiler config.
|
|
|
|
config("runtime_library") {
|
|
cflags = []
|
|
defines = []
|
|
ldflags = []
|
|
lib_dirs = []
|
|
libs = []
|
|
|
|
if (is_component_build) {
|
|
# Component mode: dynamic CRT.
|
|
defines += [ "COMPONENT_BUILD" ]
|
|
if (is_win) {
|
|
# Since the library is shared, it requires exceptions or will give errors
|
|
# about things not matching, so keep exceptions on.
|
|
if (is_debug) {
|
|
cflags += [ "/MDd" ]
|
|
} else {
|
|
cflags += [ "/MD" ]
|
|
}
|
|
}
|
|
} else {
|
|
if (is_win && current_os != "win") {
|
|
# WindowsRT: use the dynamic CRT.
|
|
if (is_debug) {
|
|
cflags += [ "/MDd" ]
|
|
} else {
|
|
cflags += [ "/MD" ]
|
|
}
|
|
} else if (is_win) {
|
|
# Desktop Windows: static CRT.
|
|
if (is_debug) {
|
|
cflags += [ "/MTd" ]
|
|
} else {
|
|
cflags += [ "/MT" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
if (is_win) {
|
|
defines += [
|
|
"__STD_C",
|
|
"_CRT_RAND_S",
|
|
"_CRT_SECURE_NO_DEPRECATE",
|
|
"_HAS_EXCEPTIONS=0",
|
|
"_SCL_SECURE_NO_DEPRECATE",
|
|
]
|
|
}
|
|
|
|
# Android standard library setup.
|
|
if (is_android) {
|
|
if (is_clang) {
|
|
# Work around incompatibilities between bionic and clang headers.
|
|
defines += [
|
|
"__compiler_offsetof=__builtin_offsetof",
|
|
"nan=__builtin_nan",
|
|
]
|
|
}
|
|
|
|
defines += [ "__GNU_SOURCE=1" ] # Necessary for clone().
|
|
|
|
# TODO(jdduke) Re-enable on mips after resolving linking
|
|
# issues with libc++ (crbug.com/456380).
|
|
if (current_cpu != "mipsel" && current_cpu != "mips64el") {
|
|
ldflags += [ "-Wl,--warn-shared-textrel" ]
|
|
}
|
|
ldflags += [ "-nostdlib" ]
|
|
|
|
# NOTE: The libc++ header include paths below are specified in cflags
|
|
# rather than include_dirs because they need to come after include_dirs.
|
|
# Think of them like system headers, but don't use '-isystem' because the
|
|
# arm-linux-androideabi-4.4.3 toolchain (circa Gingerbread) will exhibit
|
|
# strange errors. The include ordering here is important; change with
|
|
# caution.
|
|
cflags += [
|
|
"-isystem" +
|
|
rebase_path("$android_libcpp_root/libcxx/include", root_build_dir),
|
|
"-isystem" + rebase_path(
|
|
"$android_ndk_root/sources/cxx-stl/llvm-libc++abi/libcxxabi/include",
|
|
root_build_dir),
|
|
"-isystem" +
|
|
rebase_path("$android_ndk_root/sources/android/support/include",
|
|
root_build_dir),
|
|
]
|
|
|
|
lib_dirs += [ "$android_libcpp_root/libs/$android_app_abi" ]
|
|
libs += [ "$android_libcpp_library" ]
|
|
|
|
if (current_cpu == "mipsel") {
|
|
libs += [
|
|
# ld linker is used for mips Android, and ld does not accept library
|
|
# absolute path prefixed by "-l"; Since libgcc does not exist in mips
|
|
# sysroot the proper library will be linked.
|
|
# TODO(gordanac): Remove once gold linker is used for mips Android.
|
|
"gcc",
|
|
]
|
|
} else {
|
|
libs += [
|
|
# Manually link the libgcc.a that the cross compiler uses. This is
|
|
# absolute because the linker will look inside the sysroot if it's not.
|
|
rebase_path(android_libgcc_file),
|
|
]
|
|
}
|
|
|
|
libs += [
|
|
"c",
|
|
"dl",
|
|
"m",
|
|
]
|
|
|
|
# Clang with libc++ does not require an explicit atomic library reference.
|
|
if (!is_clang) {
|
|
libs += [ "atomic" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
# default_warning_flags collects all warning flags that are used by default.
|
|
# This is in a variable instead of a config so that it can be used in
|
|
# both chromium_code and no_chromium_code. This way these flags are guaranteed
|
|
# to appear on the compile command line after -Wall.
|
|
|
|
default_warning_flags = []
|
|
default_warning_flags_cc = []
|
|
if (is_win) {
|
|
default_warning_flags += [
|
|
# Treat warnings as errors.
|
|
"/WX",
|
|
|
|
# Warnings permanently disabled:
|
|
|
|
# C4127: conditional expression is constant
|
|
# This warning can in theory catch dead code and other problems, but
|
|
# triggers in far too many desirable cases where the conditional
|
|
# expression is either set by macros or corresponds some legitimate
|
|
# compile-time constant expression (due to constant template args,
|
|
# conditionals comparing the sizes of different types, etc.). Some of
|
|
# these can be worked around, but it's not worth it.
|
|
"/wd4127",
|
|
|
|
# C4251: 'identifier' : class 'type' needs to have dll-interface to be
|
|
# used by clients of class 'type2'
|
|
# This is necessary for the shared library build.
|
|
"/wd4251",
|
|
|
|
# C4351: new behavior: elements of array 'array' will be default
|
|
# initialized
|
|
# This is a silly "warning" that basically just alerts you that the
|
|
# compiler is going to actually follow the language spec like it's
|
|
# supposed to, instead of not following it like old buggy versions did.
|
|
# There's absolutely no reason to turn this on.
|
|
"/wd4351",
|
|
|
|
# C4355: 'this': used in base member initializer list
|
|
# It's commonly useful to pass |this| to objects in a class' initializer
|
|
# list. While this warning can catch real bugs, most of the time the
|
|
# constructors in question don't attempt to call methods on the passed-in
|
|
# pointer (until later), and annotating every legit usage of this is
|
|
# simply more hassle than the warning is worth.
|
|
"/wd4355",
|
|
|
|
# C4503: 'identifier': decorated name length exceeded, name was
|
|
# truncated
|
|
# This only means that some long error messages might have truncated
|
|
# identifiers in the presence of lots of templates. It has no effect on
|
|
# program correctness and there's no real reason to waste time trying to
|
|
# prevent it.
|
|
"/wd4503",
|
|
|
|
# Warning C4589 says: "Constructor of abstract class ignores
|
|
# initializer for virtual base class." Disable this warning because it
|
|
# is flaky in VS 2015 RTM. It triggers on compiler generated
|
|
# copy-constructors in some cases.
|
|
"/wd4589",
|
|
|
|
# C4611: interaction between 'function' and C++ object destruction is
|
|
# non-portable
|
|
# This warning is unavoidable when using e.g. setjmp/longjmp. MSDN
|
|
# suggests using exceptions instead of setjmp/longjmp for C++, but
|
|
# Chromium code compiles without exception support. We therefore have to
|
|
# use setjmp/longjmp for e.g. JPEG decode error handling, which means we
|
|
# have to turn off this warning (and be careful about how object
|
|
# destruction happens in such cases).
|
|
"/wd4611",
|
|
|
|
# Warnings to evaluate and possibly fix/reenable later:
|
|
|
|
"/wd4100", # Unreferenced formal function parameter.
|
|
"/wd4121", # Alignment of a member was sensitive to packing.
|
|
"/wd4244", # Conversion: possible loss of data.
|
|
"/wd4481", # Nonstandard extension: override specifier.
|
|
"/wd4505", # Unreferenced local function has been removed.
|
|
"/wd4510", # Default constructor could not be generated.
|
|
"/wd4512", # Assignment operator could not be generated.
|
|
"/wd4610", # Class can never be instantiated, constructor required.
|
|
"/wd4995", # 'X': name was marked as #pragma deprecated
|
|
"/wd4996", # Deprecated function warning.
|
|
]
|
|
|
|
# VS xtree header file needs to be patched or 4702 (unreachable code
|
|
# warning) is reported if _HAS_EXCEPTIONS=0. Disable the warning if xtree is
|
|
# not patched.
|
|
if (!msvs_xtree_patched &&
|
|
exec_script("../../win_is_xtree_patched.py", [], "value") == 0) {
|
|
default_warning_flags += [ "/wd4702" ] # Unreachable code.
|
|
}
|
|
|
|
# Building with Clang on Windows is a work in progress and very
|
|
# experimental. See crbug.com/82385.
|
|
# Keep this in sync with the similar block in build/common.gypi
|
|
if (is_clang) {
|
|
default_warning_flags += [
|
|
# TODO(hans): Make this list shorter eventually, http://crbug.com/504657
|
|
"-Qunused-arguments", # http://crbug.com/504658
|
|
"-Wno-microsoft", # http://crbug.com/505296
|
|
"-Wno-unknown-pragmas", # http://crbug.com/505314
|
|
"-Wno-unused-value", # http://crbug.com/505318
|
|
]
|
|
}
|
|
} else {
|
|
# Common GCC warning setup.
|
|
default_warning_flags += [
|
|
# Enables.
|
|
"-Wendif-labels", # Weird old-style text after an #endif.
|
|
"-Werror", # Warnings as errors.
|
|
|
|
# Disables.
|
|
"-Wno-missing-field-initializers", # "struct foo f = {0};"
|
|
"-Wno-unused-parameter", # Unused function parameters.
|
|
]
|
|
|
|
if (is_mac) {
|
|
default_warning_flags += [ "-Wnewline-eof" ]
|
|
if (!is_nacl) {
|
|
# When compiling Objective-C, warns if a method is used whose
|
|
# availability is newer than the deployment target. This is not
|
|
# required when compiling Chrome for iOS.
|
|
default_warning_flags += [ "-Wpartial-availability" ]
|
|
}
|
|
}
|
|
|
|
if (gcc_version >= 48) {
|
|
default_warning_flags_cc += [
|
|
# See comment for -Wno-c++11-narrowing.
|
|
"-Wno-narrowing",
|
|
]
|
|
if (!is_clang) {
|
|
default_warning_flags_cc += [
|
|
# TODO(thakis): Remove, http://crbug.com/263960
|
|
"-Wno-literal-suffix",
|
|
]
|
|
}
|
|
}
|
|
|
|
# Suppress warnings about ABI changes on ARM (Clang doesn't give this
|
|
# warning).
|
|
if (current_cpu == "arm" && !is_clang) {
|
|
default_warning_flags += [ "-Wno-psabi" ]
|
|
}
|
|
|
|
if (is_android) {
|
|
# Disable any additional warnings enabled by the Android build system but
|
|
# which chromium does not build cleanly with (when treating warning as
|
|
# errors).
|
|
default_warning_flags += [
|
|
"-Wno-extra",
|
|
"-Wno-ignored-qualifiers",
|
|
"-Wno-type-limits",
|
|
]
|
|
default_warning_flags_cc += [
|
|
# Disabling c++0x-compat should be handled in WebKit, but
|
|
# this currently doesn't work because gcc_version is not set
|
|
# correctly when building with the Android build system.
|
|
# TODO(torne): Fix this in WebKit.
|
|
"-Wno-error=c++0x-compat",
|
|
|
|
# Other things unrelated to -Wextra:
|
|
"-Wno-non-virtual-dtor",
|
|
"-Wno-sign-promo",
|
|
]
|
|
}
|
|
|
|
if (gcc_version >= 48) {
|
|
# Don't warn about the "typedef 'foo' locally defined but not used"
|
|
# for gcc 4.8.
|
|
# TODO: remove this flag once all builds work. See crbug.com/227506
|
|
default_warning_flags += [ "-Wno-unused-local-typedefs" ]
|
|
}
|
|
}
|
|
if (is_clang) {
|
|
default_warning_flags += [
|
|
# This warns on using ints as initializers for floats in
|
|
# initializer lists (e.g. |int a = f(); CGSize s = { a, a };|),
|
|
# which happens in several places in chrome code. Not sure if
|
|
# this is worth fixing.
|
|
"-Wno-c++11-narrowing",
|
|
|
|
# Don't die on dtoa code that uses a char as an array index.
|
|
# This is required solely for base/third_party/dmg_fp/dtoa.cc.
|
|
# TODO(brettw) move this to that project then!
|
|
"-Wno-char-subscripts",
|
|
|
|
# Warns on switches on enums that cover all enum values but
|
|
# also contain a default: branch. Chrome is full of that.
|
|
"-Wno-covered-switch-default",
|
|
|
|
# Clang considers the `register` keyword as deprecated, but e.g.
|
|
# code generated by flex (used in angle) contains that keyword.
|
|
# http://crbug.com/255186
|
|
"-Wno-deprecated-register",
|
|
|
|
# TODO(thakis): This used to be implied by -Wno-unused-function,
|
|
# which we no longer use. Check if it makes sense to remove
|
|
# this as well. http://crbug.com/316352
|
|
"-Wno-unneeded-internal-declaration",
|
|
]
|
|
|
|
if (is_posix && !is_mac && !is_ios) {
|
|
default_warning_flags += [
|
|
# TODO(thakis): Remove, http://crbug.com/263960
|
|
"-Wno-reserved-user-defined-literal",
|
|
]
|
|
}
|
|
|
|
# NaCl's Clang compiler and Chrome's hermetic Clang compiler will almost
|
|
# always have different versions. Certain flags may not be recognized by
|
|
# one version or the other.
|
|
if (!is_nacl) {
|
|
# Flags NaCl does not recognize.
|
|
default_warning_flags += [
|
|
# TODO(hans): Get this cleaned up, http://crbug.com/428099
|
|
"-Wno-inconsistent-missing-override",
|
|
|
|
# TODO(thakis): Enable this, crbug.com/507717
|
|
"-Wno-shift-negative-value",
|
|
]
|
|
}
|
|
}
|
|
|
|
# chromium_code ---------------------------------------------------------------
|
|
#
|
|
# Toggles between higher and lower warnings for code that is (or isn't)
|
|
# part of Chromium.
|
|
|
|
config("chromium_code") {
|
|
if (is_win) {
|
|
cflags = [ "/W4" ] # Warning level 4.
|
|
} else {
|
|
cflags = [
|
|
"-Wall",
|
|
|
|
# GCC turns on -Wsign-compare for C++ under -Wall, but clang doesn't,
|
|
# so we specify it explicitly.
|
|
# TODO(fischman): remove this if http://llvm.org/PR10448 obsoletes it.
|
|
# http://code.google.com/p/chromium/issues/detail?id=90453
|
|
"-Wsign-compare",
|
|
]
|
|
|
|
# In Chromium code, we define __STDC_foo_MACROS in order to get the
|
|
# C99 macros on Mac and Linux.
|
|
defines = [
|
|
"__STDC_CONSTANT_MACROS",
|
|
"__STDC_FORMAT_MACROS",
|
|
]
|
|
|
|
if (!is_debug && !using_sanitizer &&
|
|
(!is_linux || !is_clang || is_official_build)) {
|
|
# _FORTIFY_SOURCE isn't really supported by Clang now, see
|
|
# http://llvm.org/bugs/show_bug.cgi?id=16821.
|
|
# It seems to work fine with Ubuntu 12 headers though, so use it in
|
|
# official builds.
|
|
#
|
|
# Non-chromium code is not guaranteed to compile cleanly with
|
|
# _FORTIFY_SOURCE. Also, fortified build may fail when optimizations are
|
|
# disabled, so only do that for Release build.
|
|
defines += [ "_FORTIFY_SOURCE=2" ]
|
|
}
|
|
}
|
|
cflags += default_warning_flags
|
|
cflags_cc = default_warning_flags_cc
|
|
}
|
|
config("no_chromium_code") {
|
|
cflags = []
|
|
cflags_cc = []
|
|
defines = []
|
|
|
|
if (is_win) {
|
|
cflags += [
|
|
"/W3", # Warning level 3.
|
|
"/wd4800", # Disable warning when forcing value to bool.
|
|
"/wd4267", # TODO(jschuh): size_t to int.
|
|
"/wd4996", # Deprecated function warning.
|
|
]
|
|
defines += [
|
|
"_CRT_NONSTDC_NO_WARNINGS",
|
|
"_CRT_NONSTDC_NO_DEPRECATE",
|
|
]
|
|
}
|
|
|
|
if (is_linux) {
|
|
# Don't warn about ignoring the return value from e.g. close(). This is
|
|
# off by default in some gccs but on by default in others. BSD systems do
|
|
# not support this option, since they are usually using gcc 4.2.1, which
|
|
# does not have this flag yet.
|
|
cflags += [ "-Wno-unused-result" ]
|
|
}
|
|
|
|
if (is_clang) {
|
|
cflags += [
|
|
# TODO(thakis): Move this suppression into individual third-party
|
|
# libraries as required. http://crbug.com/505316.
|
|
"-Wno-unused-function",
|
|
|
|
# Lots of third-party libraries have unused variables. Instead of
|
|
# suppressing them individually, we just blanket suppress them here.
|
|
"-Wno-unused-variable",
|
|
]
|
|
}
|
|
|
|
if (is_linux || is_android) {
|
|
cflags += [
|
|
# Don't warn about printf format problems. This is off by default in gcc
|
|
# but on in Ubuntu's gcc(!).
|
|
"-Wno-format",
|
|
]
|
|
cflags_cc += [
|
|
# Don't warn about hash_map in third-party code.
|
|
"-Wno-deprecated",
|
|
]
|
|
}
|
|
cflags += default_warning_flags
|
|
cflags_cc += default_warning_flags_cc
|
|
}
|
|
|
|
# rtti ------------------------------------------------------------------------
|
|
#
|
|
# Allows turning Run-Time Type Identification on or off.
|
|
|
|
config("rtti") {
|
|
if (is_win) {
|
|
cflags_cc = [ "/GR" ]
|
|
}
|
|
}
|
|
config("no_rtti") {
|
|
if (is_win) {
|
|
cflags_cc = [ "/GR-" ]
|
|
} else {
|
|
cflags_cc = [ "-fno-rtti" ]
|
|
cflags_objcc = cflags_cc
|
|
}
|
|
}
|
|
|
|
# Warnings ---------------------------------------------------------------------
|
|
|
|
# This will generate warnings when using Clang if code generates exit-time
|
|
# destructors, which will slow down closing the program.
|
|
# TODO(thakis): Make this a blacklist instead, http://crbug.com/101600
|
|
config("wexit_time_destructors") {
|
|
# TODO: Enable on Windows too, http://crbug.com/404525
|
|
if (is_clang && !is_win) {
|
|
cflags = [ "-Wexit-time-destructors" ]
|
|
}
|
|
}
|
|
|
|
# On Windows compiling on x64, VC will issue a warning when converting
|
|
# size_t to int because it will truncate the value. Our code should not have
|
|
# these warnings and one should use a static_cast or a checked_cast for the
|
|
# conversion depending on the case. However, a lot of code still needs to be
|
|
# fixed. Apply this config to such targets to disable the warning.
|
|
#
|
|
# Note that this can be applied regardless of platform and architecture to
|
|
# clean up the call sites. This will only apply the flag when necessary.
|
|
#
|
|
# TODO(jschuh): crbug.com/167187 fix this and delete this config.
|
|
config("no_size_t_to_int_warning") {
|
|
if (is_win && current_cpu == "x64") {
|
|
cflags = [ "/wd4267" ]
|
|
}
|
|
}
|
|
|
|
# Some code presumes that pointers to structures/objects are compatible
|
|
# regardless of whether what they point to is already known to be valid.
|
|
# gcc 4.9 and earlier had no way of suppressing this warning without
|
|
# supressing the rest of them. Here we centralize the identification of
|
|
# the gcc 4.9 toolchains.
|
|
config("no_incompatible_pointer_warnings") {
|
|
cflags = []
|
|
if (is_clang) {
|
|
cflags += [ "-Wno-incompatible-pointer-types" ]
|
|
} else if (current_cpu == "mipsel") {
|
|
cflags += [ "-w" ]
|
|
} else if (is_chromeos && current_cpu == "arm") {
|
|
cflags += [ "-w" ]
|
|
}
|
|
}
|
|
|
|
# Optimization -----------------------------------------------------------------
|
|
#
|
|
# Note that BUILDCONFIG.gn sets up a variable "default_optimization_config"
|
|
# which it will assign to the config it implicitly applies to every target. If
|
|
# you want to override the optimization level for your target, remove this
|
|
# config (which will expand differently for debug or release builds), and then
|
|
# add back the one you want to override it with:
|
|
#
|
|
# configs -= default_optimization_config
|
|
# configs += [ "//build/config/compiler/optimize_max" ]
|
|
|
|
# Shared settings for both "optimize" and "optimize_max" configs.
|
|
# IMPORTANT: On Windows "/O1" and "/O2" must go before the common flags.
|
|
if (is_win) {
|
|
common_optimize_on_cflags = [
|
|
"/Ob2", # Both explicit and auto inlining.
|
|
"/Oy-", # Disable omitting frame pointers, must be after /O2.
|
|
]
|
|
if (!is_asan) {
|
|
common_optimize_on_cflags += [
|
|
# Put data in separate COMDATs. This allows the linker
|
|
# to put bit-identical constants at the same address even if
|
|
# they're unrelated constants, which saves binary size.
|
|
# This optimization can't be used when ASan is enabled because
|
|
# it is not compatible with the ASan ODR checker.
|
|
"/Gw",
|
|
]
|
|
}
|
|
common_optimize_on_ldflags = [ "/OPT:REF" ]
|
|
} else {
|
|
common_optimize_on_cflags = [
|
|
# 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",
|
|
]
|
|
common_optimize_on_ldflags = []
|
|
|
|
if (is_android) {
|
|
if (!using_sanitizer) {
|
|
common_optimize_on_cflags += [ "-fomit-frame-pointer" ]
|
|
}
|
|
|
|
# TODO(jdduke) Re-enable on mips after resolving linking
|
|
# issues with libc++ (crbug.com/456380).
|
|
if (current_cpu != "mipsel" && current_cpu != "mips64el") {
|
|
common_optimize_on_ldflags += [
|
|
# Warn in case of text relocations.
|
|
"-Wl,--warn-shared-textrel",
|
|
]
|
|
}
|
|
}
|
|
|
|
if (is_mac || is_ios) {
|
|
if (symbol_level == 2) {
|
|
# Mac dead code stripping requires symbols.
|
|
common_optimize_on_ldflags += [ "-Wl,-dead_strip" ]
|
|
}
|
|
} else {
|
|
# Non-Mac Posix linker flags.
|
|
common_optimize_on_ldflags += [
|
|
# Specifically tell the linker to perform optimizations.
|
|
# See http://lwn.net/Articles/192624/ .
|
|
"-Wl,-O1",
|
|
"-Wl,--gc-sections",
|
|
]
|
|
|
|
if (!using_sanitizer) {
|
|
# Functions interposed by the sanitizers can make ld think
|
|
# that some libraries aren't needed when they actually are,
|
|
# http://crbug.com/234010. As workaround, disable --as-needed.
|
|
common_optimize_on_ldflags += [ "-Wl,--as-needed" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
# Default "optimization on" config. On Windows, this favors size over speed.
|
|
config("optimize") {
|
|
if (is_win) {
|
|
# Favor size over speed, /O1 must be before the common flags. The GYP
|
|
# build also specifies /Os and /GF but these are implied by /O1.
|
|
cflags = [ "/O1" ] + common_optimize_on_cflags + [ "/Oi" ]
|
|
} else if (is_android || is_ios) {
|
|
cflags = [ "-Os" ] + common_optimize_on_cflags # Favor size over speed.
|
|
} else {
|
|
cflags = [ "-O2" ] + common_optimize_on_cflags
|
|
}
|
|
ldflags = common_optimize_on_ldflags
|
|
}
|
|
|
|
# Turn off optimizations.
|
|
config("no_optimize") {
|
|
if (is_win) {
|
|
cflags = [
|
|
"/Od", # Disable optimization.
|
|
"/Ob0", # Disable all inlining (on by default).
|
|
"/RTC1", # Runtime checks for stack frame and uninitialized variables.
|
|
]
|
|
} else if (is_android && !android_full_debug) {
|
|
# On Android we kind of optimize some things that don't affect debugging
|
|
# much even when optimization is disabled to get the binary size down.
|
|
cflags = [
|
|
"-Os",
|
|
"-fdata-sections",
|
|
"-ffunction-sections",
|
|
]
|
|
if (!using_sanitizer) {
|
|
cflags += [ "-fomit-frame-pointer" ]
|
|
}
|
|
ldflags = common_optimize_on_ldflags
|
|
} else {
|
|
cflags = [ "-O0" ]
|
|
}
|
|
}
|
|
|
|
# Turns up the optimization level. On Windows, this implies whole program
|
|
# optimization and link-time code generation which is very expensive and should
|
|
# be used sparingly.
|
|
config("optimize_max") {
|
|
ldflags = common_optimize_on_ldflags
|
|
if (is_win) {
|
|
# Favor speed over size, /O2 must be before the common flags. The GYP
|
|
# build also specifies /Ot, /Oi, and /GF, but these are implied by /O2.
|
|
cflags = [ "/O2" ] + common_optimize_on_cflags
|
|
if (is_official_build) {
|
|
# TODO(GYP): TODO(dpranke): Should these only be on in an official
|
|
# build, or on all the time? For now we'll require official build so
|
|
# that the compile is clean.
|
|
cflags += [
|
|
"/GL", # Whole program optimization.
|
|
|
|
# Disable Warning 4702 ("Unreachable code") for the WPO/PGO builds.
|
|
# Probably anything that this would catch that wouldn't be caught in a
|
|
# normal build isn't going to actually be a bug, so the incremental
|
|
# value of C4702 for PGO builds is likely very small.
|
|
"/wd4702",
|
|
]
|
|
ldflags += [ "/LTCG" ]
|
|
}
|
|
} else {
|
|
cflags = [ "-O2" ] + common_optimize_on_cflags
|
|
}
|
|
}
|
|
|
|
# Symbols ----------------------------------------------------------------------
|
|
|
|
config("symbols") {
|
|
if (is_win) {
|
|
import("//build/toolchain/goma.gni")
|
|
if (use_goma) {
|
|
cflags = [ "/Z7" ] # No PDB file
|
|
} else {
|
|
cflags = [ "/Zi" ] # Produce PDB file, no edit and continue.
|
|
}
|
|
if (is_win_fastlink) {
|
|
# Tell VS 2015+ to create a PDB that references debug
|
|
# information in .obj and .lib files instead of copying
|
|
# it all. This flag is incompatible with /PROFILE
|
|
ldflags = [ "/DEBUG:FASTLINK" ]
|
|
} else {
|
|
ldflags = [ "/DEBUG" ]
|
|
}
|
|
} else {
|
|
cflags = [ "-g2" ]
|
|
if (use_debug_fission) {
|
|
cflags += [ "-gsplit-dwarf" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
config("minimal_symbols") {
|
|
if (is_win) {
|
|
# Linker symbols for backtraces only.
|
|
if (is_win_fastlink) {
|
|
# Tell VS 2015+ to create a PDB that references debug
|
|
# information in .obj and .lib files instead of copying
|
|
# it all. This flag is incompatible with /PROFILE
|
|
ldflags = [ "/DEBUG:FASTLINK" ]
|
|
} else {
|
|
ldflags = [ "/DEBUG" ]
|
|
}
|
|
} else {
|
|
cflags = [ "-g1" ]
|
|
if (use_debug_fission) {
|
|
cflags += [ "-gsplit-dwarf" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
config("no_symbols") {
|
|
if (!is_win) {
|
|
cflags = [ "-g0" ]
|
|
}
|
|
}
|