| Index: build/config/compiler/BUILD.gn
|
| diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
|
| new file mode 100644
|
| index 0000000000000000000000000000000000000000..5bbf6195df155d1917fbfd9700ec758168992fbe
|
| --- /dev/null
|
| +++ b/build/config/compiler/BUILD.gn
|
| @@ -0,0 +1,1126 @@
|
| +# 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")
|
| +}
|
| +import("//build/config/nacl/config.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"
|
| +
|
| + # 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"
|
| +
|
| + # 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 = use_gold && linux_use_bundled_binutils && !use_ccache
|
| +}
|
| +
|
| +# 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
|
| +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") {
|
| + asmflags = []
|
| + cflags = []
|
| + cflags_c = []
|
| + cflags_cc = []
|
| + ldflags = []
|
| + defines = []
|
| +
|
| + # Common GCC compiler flags setup.
|
| + # --------------------------------
|
| + cflags += [ "-fno-strict-aliasing" ] # See http://crbug.com/32204
|
| + cflags_cc += [
|
| + # 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_linux) {
|
| + cflags += [
|
| + "-fstack-protector",
|
| + "--param=ssp-buffer-size=4",
|
| + ]
|
| + }
|
| +
|
| + # Linker warnings.
|
| + if (!is_mac && !is_ios) {
|
| + 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") {
|
| + common_mac_flags += [
|
| + "-arch",
|
| + "armv7",
|
| + ]
|
| + }
|
| +
|
| + 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${mips_float_abi}-float" ]
|
| + } else if (current_cpu == "mips64el") {
|
| + if (mips_arch_variant == "r6") {
|
| + cflags += [
|
| + "-mips64r6",
|
| + "-Wa,-mips64r6",
|
| + ]
|
| + ldflags += [ "-mips64r6" ]
|
| + } else if (mips_arch_variant == "r2") {
|
| + cflags += [
|
| + "-mips64r2",
|
| + "-Wa,-mips64r2",
|
| + ]
|
| + ldflags += [ "-mips64r2" ]
|
| + }
|
| + }
|
| +
|
| + defines += [ "_FILE_OFFSET_BITS=64" ]
|
| +
|
| + if (!is_android) {
|
| + defines += [
|
| + "_LARGEFILE_SOURCE",
|
| + "_LARGEFILE64_SOURCE",
|
| + ]
|
| + }
|
| +
|
| + # Omit unwind support in official builds to save space. We can use breakpad
|
| + # for these builds.
|
| + if (is_chrome_branded && is_official_build) {
|
| + cflags += [
|
| + "-fno-unwind-tables",
|
| + "-fno-asynchronous-unwind-tables",
|
| + ]
|
| + defines += [ "NO_UNWIND_TABLES" ]
|
| + } else {
|
| + cflags += [ "-funwind-tables" ]
|
| + }
|
| +
|
| + if (is_clang && !is_nacl && !is_debug) {
|
| + # Non-unique section names appears to make linker dead stripping
|
| + # less effective. See http://crbug.com/483026#c20
|
| + # TODO(hans): Remove this if resolved upstream.
|
| + cflags += [ "-funique-section-names" ]
|
| + }
|
| + }
|
| +
|
| + # Linux/Android common flags setup.
|
| + # ---------------------------------
|
| + if (is_linux || is_android) {
|
| + cflags += [
|
| + "-fPIC",
|
| + "-pipe", # Use pipes for communicating between sub-processes. Faster.
|
| + ]
|
| +
|
| + ldflags += [
|
| + "-fPIC",
|
| + "-Wl,-z,noexecstack",
|
| + "-Wl,-z,now",
|
| + "-Wl,-z,relro",
|
| + ]
|
| + if (!using_sanitizer) {
|
| + ldflags += [ "-Wl,-z,defs" ]
|
| + }
|
| + }
|
| +
|
| + # Linux-specific compiler flags setup.
|
| + # ------------------------------------
|
| + if (is_linux) {
|
| + cflags += [ "-pthread" ]
|
| + ldflags += [ "-pthread" ]
|
| + }
|
| + if (use_gold) {
|
| + gold_path = rebase_path("//third_party/binutils/Linux_x64/Release/bin",
|
| + root_build_dir)
|
| + ldflags += [
|
| + "-B$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.
|
| + if (current_cpu == "x64") {
|
| + # --icf=safe disables much more folding on x86_64 than elsewhere, see
|
| + # http://crbug.com/492177. Turning it on saves over 12 MB of binary
|
| + # size, but it seems to regress cold startup time by over a second
|
| + # (see http://crbug.com/492809).
|
| + # TODO(thakis): Check if disabling ICF would inmprove android cold start
|
| + # times by several seconds too.
|
| + ldflags += [ "-Wl,--icf=safe" ]
|
| + } else {
|
| + ldflags += [ "-Wl,--icf=all" ]
|
| + }
|
| + }
|
| + }
|
| +
|
| + if (linux_use_bundled_binutils) {
|
| + binutils_path = rebase_path("//third_party/binutils/Linux_x64/Release/bin",
|
| + root_build_dir)
|
| + cflags += [ "-B$binutils_path" ]
|
| + }
|
| +
|
| + # Clang-specific compiler flags setup.
|
| + # ------------------------------------
|
| + if (is_clang) {
|
| + cflags += [ "-fcolor-diagnostics" ]
|
| + }
|
| +
|
| + # C++11 compiler flags setup.
|
| + # ---------------------------
|
| + if (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 {
|
| + 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_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=" +
|
| + rebase_path(android_toolchain_root, root_build_dir) ]
|
| + }
|
| + }
|
| +
|
| + 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") {
|
| + cflags += [ "-target arm-linux-androideabi" ]
|
| + ldflags += [ "-target arm-linux-androideabi" ]
|
| + } else if (current_cpu == "x86") {
|
| + cflags += [ "-target x86-linux-androideabi" ]
|
| + ldflags += [ "-target x86-linux-androideabi" ]
|
| + }
|
| + }
|
| + }
|
| +
|
| + # Assign any flags set for the C compiler to asmflags so that they are sent
|
| + # to the assembler.
|
| + asmflags += cflags
|
| + asmflags += cflags_c
|
| +}
|
| +
|
| +# This provides the basic options to select the target CPU and ABI.
|
| +# It is factored out of "compiler" so that special cases can use this
|
| +# without using everything that "compiler" brings in. Options that
|
| +# tweak code generation for a particular CPU do not belong here!
|
| +# See "compiler_codegen", below.
|
| +config("compiler_cpu_abi") {
|
| + cflags = []
|
| + ldflags = []
|
| +
|
| + if (is_posix && !(is_mac || is_ios)) {
|
| + # 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" ]
|
| + } else if (current_cpu == "arm") {
|
| + if (is_clang && !is_android && !is_nacl) {
|
| + cflags += [
|
| + "-target",
|
| + "arm-linux-gnueabihf",
|
| + ]
|
| + ldflags += [
|
| + "-target",
|
| + "arm-linux-gnueabihf",
|
| + ]
|
| + }
|
| + if (!is_nacl) {
|
| + cflags += [
|
| + "-march=$arm_arch",
|
| + "-mfloat-abi=$arm_float_abi",
|
| + ]
|
| + if (arm_use_thumb) {
|
| + cflags += [ "-mthumb" ]
|
| + if (is_android && !is_clang) {
|
| + # Clang doesn't support this option.
|
| + cflags += [ "-mthumb-interwork" ]
|
| + }
|
| + }
|
| + }
|
| + if (arm_tune != "") {
|
| + cflags += [ "-mtune=$arm_tune" ]
|
| + }
|
| + } 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" ]
|
| + }
|
| + }
|
| + }
|
| +
|
| + asmflags = cflags
|
| +}
|
| +
|
| +config("compiler_arm_fpu") {
|
| + if (current_cpu == "arm" && !is_ios) {
|
| + cflags = [ "-mfpu=$arm_fpu" ]
|
| + asmflags = cflags
|
| + }
|
| +}
|
| +
|
| +# runtime_library -------------------------------------------------------------
|
| +#
|
| +# Sets the runtime library and associated options.
|
| +#
|
| +# How do you determine what should go in here vs. "compiler" above? Consider if
|
| +# a target might choose to use a different runtime library (ignore for a moment
|
| +# if this is possible or reasonable on your system). If such a target would want
|
| +# to change or remove your option, put it in the runtime_library config. If a
|
| +# target wants the option regardless, put it in the compiler config.
|
| +
|
| +config("runtime_library") {
|
| + cflags = []
|
| + defines = []
|
| + ldflags = []
|
| + lib_dirs = []
|
| + libs = []
|
| +
|
| + if (is_component_build) {
|
| + # Component mode: dynamic CRT.
|
| + defines += [ "COMPONENT_BUILD" ]
|
| + }
|
| +
|
| + # Android standard library setup.
|
| + if (is_android) {
|
| + if (is_clang) {
|
| + # Work around incompatibilities between bionic and clang headers.
|
| + defines += [
|
| + "__compiler_offsetof=__builtin_offsetof",
|
| + "nan=__builtin_nan",
|
| + ]
|
| + }
|
| +
|
| + defines += [ "__GNU_SOURCE=1" ] # Necessary for clone().
|
| +
|
| + # TODO(jdduke) Re-enable on mips after resolving linking
|
| + # issues with libc++ (crbug.com/456380).
|
| + if (current_cpu != "mipsel" && current_cpu != "mips64el") {
|
| + ldflags += [ "-Wl,--warn-shared-textrel" ]
|
| + }
|
| + ldflags += [ "-nostdlib" ]
|
| +
|
| + # NOTE: The libc++ header include paths below are specified in cflags
|
| + # rather than include_dirs because they need to come after include_dirs.
|
| + # Think of them like system headers, but don't use '-isystem' because the
|
| + # arm-linux-androideabi-4.4.3 toolchain (circa Gingerbread) will exhibit
|
| + # strange errors. The include ordering here is important; change with
|
| + # caution.
|
| + android_libcpp_root = "$android_ndk_root/sources/cxx-stl/llvm-libc++"
|
| +
|
| + 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/$android_app_abi" ]
|
| +
|
| + if (component_mode == "shared_library") {
|
| + android_libcpp_library = "c++_shared"
|
| + } else {
|
| + android_libcpp_library = "c++_static"
|
| + }
|
| +
|
| + libs += [ "$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 = []
|
| +
|
| +# 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};"
|
| +]
|
| +
|
| +if (is_mac) {
|
| + 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",
|
| +
|
| + # 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",
|
| + ]
|
| +
|
| + # 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 (Clang 3.7) does not recognize.
|
| + default_warning_flags += [
|
| + # TODO(smklein): 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") {
|
| + 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_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-logical-not-parentheses",
|
| + "-Wno-unused-result",
|
| + ]
|
| + }
|
| +
|
| + 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",
|
| + ]
|
| + }
|
| +
|
| + if (is_clang) {
|
| + cflags += [
|
| + # TODO(hans): Get this cleaned up.
|
| + "-Wno-inconsistent-missing-override",
|
| + ]
|
| + }
|
| +
|
| + cflags += default_warning_flags
|
| + cflags_cc += default_warning_flags_cc
|
| +
|
| + if (is_clang) {
|
| + cflags += [
|
| + # TODO(dalesat): Remove once not broken by third party (ffmpeg).
|
| + # See https://github.com/domokit/mojo/issues/692.
|
| + "-Wno-constant-conversion",
|
| + ]
|
| + }
|
| +}
|
| +
|
| +# rtti ------------------------------------------------------------------------
|
| +#
|
| +# Allows turning Run-Time Type Identification on or off.
|
| +
|
| +config("rtti") {
|
| +}
|
| +config("no_rtti") {
|
| + cflags_cc = [ "-fno-rtti" ]
|
| +}
|
| +
|
| +# 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") {
|
| + if (is_clang) {
|
| + 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") {
|
| +}
|
| +
|
| +# Some code presumes that pointers to structures/objects are compatible
|
| +# regardless of whether what they point to is already known to be valid.
|
| +config("no_incompatible_pointer_warnings") {
|
| + cflags = []
|
| + if (is_clang) {
|
| + cflags += [ "-Wno-incompatible-pointer-types" ]
|
| + }
|
| +}
|
| +
|
| +# 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.
|
| +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) {
|
| + 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") {
|
| + cflags = common_optimize_on_cflags
|
| + ldflags = common_optimize_on_ldflags
|
| + if (is_android || is_ios) {
|
| + cflags += [ "-Os" ] # Favor size over speed.
|
| + } else {
|
| + cflags += [ "-O2" ]
|
| + }
|
| +}
|
| +
|
| +# Turn off optimizations.
|
| +config("no_optimize") {
|
| + 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 if (is_pnacl) {
|
| + # Linking and optimization is the slowest part of building code
|
| + # using the PNaCl toolchain. Optimizing actually makes these passes faster,
|
| + # and results in a smaller building/translation time.
|
| + cflags = common_optimize_on_cflags
|
| + cflags += [ "-Os" ]
|
| + } 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") {
|
| + cflags = common_optimize_on_cflags
|
| + ldflags = common_optimize_on_ldflags
|
| +
|
| + cflags += [ "-O2" ]
|
| +}
|
| +
|
| +# The default optimization applied to all targets. This will be equivalent to
|
| +# either "optimize" or "no_optimize", depending on the build flags.
|
| +config("default_optimization") {
|
| + if (is_nacl_irt) {
|
| + # The NaCl IRT is a special case and always wants its own config.
|
| + # It gets optimized the same way regardless of the type of build.
|
| + configs = [ "//build/config/nacl:irt_optimize" ]
|
| + } else if (is_debug) {
|
| + configs = [ ":no_optimize" ]
|
| + } else {
|
| + configs = [ ":optimize" ]
|
| + }
|
| +}
|
| +
|
| +# Symbols ----------------------------------------------------------------------
|
| +
|
| +config("symbols") {
|
| + cflags = [ "-g2" ]
|
| + if (use_debug_fission) {
|
| + cflags += [ "-gsplit-dwarf" ]
|
| + }
|
| + asmflags = cflags
|
| + ldflags = []
|
| +}
|
| +
|
| +config("minimal_symbols") {
|
| + cflags = [ "-g1" ]
|
| + if (use_debug_fission) {
|
| + cflags += [ "-gsplit-dwarf" ]
|
| + }
|
| + asmflags = cflags
|
| + ldflags = []
|
| +}
|
| +
|
| +config("no_symbols") {
|
| + cflags = [ "-g0" ]
|
| + asmflags = cflags
|
| +}
|
| +
|
| +# Default symbols.
|
| +config("default_symbols") {
|
| + if (symbol_level == 0) {
|
| + configs = [ ":no_symbols" ]
|
| + } else if (symbol_level == 1) {
|
| + configs = [ ":minimal_symbols" ]
|
| + } else if (symbol_level == 2) {
|
| + configs = [ ":symbols" ]
|
| + } else {
|
| + assert(false)
|
| + }
|
| +}
|
|
|
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