Update BUILD.gn
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Alexander David Frick
GitHub
parent
7d4bab0d66
commit
323958cd47
1 changed files with 61 additions and 25 deletions
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@ -106,7 +106,8 @@ declare_args() {
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chromeos_afdo_platform = "atom"
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# Emit debug information for profiling wile building with clang.
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clang_emit_debug_info_for_profiling = false
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# Only enable this for ChromeOS official builds for AFDO.
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clang_emit_debug_info_for_profiling = is_chromeos_device && is_official_build
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# Turn this on to have the compiler output extra timing information.
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compiler_timing = false
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@ -163,6 +164,10 @@ declare_args() {
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# Enable -H, which prints the include tree during compilation.
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# For use by tools/clang/scripts/analyze_includes.py
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show_includes = false
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# If true, linker crashes will be rerun with `--reproduce` which causes
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# a reproducer file to be saved.
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save_reproducers_on_lld_crash = false
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}
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declare_args() {
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@ -526,6 +531,12 @@ config("compiler") {
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if (is_clang && !is_nacl && current_os != "zos") {
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cflags += [ "-fcrash-diagnostics-dir=" + clang_diagnostic_dir ]
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if (save_reproducers_on_lld_crash && use_lld) {
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ldflags += [
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"-fcrash-diagnostics=all",
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"-fcrash-diagnostics-dir=" + clang_diagnostic_dir,
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]
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}
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# TODO(hans): Remove this once Clang generates better optimized debug info
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# by default. https://crbug.com/765793
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@ -597,21 +608,25 @@ config("compiler") {
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if (is_clang) {
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cflags_cc += [ "-fno-trigraphs" ]
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}
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} else if (is_linux) {
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# TODO(crbug.com/1284275): Switch to C++20 on all platforms.
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if (is_clang) {
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cflags_cc += [ "-std=${standard_prefix}++20" ]
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} else if (is_clang) {
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if (is_chromeos_device) {
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# TODO(crbug.com/1392471): Support C++20 in CrOS toolchain.
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cflags_cc += [ "-std=${standard_prefix}++17" ]
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} else {
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# The gcc bots are currently using GCC 9, which is not new enough to
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# support "c++20"/"gnu++20".
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cflags_cc += [ "-std=${standard_prefix}++2a" ]
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cflags_cc += [ "-std=${standard_prefix}++20" ]
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}
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} else {
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cflags_cc += [ "-std=${standard_prefix}++17" ]
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# The gcc bots are currently using GCC 9, which is not new enough to
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# support "c++20"/"gnu++20".
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cflags_cc += [ "-std=${standard_prefix}++2a" ]
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}
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} else if (is_win) {
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cflags_c += [ "/std:c11" ]
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cflags_cc += [ "/std:c++17" ]
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if (!is_clang && defined(msvc_use_cxx17) && msvc_use_cxx17) {
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cflags_cc += [ "/std:c++17" ]
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} else {
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cflags_cc += [ "/std:c++20" ]
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}
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} else if (!is_nacl) {
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# TODO(mcgrathr) - the NaCl GCC toolchain doesn't support either
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# gnu11/gnu++11 or c11/c++11; we technically don't need this toolchain any
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@ -619,11 +634,13 @@ config("compiler") {
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# turned off we need the !is_nacl clause and the (is_nacl && is_clang)
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# clause, above.
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cflags_c += [ "-std=c11" ]
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if (is_apple) {
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# TODO(crbug.com/1284275): Switch to C++20 on all platforms.
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cflags_cc += [ "-std=c++20" ]
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} else {
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if (is_fuchsia) {
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# TODO(crbug.com/fuchsia/108751): The FIDL compiler generates code that
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# will not compile in C++20 mode. Switch to C++20 when this is resolved.
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cflags_cc += [ "-std=c++17" ]
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} else {
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cflags_cc += [ "-std=c++20" ]
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}
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}
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@ -682,10 +699,14 @@ config("compiler") {
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# of "all" which means number of hardware threads) is faster.
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ldflags += [ "-Wl,--thinlto-jobs=all" ]
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if (is_apple) {
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_object_path_suffix = ""
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if (is_ios) {
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_object_path_suffix = ",persist"
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}
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ldflags += [
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"-Wl,-cache_path_lto," +
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rebase_path("$root_out_dir/thinlto-cache", root_build_dir),
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"-Wcrl,object_path_lto",
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"-Wcrl,object_path_lto" + _object_path_suffix,
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]
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} else {
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ldflags +=
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@ -756,7 +777,7 @@ config("compiler") {
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ldflags += [ "-Wl,--no-rosegment" ]
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}
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# TODO(crbug.com/1374347): Cleanup undefined symbol errors caught by
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# TODO(crbug.com/1374347): Cleanup undefined symbol errors caught by
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# --no-undefined-version.
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if (use_lld && !is_win && !is_mac && !is_ios) {
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ldflags += [ "-Wl,--undefined-version" ]
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@ -798,6 +819,17 @@ config("compiler") {
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cflags += [ "-fcomplete-member-pointers" ]
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}
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# Use DWARF simple template names, with the following exceptions:
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#
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# * Windows is not supported as it doesn't use DWARF.
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# * Apple platforms (e.g. MacOS, iPhone, iPad) aren't supported because xcode
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# lldb doesn't have the needed changes yet.
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# * Fuchsia isn't supported as zxdb doesn't support simple template names yet.
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# TODO(crbug.com/1379070): Remove if the upstream default ever changes.
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if (is_clang && !is_nacl && !is_win && !is_apple && !is_fuchsia) {
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cflags_cc += [ "-gsimple-template-names" ]
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}
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# MLGO specific flags. These flags enable an ML-based inliner trained on
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# Chrome on Android (arm32) with ThinLTO enabled, optimizing for size.
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# The "release" ML model is embedded into clang as part of its build.
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@ -916,7 +948,7 @@ config("thinlto_optimize_max") {
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# tweak code generation for a particular CPU do not belong here!
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# See "compiler_codegen", below.
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config("compiler_cpu_abi") {
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cflags = []
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cflags = [ "-O3", ]
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ldflags = []
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defines = []
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@ -943,6 +975,11 @@ config("compiler_cpu_abi") {
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"-msse3",
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]
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}
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} else if (target_cpu == "arm64") {
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if (!is_android && !is_nacl) {
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cflags += [ "-O3", "-Wno-unused-command-line-argument", ]
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ldflags += [ "-Wl,-O3", "-Wno-unused-command-line-argument", ]
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}
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} else if (current_cpu == "arm") {
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if (is_clang && !is_android && !is_nacl &&
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!(is_chromeos_lacros && is_chromeos_device)) {
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@ -965,8 +1002,7 @@ config("compiler_cpu_abi") {
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ldflags += [ "--target=aarch64-linux-gnu", "-Wl,-O3", "-Wno-unused-command-line-argument", ]
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}
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if (is_android) {
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# Outline atomics crash on Exynos 9810. http://crbug.com/1272795
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cflags += [ "-mno-outline-atomics", "-O3", ]
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cflags += [ "-O3", ]
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ldflags += [ "-Wl,-O3", ]
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}
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} else if (current_cpu == "mipsel" && !is_nacl) {
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@ -2008,11 +2044,12 @@ if (is_win) {
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if (is_official_build) {
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common_optimize_on_ldflags += [ "/OPT:REF" ] # Remove unreferenced data.
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# TODO(thakis): Add LTO/PGO clang flags eventually, https://crbug.com/598772
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common_optimize_on_cflags += []
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}
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} else {
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common_optimize_on_cflags = []
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common_optimize_on_ldflags = []
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common_optimize_on_cflags += [
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"-O3",
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]
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@ -2382,7 +2419,8 @@ config("symbols") {
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cflags += [ "-fno-standalone-debug" ]
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}
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if (!is_nacl) {
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# On aix -gdwarf causes linker failures due to thread_local variables.
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if (!is_nacl && current_os != "aix") {
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if (use_dwarf5) {
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cflags += [ "-gdwarf-5" ]
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} else if (!is_apple) {
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@ -2410,9 +2448,6 @@ config("symbols") {
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# It is skipped in tsan and asan because enabling it causes some
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# formatting changes in the output which would require fixing bunches
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# of expectation regexps.
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#
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# It is skipped when generating bitcode is enabled as -gdwars-aranges
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# is incompatible with -fembed-bitcode/-fembed-bitcode-marker.
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cflags += [ "-gdwarf-aranges" ]
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}
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@ -2515,7 +2550,8 @@ config("minimal_symbols") {
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# at least 10.11.
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# TODO(thakis): Remove this once mac_deployment_target is 10.11.
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cflags += [ "-gdwarf-4" ]
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} else if (!use_dwarf5 && !is_nacl) {
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} else if (!use_dwarf5 && !is_nacl && current_os != "aix") {
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# On aix -gdwarf causes linker failures due to thread_local variables.
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# Recent clang versions default to DWARF5 on Linux, and Android is about
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# to switch. TODO: Adopt that in controlled way.
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cflags += [ "-gdwarf-4" ]
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