| # Copyright 2015 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") |
| import("//build/config/chromecast_build.gni") |
| import("//build/config/compiler/pgo/pgo.gni") |
| import("//build/config/sanitizers/sanitizers.gni") |
| import("//build/toolchain/goma.gni") |
| import("//build/toolchain/toolchain.gni") |
| import("//build_overrides/build.gni") |
| |
| declare_args() { |
| # How many symbols to include in the build. This affects the performance of |
| # the build since the symbols are large and dealing with them is slow. |
| # 2 means regular build with symbols. |
| # 1 means minimal symbols, usually enough for backtraces only. Symbols with |
| # internal linkage (static functions or those in anonymous namespaces) may not |
| # appear when using this level. |
| # 0 means no symbols. |
| # -1 means auto-set according to debug/release and platform. |
| symbol_level = -1 |
| |
| # 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 |
| |
| # 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 |
| # |
| # This is a placeholder value indicating that the code below should set |
| # the default. This is necessary to delay the evaluation of the default |
| # value expression until after its input values such as use_gold have |
| # been set, e.g. by a toolchain_args() block. |
| use_debug_fission = "default" |
| |
| # Tell VS to create a PDB that references information in .obj files rather |
| # than copying it all. This should improve linker performance. mspdbcmf.exe |
| # can be used to convert a fastlink pdb to a normal one. |
| is_win_fastlink = false |
| |
| # Whether or not we should turn on incremental WPO. Only affects the VS |
| # Windows build. |
| use_incremental_wpo = false |
| |
| # Root directory that will store the MSVC link repro. This should only be |
| # used for debugging purposes on the builders where a MSVC linker flakyness |
| # has been observed. The targets for which a link repro should be generated |
| # should add somethink like this to their configuration: |
| # if (linkrepro_root_dir != "") { |
| # ldflags = ["/LINKREPRO:" + linkrepro_root_dir + "/" + target_name] |
| # } |
| # |
| # Note that doing a link repro uses a lot of disk space and slows down the |
| # build, so this shouldn't be enabled on too many targets. |
| # |
| # See crbug.com/669854. |
| linkrepro_root_dir = "" |
| |
| # Whether or not we should use position independent code. |
| use_pic = true |
| } |
| |
| declare_args() { |
| # Whether or not the official builds should be built with full WPO. Enabled by |
| # default for the PGO and the x64 builds. |
| if (chrome_pgo_phase > 0) { |
| full_wpo_on_official = true |
| } else { |
| full_wpo_on_official = false |
| } |
| } |
| |
| declare_args() { |
| # Whether to use the gold linker from binutils instead of lld or bfd. |
| use_gold = !use_lld && !(is_chromecast && is_linux && |
| (current_cpu == "arm" || current_cpu == "mipsel")) && |
| ((is_linux && (current_cpu == "x64" || current_cpu == "x86" || |
| current_cpu == "arm" || current_cpu == "mipsel")) || |
| (is_android && (current_cpu == "x86" || current_cpu == "x64" || |
| current_cpu == "arm" || current_cpu == "arm64"))) |
| } |
| |
| # If it wasn't manually set, set to an appropriate default. |
| assert(symbol_level >= -1 && symbol_level <= 2, "Invalid symbol_level") |
| if (symbol_level == -1) { |
| if (is_android && use_order_profiling) { |
| # With instrumentation enabled, debug info puts libchrome.so over 4gb, which |
| # causes the linker to produce an invalid ELF. http://crbug.com/574476 |
| symbol_level = 0 |
| } else if (is_android && !is_component_build && |
| !(android_64bit_target_cpu && !build_apk_secondary_abi)) { |
| # Reduce symbol level when it will cause invalid elf files to be created |
| # (due to file size). https://crbug.com/648948. |
| symbol_level = 1 |
| } else if (is_win && use_goma && !is_clang) { |
| # goma doesn't support PDB files, so we disable symbols during goma |
| # compilation because otherwise the redundant debug information generated |
| # by visual studio (repeated in every .obj file) makes linker |
| # memory consumption and link times unsustainable (crbug.com/630074). |
| # Clang on windows does not have this issue. |
| # If you use is_win_fastlink = true then you can set symbol_level = 2 when |
| # using goma. |
| symbol_level = 1 |
| } else if ((!is_nacl && !is_linux) || is_debug || is_official_build || |
| is_chromecast) { |
| # Linux builds slower by having symbols as part of the target binary, |
| # whereas Mac and Windows have them separate, so in Release Linux, default |
| # them off, but keep them on for Official builds and Chromecast builds. |
| symbol_level = 2 |
| } else if (using_sanitizer) { |
| # Sanitizers require symbols for filename suppressions to work. |
| symbol_level = 1 |
| } else { |
| symbol_level = 0 |
| } |
| } else if (symbol_level == 2) { |
| if (is_win) { |
| # See crbug.com/630074 |
| assert(is_win_fastlink || !use_goma, |
| "Goma builds that use symbol_level 2 must use is_win_fastlink.") |
| } |
| } |
| |
| # Assert that the configuration isn't going to hit https://crbug.com/648948. |
| assert(ignore_elf32_limitations || !is_android || |
| (android_64bit_target_cpu && !build_apk_secondary_abi) || |
| is_component_build || symbol_level < 2, |
| "Android 32-bit non-component builds cannot have symbol_level=2 " + |
| "due to 4GiB file size limit, see https://crbug.com/648948. " + |
| "If you really want to try this out, " + |
| "set ignore_elf32_limitations=true.") |