| # 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. |
| |
| # Toolchain-related configuration that may be needed outside the context of the |
| # toolchain() rules themselves. |
| |
| import("//build_overrides/build.gni") |
| import("//build/config/chrome_build.gni") |
| |
| declare_args() { |
| # If this is set to true, or if LLVM_FORCE_HEAD_REVISION is set to 1 |
| # in the environment, we use the revision in the llvm repo to determine |
| # the CLANG_REVISION to use, instead of the version hard-coded into |
| # //tools/clang/scripts/update.py. This should only be used in |
| # conjunction with setting LLVM_FORCE_HEAD_REVISION in the |
| # environment when `gclient runhooks` is run as well. |
| llvm_force_head_revision = false |
| |
| # Compile with Xcode version of clang instead of hermetic version shipped |
| # with the build. Used on iOS to ship official builds (as they are built |
| # with the version of clang shipped with Xcode). |
| use_xcode_clang = is_ios && is_official_build |
| |
| # Used for binary size analysis. |
| # Currently disabled on LLD because of a bug (fixed upstream). |
| # See https://crbug.com/716209. |
| generate_linker_map = is_android && is_official_build |
| |
| # Use absolute file paths in the compiler diagnostics and __FILE__ macro |
| # if needed. |
| msvc_use_absolute_paths = false |
| } |
| |
| if (generate_linker_map) { |
| assert( |
| is_official_build, |
| "Linker map files should only be generated when is_official_build = true") |
| assert(current_os == "android" || target_os == "linux", |
| "Linker map files should only be generated for Android and Linux") |
| } |
| |
| # The path to the hermetic install of Xcode. Only relevant when |
| # use_system_xcode = false. |
| hermetic_xcode_path = |
| rebase_path("//build/${target_os}_files/Xcode.app", "", root_build_dir) |
| |
| declare_args() { |
| if (is_clang) { |
| # Clang compiler version. Clang files are placed at version-dependent paths. |
| clang_version = "7.0.0" |
| } |
| } |
| |
| # Check target_os here instead of is_ios as this file is loaded for secondary |
| # toolchain (host toolchain in particular) but the argument is the same for |
| # all toolchains. |
| assert(!use_xcode_clang || target_os == "ios", |
| "Using Xcode's clang is only supported in iOS builds") |
| |
| # Subdirectory within root_out_dir for shared library files. |
| # TODO(agrieve): GYP sets this to "lib" for Linux & Android, but this won't work |
| # in GN until support for loadable_module() is added. |
| # See: https://codereview.chromium.org/1236503002/ |
| shlib_subdir = "." |
| |
| # Root out dir for shared library files. |
| root_shlib_dir = root_out_dir |
| if (shlib_subdir != ".") { |
| root_shlib_dir += "/$shlib_subdir" |
| } |
| |
| # Extension for shared library files (including leading dot). |
| if (is_mac || is_ios) { |
| shlib_extension = ".dylib" |
| } else if (is_android && is_component_build) { |
| # By appending .cr, we prevent name collisions with libraries already |
| # loaded by the Android zygote. |
| shlib_extension = ".cr.so" |
| } else if (is_posix || is_fuchsia) { |
| shlib_extension = ".so" |
| } else if (is_win) { |
| shlib_extension = ".dll" |
| } else { |
| assert(false, "Platform not supported") |
| } |
| |
| # Prefix for shared library files. |
| if (is_posix || is_fuchsia) { |
| shlib_prefix = "lib" |
| } else { |
| shlib_prefix = "" |
| } |
| |
| # While other "tool"s in a toolchain are specific to the target of that |
| # toolchain, the "stamp" and "copy" tools are really generic to the host; |
| # but each toolchain must define them separately. GN doesn't allow a |
| # template instantiation inside a toolchain definition, so some boilerplate |
| # has to be repeated in each toolchain to define these two tools. These |
| # four variables reduce the duplication in that boilerplate. |
| stamp_description = "STAMP {{output}}" |
| copy_description = "COPY {{source}} {{output}}" |
| if (host_os == "win") { |
| _tool_wrapper_path = |
| rebase_path("//build/toolchain/win/tool_wrapper.py", root_build_dir) |
| |
| stamp_command = "cmd /c type nul > \"{{output}}\"" |
| copy_command = |
| "$python_path $_tool_wrapper_path recursive-mirror {{source}} {{output}}" |
| } else { |
| stamp_command = "touch {{output}}" |
| copy_command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})" |
| } |