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119 lines
4.3 KiB
Plaintext
119 lines
4.3 KiB
Plaintext
# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# Toolchain-related configuration that may be needed outside the context of the
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# toolchain() rules themselves.
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import("//build_overrides/build.gni")
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import("//build/config/chrome_build.gni")
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declare_args() {
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# If this is set to true, or if LLVM_FORCE_HEAD_REVISION is set to 1
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# in the environment, we use the revision in the llvm repo to determine
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# the CLANG_REVISION to use, instead of the version hard-coded into
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# //tools/clang/scripts/update.py. This should only be used in
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# conjunction with setting LLVM_FORCE_HEAD_REVISION in the
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# environment when `gclient runhooks` is run as well.
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llvm_force_head_revision = false
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# Compile with Xcode version of clang instead of hermetic version shipped
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# with the build. Used on iOS to ship official builds (as they are built
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# with the version of clang shipped with Xcode).
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use_xcode_clang = is_ios && is_official_build
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# Used for binary size analysis.
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# Currently disabled on LLD because of a bug (fixed upstream).
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# See https://crbug.com/716209.
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generate_linker_map = is_android && is_official_build
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# Use absolute file paths in the compiler diagnostics and __FILE__ macro
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# if needed.
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msvc_use_absolute_paths = false
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}
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if (generate_linker_map) {
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assert(
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is_official_build,
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"Linker map files should only be generated when is_official_build = true")
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assert(current_os == "android" || target_os == "linux",
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"Linker map files should only be generated for Android and Linux")
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}
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# The path to the hermetic install of Xcode. Only relevant when
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# use_system_xcode = false.
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hermetic_xcode_path =
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rebase_path("//build/${target_os}_files/Xcode.app", "", root_build_dir)
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declare_args() {
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if (is_clang) {
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# Clang compiler version. Clang files are placed at version-dependent paths.
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if (llvm_force_head_revision) {
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clang_version = "8.0.0"
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} else {
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# TODO(hans): Trunk version was updated; remove after the next roll.
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clang_version = "7.0.0"
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}
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}
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}
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# Check target_os here instead of is_ios as this file is loaded for secondary
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# toolchain (host toolchain in particular) but the argument is the same for
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# all toolchains.
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assert(!use_xcode_clang || target_os == "ios",
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"Using Xcode's clang is only supported in iOS builds")
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# Subdirectory within root_out_dir for shared library files.
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# TODO(agrieve): GYP sets this to "lib" for Linux & Android, but this won't work
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# in GN until support for loadable_module() is added.
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# See: https://codereview.chromium.org/1236503002/
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shlib_subdir = "."
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# Root out dir for shared library files.
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root_shlib_dir = root_out_dir
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if (shlib_subdir != ".") {
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root_shlib_dir += "/$shlib_subdir"
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}
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# Extension for shared library files (including leading dot).
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if (is_mac || is_ios) {
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shlib_extension = ".dylib"
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} else if (is_android && is_component_build) {
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# By appending .cr, we prevent name collisions with libraries already
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# loaded by the Android zygote.
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shlib_extension = ".cr.so"
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} else if (is_posix || is_fuchsia) {
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shlib_extension = ".so"
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} else if (is_win) {
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shlib_extension = ".dll"
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} else {
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assert(false, "Platform not supported")
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}
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# Prefix for shared library files.
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if (is_posix || is_fuchsia) {
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shlib_prefix = "lib"
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} else {
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shlib_prefix = ""
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}
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# While other "tool"s in a toolchain are specific to the target of that
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# toolchain, the "stamp" and "copy" tools are really generic to the host;
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# but each toolchain must define them separately. GN doesn't allow a
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# template instantiation inside a toolchain definition, so some boilerplate
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# has to be repeated in each toolchain to define these two tools. These
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# four variables reduce the duplication in that boilerplate.
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stamp_description = "STAMP {{output}}"
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copy_description = "COPY {{source}} {{output}}"
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if (host_os == "win") {
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_tool_wrapper_path =
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rebase_path("//build/toolchain/win/tool_wrapper.py", root_build_dir)
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stamp_command = "cmd /c type nul > \"{{output}}\""
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copy_command =
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"$python_path $_tool_wrapper_path recursive-mirror {{source}} {{output}}"
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} else {
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stamp_command = "touch {{output}}"
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copy_command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
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}
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