77 строки
2.7 KiB
Plaintext
77 строки
2.7 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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declare_args() {
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# Enable Link Time Optimization in optimized builds (output programs run
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# faster, but linking is up to 5-20x slower).
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#
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# TODO(pcc): Remove this flag if/when LTO is enabled in official builds.
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allow_posix_link_time_opt = false
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# Set to true to use lld, the LLVM linker. This flag may be used on Windows
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# with the shipped LLVM toolchain, or on Linux with a self-built top-of-tree
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# LLVM toolchain (see llvm_force_head_revision in
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# build/config/compiler/BUILD.gn).
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use_lld = false
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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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clang_version = "3.9.0"
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}
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}
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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) {
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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) {
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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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stamp_command = "$python_path gyp-win-tool stamp {{output}}"
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copy_command =
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"$python_path gyp-win-tool 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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