blob: 4ab0270f902a7b8dfd9b3114b0281e787d70265e [file] [log] [blame]
# 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.
declare_args() {
# Enable Link Time Optimization in optimized builds (output programs run
# faster, but linking is up to 5-20x slower).
#
# TODO(pcc): Remove this flag if/when LTO is enabled in official builds.
allow_posix_link_time_opt = false
# Set to true to use lld, the LLVM linker. This flag may be used on Windows
# with the shipped LLVM toolchain, or on Linux with a self-built top-of-tree
# LLVM toolchain (see llvm_force_head_revision in
# build/config/compiler/BUILD.gn).
use_lld = false
if (is_clang) {
# Clang compiler version. Clang files are placed at version-dependent paths.
clang_version = "3.9.0"
}
}
# 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 += "/$shlib_subdir"
}
# Extension for shared library files (including leading dot).
if (is_mac || is_ios) {
shlib_extension = ".dylib"
} else if (is_android && is_component_build) {
# By appending .cr, we prevent name collisions with libraries already
# loaded by the Android zygote.
shlib_extension = ".cr.so"
} else if (is_posix) {
shlib_extension = ".so"
} else if (is_win) {
shlib_extension = ".dll"
} else {
assert(false, "Platform not supported")
}
# Prefix for shared library files.
if (is_posix) {
shlib_prefix = "lib"
} else {
shlib_prefix = ""
}
# While other "tool"s in a toolchain are specific to the target of that
# toolchain, the "stamp" and "copy" tools are really generic to the host;
# but each toolchain must define them separately. GN doesn't allow a
# template instantiation inside a toolchain definition, so some boilerplate
# has to be repeated in each toolchain to define these two tools. These
# four variables reduce the duplication in that boilerplate.
stamp_description = "STAMP {{output}}"
copy_description = "COPY {{source}} {{output}}"
if (host_os == "win") {
stamp_command = "$python_path gyp-win-tool stamp {{output}}"
copy_command =
"$python_path gyp-win-tool 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}})"
}