117 строки
4.1 KiB
Plaintext
117 строки
4.1 KiB
Plaintext
# Copyright 2014 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/c++/c++.gni")
|
|
import("//build/config/compiler/compiler.gni")
|
|
import("//build/config/sanitizers/sanitizers.gni")
|
|
import("//build/config/sysroot.gni")
|
|
import("//build/toolchain/toolchain.gni")
|
|
|
|
declare_args() {
|
|
# When non empty, overrides the target rpath value. This allows a user to
|
|
# make a Chromium build where binaries and shared libraries are meant to be
|
|
# installed into separate directories, like /usr/bin/chromium and
|
|
# /usr/lib/chromium for instance. It is useful when a build system that
|
|
# generates a whole target root filesystem (like Yocto) is used on top of gn,
|
|
# especially when cross-compiling.
|
|
# Note: this gn arg is similar to gyp target_rpath generator flag.
|
|
gcc_target_rpath = ""
|
|
ldso_path = ""
|
|
}
|
|
|
|
# This config causes functions not to be automatically exported from shared
|
|
# libraries. By default, all symbols are exported but this means there are
|
|
# lots of exports that slow everything down. In general we explicitly mark
|
|
# which functions we want to export from components.
|
|
#
|
|
# Some third_party code assumes all functions are exported so this is separated
|
|
# into its own config so such libraries can remove this config to make symbols
|
|
# public again.
|
|
#
|
|
# See http://gcc.gnu.org/wiki/Visibility
|
|
config("symbol_visibility_hidden") {
|
|
cflags = [ "-fvisibility=hidden" ]
|
|
|
|
# Visibility attribute is not supported on AIX.
|
|
if (current_os != "aix") {
|
|
cflags_cc = [ "-fvisibility-inlines-hidden" ]
|
|
cflags_objcc = cflags_cc
|
|
}
|
|
}
|
|
|
|
# This config is usually set when :symbol_visibility_hidden is removed.
|
|
# It's often a good idea to set visibility explicitly, as there're flags
|
|
# which would error out otherwise (e.g. -fsanitize=cfi-unrelated-cast)
|
|
config("symbol_visibility_default") {
|
|
cflags = [ "-fvisibility=default" ]
|
|
}
|
|
|
|
# The rpath is the dynamic library search path. Setting this config on a link
|
|
# step will put the directory where the build generates shared libraries into
|
|
# the rpath.
|
|
#
|
|
# This is required for component builds since the build generates many shared
|
|
# libraries in the build directory that we expect to be automatically loaded.
|
|
# It will be automatically applied in this case by :executable_config.
|
|
#
|
|
# In non-component builds, certain test binaries may expect to load dynamic
|
|
# libraries from the current directory. As long as these aren't distributed,
|
|
# this is OK. For these cases use something like this:
|
|
#
|
|
# if ((is_linux || is_chromeos) && !is_component_build) {
|
|
# configs += [ "//build/config/gcc:rpath_for_built_shared_libraries" ]
|
|
# }
|
|
config("rpath_for_built_shared_libraries") {
|
|
if (!is_android) {
|
|
# Note: Android doesn't support rpath.
|
|
if (current_toolchain != default_toolchain || gcc_target_rpath == "") {
|
|
ldflags = [
|
|
# Want to pass "\$". GN will re-escape as required for ninja.
|
|
"-Wl,-rpath=\$ORIGIN",
|
|
]
|
|
} else {
|
|
ldflags = [ "-Wl,-rpath=${gcc_target_rpath}" ]
|
|
}
|
|
if (current_toolchain == default_toolchain && ldso_path != "") {
|
|
ldflags += [ "-Wl,--dynamic-linker=${ldso_path}" ]
|
|
}
|
|
}
|
|
}
|
|
|
|
if (is_component_build && !is_android) {
|
|
# See the rpath_for... config above for why this is necessary for component
|
|
# builds.
|
|
executable_and_shared_library_configs_ =
|
|
[ ":rpath_for_built_shared_libraries" ]
|
|
} else {
|
|
executable_and_shared_library_configs_ = []
|
|
}
|
|
|
|
# Settings for executables.
|
|
config("executable_config") {
|
|
configs = executable_and_shared_library_configs_
|
|
ldflags = [ "-pie" ]
|
|
if (is_android) {
|
|
ldflags += [
|
|
"-Bdynamic",
|
|
"-Wl,-z,nocopyreloc",
|
|
]
|
|
}
|
|
|
|
if (!is_android && current_os != "aix") {
|
|
ldflags += [
|
|
# TODO(GYP): Do we need a check on the binutils version here?
|
|
#
|
|
# Newer binutils don't set DT_RPATH unless you disable "new" dtags
|
|
# and the new DT_RUNPATH doesn't work without --no-as-needed flag.
|
|
"-Wl,--disable-new-dtags",
|
|
]
|
|
}
|
|
}
|
|
|
|
# Settings for shared libraries.
|
|
config("shared_library_config") {
|
|
configs = executable_and_shared_library_configs_
|
|
}
|