blob: e95004385eb30fc7a53c7f53f79e33c92d17aeea [file] [log] [blame]
# Copyright 2017 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/sanitizers/sanitizers.gni")
declare_args() {
# Use libc++ (buildtools/third_party/libc++ and
# buildtools/third_party/libc++abi) instead of stdlibc++ as standard
# library.
# Don't check in changes that set this to false for more platforms; doing so
# is not supported.
use_custom_libcxx =
is_msan || is_fuchsia || is_android ||
(is_linux &&
(!is_chromeos || default_toolchain != "//build/toolchain/cros:target"))
# Use libc++ instead of stdlibc++ when using the host_cpu toolchain, even if
# use_custom_libcxx is false. This is useful for cross-compiles where a custom
# toolchain for the target_cpu has been set as the default toolchain, but
# use_custom_libcxx should still be true when building for the host. The
# expected usage is to set use_custom_libcxx=false and
# use_custom_libcxx_for_host=true in the passed in buildargs.
use_custom_libcxx_for_host = false
# ASan, MSan and TSan builds need to override operator new, operator delete,
# and some exception handling symbols, so libc++ must be a shared library to
# prevent duplicate symbol errors when linking.
# Additionally, -fsanitize=vptr requires libc++ to be a shared library
# because the ubsan runtime library that implements -fsanitize=vptr calls
# dynamic_cast with the ABI type info classes, which won't return the right
# answer if each DSO has its own copy of the ABI classes.
libcpp_is_static = !is_component_build && !is_asan && !is_msan && !is_tsan &&
!is_ubsan && !is_ubsan_security && !is_ubsan_vptr
}
use_custom_libcxx =
use_custom_libcxx || (use_custom_libcxx_for_host && current_cpu == host_cpu)
use_custom_libcxx = use_custom_libcxx && !is_nacl
libcxx_prefix = "//buildtools/third_party/libc++/trunk"
libcxxabi_prefix = "//buildtools/third_party/libc++abi/trunk"