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