1# Copyright (C) 2017 The Android Open Source Project 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import("//gn/standalone/sanitizers/vars.gni") 16 17declare_args() { 18 is_hermetic_clang = is_clang && (is_linux_host || is_win_host) 19 non_hermetic_clang_stdlib = "" 20} 21 22assert(!is_hermetic_clang || is_clang, "is_hermetic_clang requires is_clang") 23 24linux_llvm_objcopy = "" 25if (is_linux_host) { 26 if (is_hermetic_clang) { 27 _hermetic_llvm_dir = 28 rebase_path("//buildtools/linux64/clang", root_build_dir) 29 linux_clang_bin = "$_hermetic_llvm_dir/bin/clang" 30 linux_clangxx_bin = "$_hermetic_llvm_dir/bin/clang++" 31 linux_llvm_objcopy = "$_hermetic_llvm_dir/bin/llvm-objcopy" 32 linux_clang_linker = "lld" 33 } else if (is_clang && !is_system_compiler) { 34 # Guess the path for the system clang. 35 # When is_system_compiler = true users neet to explicitly set cc / target_cc 36 # vars in the GN args." 37 _find_llvm_out = exec_script("linux_find_llvm.py", [], "list lines") 38 _linux_llvm_dir = _find_llvm_out[0] 39 linux_clang_bin = _find_llvm_out[1] 40 linux_clangxx_bin = _find_llvm_out[2] 41 linux_clang_linker = "gold" 42 } 43} else if (is_mac_host && is_clang && !is_system_compiler) { 44 _mac_toolchain_dirs = exec_script("mac_find_llvm.py", [], "list lines") 45 46 # _mac_toolchain_dirs[0] contains the mac toolchain dir. 47 mac_clangrt_dir = _mac_toolchain_dirs[1] 48} else if (is_win_host) { 49 if (is_hermetic_clang) { 50 # Use the toolchain pulled by //tools/install-build-deps. This tracks 51 # chromium's llvm dist. 52 _llvm_win_path = rebase_path("//buildtools/win/clang/bin", root_build_dir) 53 win_clang_bin = "${_llvm_win_path}\clang-cl.exe" 54 win_clangxx_bin = "${_llvm_win_path}\clang-cl.exe" 55 win_clang_linker = "${_llvm_win_path}\lld-link.exe" 56 } else { 57 # Assume clang-cl.exe / lld-link.exe are on the PATH. The user can always 58 # ovveride them by setting cc/cxx/linker GN variables. 59 # See //gn/standalone/toolchain/BUILD.gn. 60 win_clang_bin = "clang-cl.exe" 61 win_clangxx_bin = "clang-cl.exe" 62 win_clang_linker = "lld-link.exe" 63 } 64} 65