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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
15declare_args() {
16  is_debug = true
17  is_clang = true
18  is_system_compiler = false
19  is_lto = false
20
21  # This is defined here because it's needed below for determining the value of
22  # |is_cross_compiling|.
23  target_triplet = ""
24}
25
26# Platform detection
27if (target_os == "") {
28  target_os = host_os
29}
30if (current_os == "") {
31  current_os = target_os
32}
33
34is_android = current_os == "android"
35is_chromeos = current_os == "chromeos"
36is_linux = current_os == "linux"
37is_linux_host = host_os == "linux"
38is_mac = current_os == "mac"
39is_mac_host = host_os == "mac"
40is_win = current_os == "win"
41is_win_host = host_os == "win"
42
43# Building with Windows/Fuchsia/nacl is currently only supported in the Chromium
44# tree so always set this to false.
45is_fuchsia = false
46is_nacl = false
47
48if (target_cpu == "") {
49  target_cpu = host_cpu
50  if (is_android) {
51    target_cpu = "arm"
52  }
53}
54if (current_cpu == "") {
55  current_cpu = target_cpu
56}
57
58is_cross_compiling =
59    target_cpu != host_cpu || target_os != host_os || target_triplet != ""
60
61default_configs = [
62  "//gn/standalone:debug_symbols",
63  "//gn/standalone:default",
64  "//gn/standalone:c++11",
65  "//gn/standalone:extra_warnings",
66  "//gn/standalone:no_exceptions",
67  "//gn/standalone:no_rtti",
68  "//gn/standalone:visibility_hidden",
69  "//gn/standalone/libc++:config",
70  "//gn/standalone/sanitizers:sanitizers_cflags",
71]
72
73if (is_win) {
74  default_configs += [ "//gn/standalone:win32_lean_and_mean" ]
75}
76
77if (!is_debug) {
78  default_configs -= [ "//gn/standalone:debug_symbols" ]
79  default_configs += [ "//gn/standalone:release" ]
80}
81
82set_defaults("source_set") {
83  configs = default_configs
84}
85
86set_defaults("static_library") {
87  configs = default_configs
88}
89
90# Realistically the only shared_library that we build right now is libc++.so
91# when use_custom_libcxx=true (on Linux). Hence don't add a dependency on
92# libc++ itself on these targets.
93set_defaults("shared_library") {
94  configs = default_configs
95  configs += [ "//gn/standalone:shared_library" ]
96
97  # note: the following is not a nested config to be removable.
98  configs += [ "//gn/standalone:android_liblog" ]
99}
100
101set_defaults("executable") {
102  configs = default_configs
103  configs += [ "//gn/standalone:executable" ]
104
105  # note: the following is not a nested config to be removable.
106  configs += [ "//gn/standalone:android_liblog" ]
107}
108
109if (is_win) {
110  _default_toolchain = "//gn/standalone/toolchain:msvc"
111} else {
112  _default_toolchain = "//gn/standalone/toolchain:gcc_like"
113}
114set_default_toolchain(_default_toolchain)
115
116if (is_cross_compiling) {
117  host_toolchain = "//gn/standalone/toolchain:gcc_like_host"
118} else {
119  host_toolchain = _default_toolchain
120}
121