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