Wyatt Hepler | 2119240 | 2020-01-15 15:40:51 -0800 | [diff] [blame] | 1 | # Copyright 2020 The Pigweed Authors |
Alexei Frolov | 1a82c14 | 2019-10-31 17:37:12 -0700 | [diff] [blame] | 2 | # |
| 3 | # Licensed under the Apache License, Version 2.0 (the "License"); you may not |
| 4 | # use this file except in compliance with the License. You may obtain a copy of |
| 5 | # the License at |
| 6 | # |
| 7 | # https://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, WITHOUT |
| 11 | # WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| 12 | # License for the specific language governing permissions and limitations under |
| 13 | # the License. |
| 14 | |
Armando Montanez | 0ef17a7 | 2020-01-07 13:17:04 -0800 | [diff] [blame] | 15 | # This BUILDCONFIG file tells GN how to build upstream Pigweed. When starting a |
| 16 | # new project, you'll need to copy this file to your project and then modify it |
| 17 | # to fit your needs. Due to the way Pigweed handles file imports, you won't be |
| 18 | # able to simply import this file in your own BUILDCONFIG.gn. |
| 19 | # |
| 20 | # Keep in mind when importing .gni files that `gn format` will try to |
| 21 | # alphabetically sort imports unless they're separated by comments. For this |
| 22 | # file, import order matters (modules.gni MUST be imported first). |
Alexei Frolov | 1a82c14 | 2019-10-31 17:37:12 -0700 | [diff] [blame] | 23 | |
| 24 | declare_args() { |
Armando Montanez | 0ef17a7 | 2020-01-07 13:17:04 -0800 | [diff] [blame] | 25 | # Location of the Pigweed modules directory (defaults to the directory of |
| 26 | # this file). When copying this buildconfig into a new project, this should |
| 27 | # be modified to point to the location of the Pigweed repository. |
| 28 | dir_pigweed = get_path_info(get_path_info("BUILDCONFIG.gn", "abspath"), "dir") |
| 29 | |
Alexei Frolov | e899dcf | 2019-11-13 14:49:14 -0800 | [diff] [blame] | 30 | # Path to the Pigweed variables config file for the build target. |
Alexei Frolov | 02dfcc4 | 2019-11-08 15:51:51 -0800 | [diff] [blame] | 31 | # |
Alexei Frolov | e899dcf | 2019-11-13 14:49:14 -0800 | [diff] [blame] | 32 | # When this is changed, you must run `ninja -t clean` to remove any files from |
| 33 | # the previous target's build before building again. |
| 34 | pw_target_config = "$dir_pigweed/targets/host/host.gni" |
Alexei Frolov | 1a82c14 | 2019-10-31 17:37:12 -0700 | [diff] [blame] | 35 | } |
| 36 | |
Armando Montanez | 0ef17a7 | 2020-01-07 13:17:04 -0800 | [diff] [blame] | 37 | # Import variables that provide paths to modules. Pigweed's GN build requires |
| 38 | # that this file is imported, and it MUST be imported before any other Pigweed |
| 39 | # .gni files (as they depend on the dir_[module] variables). |
| 40 | import("$dir_pigweed/modules.gni") |
| 41 | |
Armando Montanez | 0ef17a7 | 2020-01-07 13:17:04 -0800 | [diff] [blame] | 42 | # Import target configuration. This is what "completes" a Pigweed configuration. |
| 43 | # This file should set a default toolchain, configure pw_executable, select |
| 44 | # backends to build against, and provide target-specific build arguments. |
Alexei Frolov | e899dcf | 2019-11-13 14:49:14 -0800 | [diff] [blame] | 45 | import(pw_target_config) |
| 46 | |
Armando Montanez | 0ef17a7 | 2020-01-07 13:17:04 -0800 | [diff] [blame] | 47 | # Ensure some sort of default toolchain was provided by the target, and then |
| 48 | # set the default toolchain. |
Alexei Frolov | e899dcf | 2019-11-13 14:49:14 -0800 | [diff] [blame] | 49 | assert(pw_target_toolchain != "", |
| 50 | "Build target must provide its own toolchain.") |
Alexei Frolov | 02dfcc4 | 2019-11-08 15:51:51 -0800 | [diff] [blame] | 51 | set_default_toolchain(pw_target_toolchain) |
Wyatt Hepler | 2119240 | 2020-01-15 15:40:51 -0800 | [diff] [blame] | 52 | |
| 53 | # Override the built-in build targets to add default compilation options. |
| 54 | # TODO(pwbug/72): Move this code to a .gni file for easier reuse. |
| 55 | template("_pw_override_target_with_defaults") { |
| 56 | target(invoker._target_type, target_name) { |
| 57 | forward_variables_from(invoker, "*", [ "_target_type" ]) |
| 58 | |
Wyatt Hepler | c542a5d | 2020-01-15 15:43:10 -0800 | [diff] [blame] | 59 | # Add a dependency on pw_polyfill, unless this is pw_polyfill. |
| 60 | if (rebase_path(".") != rebase_path("$dir_pw_polyfill")) { |
| 61 | if (!defined(public_deps)) { |
| 62 | public_deps = [] |
| 63 | } |
| 64 | public_deps += [ "$dir_pw_polyfill:overrides" ] |
| 65 | } |
| 66 | |
Wyatt Hepler | 2119240 | 2020-01-15 15:40:51 -0800 | [diff] [blame] | 67 | if (!defined(configs)) { |
| 68 | configs = [] |
| 69 | } |
| 70 | |
| 71 | # Add default configs to use for all binary build targets. |
Wyatt Hepler | b9db09f | 2020-01-27 17:40:08 -0800 | [diff] [blame] | 72 | configs += [ "$dir_pw_build:default" ] |
Wyatt Hepler | 2119240 | 2020-01-15 15:40:51 -0800 | [diff] [blame] | 73 | } |
| 74 | } |
| 75 | |
| 76 | foreach(_target_type, |
| 77 | [ |
| 78 | "source_set", |
| 79 | "executable", |
| 80 | "shared_library", |
| 81 | "static_library", |
| 82 | ]) { |
| 83 | template(_target_type) { |
| 84 | _pw_override_target_with_defaults(target_name) { |
| 85 | forward_variables_from(invoker, "*") |
| 86 | } |
| 87 | } |
| 88 | } |