Wyatt Hepler | f6f74f4 | 2021-04-13 19:26:20 -0700 | [diff] [blame] | 1 | # Copyright 2021 The Pigweed Authors |
| 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 | |
| 15 | import("//build_overrides/pigweed.gni") |
| 16 | |
| 17 | # Creates a toolchain that provides no C/C++ compiler. It can be used for |
| 18 | # non-C/C++ languages or actions that should only happen once across all builds. |
| 19 | # The toolchain cannot compile C/C++, and trying to use it to is an error. |
| 20 | # |
| 21 | # Args: |
| 22 | # command: Run this command if this toolchain is used to build C/C++ code. |
| 23 | # |
| 24 | template("pw_non_c_toolchain") { |
| 25 | # Import the universal stamp & copy tools. |
| 26 | import("$dir_pw_toolchain/universal_tools.gni") |
| 27 | _label = get_label_info(":$target_name", "label_no_toolchain") |
| 28 | |
| 29 | # If the user tries to build a target with this toolchain, run a script that |
| 30 | # prints out an error. |
| 31 | _message = |
| 32 | "Attempted to use the $target_name toolchain to compile {{source}}.\n" + |
| 33 | "This toolchain cannot be used to compile C/C++ source code.\n\n" + |
| 34 | "This toolchain was either explicitly specified in a deps list with\n" + |
| 35 | "GN's :target($_label) syntax or was set as the\n" + |
| 36 | "default toolchain in the BUILDCONFIG.gn file.\n\n" + |
| 37 | "Ensure that no C/C++ GN targets are referred to with this toolchain,\n" + |
| 38 | "even transitively.\n\n" + |
| 39 | "See https://pigweed.dev/pw_toolchain for more information." |
| 40 | |
| 41 | _command = string_join(" ", |
| 42 | [ |
| 43 | "python", |
Michael Spang | c8b9390 | 2021-05-30 15:53:56 -0400 | [diff] [blame] | 44 | rebase_path("$dir_pw_build/py/pw_build/error.py", |
| 45 | root_build_dir), |
Wyatt Hepler | f6f74f4 | 2021-04-13 19:26:20 -0700 | [diff] [blame] | 46 | "--message \"$_message\"", |
| 47 | "--target", |
| 48 | _label, |
| 49 | "--root", |
Michael Spang | c8b9390 | 2021-05-30 15:53:56 -0400 | [diff] [blame] | 50 | rebase_path("//", root_build_dir), |
Wyatt Hepler | f6f74f4 | 2021-04-13 19:26:20 -0700 | [diff] [blame] | 51 | "--out", |
Michael Spang | c8b9390 | 2021-05-30 15:53:56 -0400 | [diff] [blame] | 52 | ".", |
Wyatt Hepler | f6f74f4 | 2021-04-13 19:26:20 -0700 | [diff] [blame] | 53 | ]) |
| 54 | |
| 55 | if (defined(invoker.command)) { |
| 56 | _command = invoker.command |
| 57 | } else { |
| 58 | not_needed([ "invoker" ]) |
| 59 | } |
| 60 | |
| 61 | toolchain(target_name) { |
| 62 | tool("stamp") { |
| 63 | forward_variables_from(pw_universal_stamp, "*") |
| 64 | } |
| 65 | |
| 66 | tool("copy") { |
| 67 | forward_variables_from(pw_universal_copy, "*") |
| 68 | } |
| 69 | |
| 70 | tool("asm") { |
| 71 | command = _command |
| 72 | outputs = |
| 73 | [ "{{source_out_dir}}/{{target_output_name}}.{{source_file_part}}.o" ] |
| 74 | } |
| 75 | |
| 76 | tool("cc") { |
| 77 | command = _command |
| 78 | outputs = |
| 79 | [ "{{source_out_dir}}/{{target_output_name}}.{{source_file_part}}.o" ] |
| 80 | } |
| 81 | |
| 82 | tool("cxx") { |
| 83 | command = _command |
| 84 | outputs = |
| 85 | [ "{{source_out_dir}}/{{target_output_name}}.{{source_file_part}}.o" ] |
| 86 | } |
| 87 | |
| 88 | # Can't use {{source}} for the linker, so replace it if it's in the command. |
| 89 | _command_no_source = string_replace(_command, "{{source}}", "C/C++ sources") |
| 90 | |
| 91 | tool("link") { |
| 92 | command = _command_no_source |
| 93 | outputs = [ "{{output_dir}}/{{target_output_name}}{{output_extension}}" ] |
| 94 | } |
| 95 | |
| 96 | tool("alink") { |
| 97 | command = _command_no_source |
| 98 | outputs = [ "{{output_dir}}/{{target_output_name}}{{output_extension}}" ] |
| 99 | } |
| 100 | |
| 101 | tool("solink") { |
| 102 | command = _command_no_source |
| 103 | outputs = [ "{{output_dir}}/{{target_output_name}}{{output_extension}}" ] |
| 104 | } |
| 105 | } |
| 106 | } |