1# Copyright 2024 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. 14include_guard(GLOBAL) 15 16include($ENV{PW_ROOT}/pw_build/pigweed.cmake) 17 18function(emboss_cc_library NAME) 19 pw_parse_arguments( 20 NUM_POSITIONAL_ARGS 21 1 22 ONE_VALUE_ARGS 23 SOURCES 24 MULTI_VALUE_ARGS 25 IMPORT_DIRS 26 DEPS 27 REQUIRED_ARGS 28 SOURCES) 29 30 # Include default import dirs with the user specified values. 31 list(APPEND arg_IMPORT_DIRS $ENV{PW_ROOT} ${CMAKE_CURRENT_SOURCE_DIR}) 32 33 set(out_dir "${CMAKE_CURRENT_BINARY_DIR}/${NAME}") 34 35 # embossc will output and emb to: <output_path>/<input_path>.emb.h 36 pw_rebase_paths(outputs ${out_dir} "${CMAKE_CURRENT_SOURCE_DIR}" 37 "${arg_SOURCES}" ".emb.h") 38 39 # Set the include path to export to the output file's directory. 40 get_filename_component(output_include_path "${outputs}" DIRECTORY) 41 42 # Make the import dir paths absolute 43 pw_rebase_paths(abs_import_dirs "${CMAKE_CURRENT_SOURCE_DIR}" 44 "${CMAKE_CURRENT_SOURCE_DIR}" "${arg_IMPORT_DIRS}" "") 45 46 # Expose a list of our sources so that other generate steps can depend on 47 # them. 48 pw_rebase_paths(abs_sources "${CMAKE_CURRENT_SOURCE_DIR}" 49 "${CMAKE_CURRENT_SOURCE_DIR}" "${arg_SOURCES}" "") 50 pw_add_library_generic("${NAME}._sources" INTERFACE 51 HEADERS 52 ${abs_sources} 53 PUBLIC_INCLUDES 54 ${abs_import_dirs} 55 ) 56 57 # Build up a list of other `emb` sources the generate step depends on. We 58 # use this rather than the full emboss_cc_library so that the generate steps 59 # can run in parallel. 60 set(source_deps "${arg_DEPS}") 61 list(TRANSFORM source_deps APPEND ._sources) 62 63 # We need to extract the actual files from the targets for them to work 64 # as proper dependencies for `add_custom_command`. 65 set(dependent_sources "") 66 foreach(dep IN LISTS source_deps) 67 get_target_property(sources ${dep} SOURCES) 68 list(APPEND dependent_sources ${sources}) 69 get_target_property( 70 imports ${dep}._public_config INTERFACE_INCLUDE_DIRECTORIES) 71 list(APPEND abs_import_dirs ${imports}) 72 endforeach() 73 74 # Setup the emboss command: 75 # python3 $runner $embossc --generate cc --output-path $out_dir \ 76 # --import-dir ... --import-dir ... $source 77 set(embossc "${dir_pw_third_party_emboss}/embossc") 78 set(runner "$ENV{PW_ROOT}/third_party/emboss/embossc_runner.py") 79 80 list(APPEND emboss_cmd python3 "-OO" 81 "${runner}" "${embossc}" "--generate" "cc" "--no-cc-enum-traits" 82 "--output-path" "${out_dir}") 83 84 foreach(impt IN LISTS abs_import_dirs) 85 list(APPEND emboss_cmd "--import-dir" "${impt}") 86 endforeach() 87 88 list(APPEND emboss_cmd "${arg_SOURCES}") 89 90 # Define the command to generate $outputs 91 add_custom_command( 92 COMMAND 93 ${emboss_cmd} 94 DEPENDS 95 ${runner} 96 ${arg_SOURCES} 97 ${dependent_sources} 98 OUTPUT 99 ${outputs}) 100 # Tie a target to $outputs that will trigger the command 101 add_custom_target("${NAME}._generate" DEPENDS ${outputs}) 102 103 # Export a library that exposes the generated outputs 104 pw_add_library_generic("${NAME}" INTERFACE 105 PUBLIC_INCLUDES 106 "${out_dir}/public" 107 "${output_include_path}" 108 PUBLIC_DEPS 109 pw_third_party.emboss.cpp_utils 110 ${arg_DEPS}) 111 # Tie in the generated outputs as a dep of the library 112 add_dependencies("${NAME}" "${NAME}._generate") 113endfunction(emboss_cc_library) 114