mirror of
https://github.com/google/flatbuffers.git
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flatbuffers/cmake: move build_flatbuffers to a standalone file
So that it could be included from both flatbuffers CMakeLists.txt and FindFlatBuffers.cmake. Change-Id: Ie16a879beef9367cd6fd9b2d2157044841a7cdbc
This commit is contained in:
Johan Euphrosine
141
CMake/BuildFlatBuffers.cmake
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141
CMake/BuildFlatBuffers.cmake
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@@ -0,0 +1,141 @@
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# Copyright 2015 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# General function to create FlatBuffer build rules for the given list of
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# schemas.
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#
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# flatbuffers_schemas: A list of flatbuffer schema files to process.
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#
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# schema_include_dirs: A list of schema file include directories, which will be
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# passed to flatc via the -I parameter.
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#
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# custom_target_name: The generated files will be added as dependencies for a
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# new custom target with this name. You should add that target as a dependency
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# for your main target to ensure these files are built. You can also retrieve
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# various properties from this target, such as GENERATED_INCLUDES_DIR,
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# BINARY_SCHEMAS_DIR, and COPY_TEXT_SCHEMAS_DIR.
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#
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# additional_dependencies: A list of additional dependencies that you'd like
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# all generated files to depend on. Pass in a blank string if you have none.
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#
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# generated_includes_dir: Where to generate the C++ header files for these
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# schemas. The generated includes directory will automatically be added to
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# CMake's include directories, and will be where generated header files are
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# placed. This parameter is optional; pass in empty string if you don't want to
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# generate include files for these schemas.
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#
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# binary_schemas_dir: If you specify an optional binary schema directory, binary
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# schemas will be generated for these schemas as well, and placed into the given
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# directory.
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#
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# copy_text_schemas_dir: If you want all text schemas (including schemas from
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# all schema include directories) copied into a directory (for example, if you
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# need them within your project to build JSON files), you can specify that
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# folder here. All text schemas will be copied to that folder.
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#
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# IMPORTANT: Make sure you quote all list arguments you pass to this function!
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# Otherwise CMake will only pass in the first element.
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# Example: build_flatbuffers("${fb_files}" "${include_dirs}" target_name ...)
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function(build_flatbuffers flatbuffers_schemas
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schema_include_dirs
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custom_target_name
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additional_dependencies
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generated_includes_dir
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binary_schemas_dir
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copy_text_schemas_dir)
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# Test if including from FindFlatBuffers
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if(FLATBUFFERS_FLATC_EXECUTABLE)
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set(FLATC_TARGET "")
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set(FLATC ${FLATBUFFERS_FLATC_EXECUTABLE})
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else()
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set(FLATC_TARGET flatc)
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set(FLATC flatc)
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endif()
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set(schema_glob "*.fbs")
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# Generate the include files parameters.
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set(include_params "")
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set(all_generated_files "")
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foreach (include_dir ${schema_include_dirs})
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set(include_params -I ${include_dir} ${include_params})
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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# Copy text schemas from dependent folders.
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file(GLOB_RECURSE dependent_schemas ${include_dir}/${schema_glob})
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foreach (dependent_schema ${dependent_schemas})
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file(COPY ${dependent_schema} DESTINATION ${copy_text_schemas_dir})
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endforeach()
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endif()
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endforeach()
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foreach(schema ${flatbuffers_schemas})
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get_filename_component(filename ${schema} NAME_WE)
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# For each schema, do the things we requested.
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if (NOT ${generated_includes_dir} STREQUAL "")
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set(generated_include ${generated_includes_dir}/${filename}_generated.h)
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add_custom_command(
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OUTPUT ${generated_include}
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COMMAND ${FLATC} --gen-mutable
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-o ${generated_includes_dir}
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${include_params}
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-c ${schema}
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DEPENDS ${FLATC_TARGET} ${schema} ${additional_dependencies})
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list(APPEND all_generated_files ${generated_include})
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endif()
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if (NOT ${binary_schemas_dir} STREQUAL "")
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set(binary_schema ${binary_schemas_dir}/${filename}.bfbs)
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add_custom_command(
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OUTPUT ${binary_schema}
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COMMAND ${FLATC} -b --schema
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-o ${binary_schemas_dir}
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${include_params}
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${schema}
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DEPENDS ${FLATC_TARGET} ${schema} ${additional_dependencies})
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list(APPEND all_generated_files ${binary_schema})
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endif()
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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file(COPY ${schema} DESTINATION ${copy_text_schemas_dir})
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endif()
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endforeach()
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# Create a custom target that depends on all the generated files.
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# This is the target that you can depend on to trigger all these
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# to be built.
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add_custom_target(${custom_target_name}
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DEPENDS ${all_generated_files} ${additional_dependencies})
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# Register the include directory we are using.
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if (NOT ${generated_includes_dir} STREQUAL "")
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include_directories(${generated_includes_dir})
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set_property(TARGET ${custom_target_name}
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PROPERTY GENERATED_INCLUDES_DIR
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${generated_includes_dir})
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endif()
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# Register the binary schemas dir we are using.
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if (NOT ${binary_schemas_dir} STREQUAL "")
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set_property(TARGET ${custom_target_name}
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PROPERTY BINARY_SCHEMAS_DIR
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${binary_schemas_dir})
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endif()
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# Register the text schema copy dir we are using.
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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set_property(TARGET ${custom_target_name}
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PROPERTY COPY_TEXT_SCHEMAS_DIR
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${copy_text_schemas_dir})
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endif()
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endfunction()
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@@ -24,6 +24,8 @@
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# for the given flatbuffer schema files.
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# Returns the header files in ${Name}_OUTPUTS
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set(FLATBUFFERS_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
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find_program(FLATBUFFERS_FLATC_EXECUTABLE NAMES flatc)
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find_path(FLATBUFFERS_INCLUDE_DIR NAMES flatbuffers/flatbuffers.h)
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@@ -54,3 +56,5 @@ if(FLATBUFFERS_FOUND)
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else()
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set(FLATBUFFERS_INCLUDE_DIR)
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endif()
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include("${FLATBUFFERS_CMAKE_DIR}/BuildFlatBuffers.cmake")
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120
CMakeLists.txt
120
CMakeLists.txt
@@ -129,124 +129,6 @@ function(compile_flatbuffers_schema_to_binary SRC_FBS)
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DEPENDS flatc)
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endfunction()
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# General function to create FlatBuffer build rules for the given list of
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# schemas.
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#
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# flatbuffers_schemas: A list of flatbuffer schema files to process.
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#
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# schema_include_dirs: A list of schema file include directories, which will be
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# passed to flatc via the -I parameter.
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#
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# custom_target_name: The generated files will be added as dependencies for a
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# new custom target with this name. You should add that target as a dependency
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# for your main target to ensure these files are built. You can also retrieve
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# various properties from this target, such as GENERATED_INCLUDES_DIR,
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# BINARY_SCHEMAS_DIR, and COPY_TEXT_SCHEMAS_DIR.
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#
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# additional_dependencies: A list of additional dependencies that you'd like
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# all generated files to depend on. Pass in a blank string if you have none.
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#
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# generated_includes_dir: Where to generate the C++ header files for these
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# schemas. The generated includes directory will automatically be added to
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# CMake's include directories, and will be where generated header files are
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# placed. This parameter is optional; pass in empty string if you don't want to
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# generate include files for these schemas.
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#
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# binary_schemas_dir: If you specify an optional binary schema directory, binary
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# schemas will be generated for these schemas as well, and placed into the given
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# directory.
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#
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# copy_text_schemas_dir: If you want all text schemas (including schemas from
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# all schema include directories) copied into a directory (for example, if you
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# need them within your project to build JSON files), you can specify that
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# folder here. All text schemas will be copied to that folder.
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#
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# IMPORTANT: Make sure you quote all list arguments you pass to this function!
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# Otherwise CMake will only pass in the first element.
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# Example: build_flatbuffers("${fb_files}" "${include_dirs}" target_name ...)
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function(build_flatbuffers flatbuffers_schemas
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schema_include_dirs
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custom_target_name
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additional_dependencies
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generated_includes_dir
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binary_schemas_dir
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copy_text_schemas_dir)
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set(schema_glob "*.fbs")
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# Generate the include files parameters.
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set(include_params "")
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set(all_generated_files "")
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foreach (include_dir ${schema_include_dirs})
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set(include_params -I ${include_dir} ${include_params})
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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# Copy text schemas from dependent folders.
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file(GLOB_RECURSE dependent_schemas ${include_dir}/${schema_glob})
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foreach (dependent_schema ${dependent_schemas})
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file(COPY ${dependent_schema} DESTINATION ${copy_text_schemas_dir})
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endforeach()
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endif()
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endforeach()
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foreach(schema ${flatbuffers_schemas})
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get_filename_component(filename ${schema} NAME_WE)
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# For each schema, do the things we requested.
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if (NOT ${generated_includes_dir} STREQUAL "")
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set(generated_include ${generated_includes_dir}/${filename}_generated.h)
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add_custom_command(
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OUTPUT ${generated_include}
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COMMAND flatc --gen-mutable
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-o ${generated_includes_dir}
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${include_params}
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-c ${schema}
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DEPENDS flatc ${schema} ${additional_dependencies})
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list(APPEND all_generated_files ${generated_include})
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endif()
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if (NOT ${binary_schemas_dir} STREQUAL "")
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set(binary_schema ${binary_schemas_dir}/${filename}.bfbs)
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add_custom_command(
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OUTPUT ${binary_schema}
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COMMAND flatc -b --schema
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-o ${binary_schemas_dir}
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${include_params}
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${schema}
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DEPENDS flatc ${schema} ${additional_dependencies})
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list(APPEND all_generated_files ${binary_schema})
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endif()
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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file(COPY ${schema} DESTINATION ${copy_text_schemas_dir})
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endif()
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endforeach()
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# Create a custom target that depends on all the generated files.
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# This is the target that you can depend on to trigger all these
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# to be built.
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add_custom_target(${custom_target_name}
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DEPENDS ${all_generated_files} ${additional_dependencies})
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# Register the include directory we are using.
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if (NOT ${generated_includes_dir} STREQUAL "")
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include_directories(${generated_includes_dir})
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set_property(TARGET ${custom_target_name}
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PROPERTY GENERATED_INCLUDES_DIR
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${generated_includes_dir})
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endif()
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# Register the binary schemas dir we are using.
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if (NOT ${binary_schemas_dir} STREQUAL "")
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set_property(TARGET ${custom_target_name}
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PROPERTY BINARY_SCHEMAS_DIR
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${binary_schemas_dir})
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endif()
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# Register the text schema copy dir we are using.
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if (NOT ${copy_text_schemas_dir} STREQUAL "")
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set_property(TARGET ${custom_target_name}
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PROPERTY COPY_TEXT_SCHEMAS_DIR
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${copy_text_schemas_dir})
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endif()
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endfunction()
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if(FLATBUFFERS_BUILD_TESTS)
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compile_flatbuffers_schema_to_cpp(tests/monster_test.fbs)
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include_directories(${CMAKE_CURRENT_BINARY_DIR}/tests)
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@@ -275,3 +157,5 @@ if(FLATBUFFERS_BUILD_TESTS)
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"${CMAKE_CURRENT_BINARY_DIR}")
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add_test(NAME flattests COMMAND flattests)
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endif()
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include(CMake/BuildFlatBuffers.cmake)
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