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protobuf-module.cmake.in
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# Functions
function(PROTOBUF_GENERATE_CPP SRCS HDRS)
if(NOT ARGN)
message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
return()
endif()
if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
# Create an include path for each file specified
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(ABS_PATH ${ABS_FIL} PATH)
list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _protobuf_include_path -I ${ABS_PATH})
endif()
endforeach()
else()
set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
endif()
if(DEFINED Protobuf_IMPORT_DIRS)
foreach(DIR ${Protobuf_IMPORT_DIRS})
get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _protobuf_include_path -I ${ABS_PATH})
endif()
endforeach()
endif()
set(${SRCS})
set(${HDRS})
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
COMMAND ${Protobuf_PROTOC_EXECUTABLE}
ARGS --cpp_out ${CMAKE_CURRENT_BINARY_DIR} ${_protobuf_include_path} ${ABS_FIL}
DEPENDS ${ABS_FIL} ${Protobuf_PROTOC_EXECUTABLE}
COMMENT "Running C++ protocol buffer compiler on ${FIL}"
VERBATIM )
endforeach()
set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
set(${SRCS} ${${SRCS}} PARENT_SCOPE)
set(${HDRS} ${${HDRS}} PARENT_SCOPE)
endfunction()
function(PROTOBUF_GENERATE_PYTHON SRCS)
if(NOT ARGN)
message(SEND_ERROR "Error: PROTOBUF_GENERATE_PYTHON() called without any proto files")
return()
endif()
if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
# Create an include path for each file specified
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(ABS_PATH ${ABS_FIL} PATH)
list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _protobuf_include_path -I ${ABS_PATH})
endif()
endforeach()
else()
set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
endif()
if(DEFINED Protobuf_IMPORT_DIRS)
foreach(DIR ${Protobuf_IMPORT_DIRS})
get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
if(${_contains_already} EQUAL -1)
list(APPEND _protobuf_include_path -I ${ABS_PATH})
endif()
endforeach()
endif()
set(${SRCS})
foreach(FIL ${ARGN})
get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
get_filename_component(FIL_WE ${FIL} NAME_WE)
list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}_pb2.py")
add_custom_command(
OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}_pb2.py"
COMMAND ${Protobuf_PROTOC_EXECUTABLE} --python_out ${CMAKE_CURRENT_BINARY_DIR} ${_protobuf_include_path} ${ABS_FIL}
DEPENDS ${ABS_FIL} ${Protobuf_PROTOC_EXECUTABLE}
COMMENT "Running Python protocol buffer compiler on ${FIL}"
VERBATIM )
endforeach()
set(${SRCS} ${${SRCS}} PARENT_SCOPE)
endfunction()
# Environment
# Backwards compatibility
# Define camel case versions of input variables
foreach(UPPER
PROTOBUF_SRC_ROOT_FOLDER
PROTOBUF_IMPORT_DIRS
PROTOBUF_DEBUG
PROTOBUF_LIBRARY
PROTOBUF_PROTOC_LIBRARY
PROTOBUF_INCLUDE_DIR
PROTOBUF_PROTOC_EXECUTABLE
PROTOBUF_LIBRARY_DEBUG
PROTOBUF_PROTOC_LIBRARY_DEBUG
PROTOBUF_LITE_LIBRARY
PROTOBUF_LITE_LIBRARY_DEBUG
)
if (DEFINED ${UPPER})
string(REPLACE "PROTOBUF_" "Protobuf_" Camel ${UPPER})
if (NOT DEFINED ${Camel})
set(${Camel} ${${UPPER}})
endif()
endif()
endforeach()
if(DEFINED Protobuf_SRC_ROOT_FOLDER)
message(AUTHOR_WARNING "Variable Protobuf_SRC_ROOT_FOLDER defined, but not"
" used in CONFIG mode")
endif()
include(SelectLibraryConfigurations)
# Internal function: search for normal library as well as a debug one
# if the debug one is specified also include debug/optimized keywords
# in *_LIBRARIES variable
function(_protobuf_find_libraries name filename)
if(${name}_LIBRARIES)
# Use result recorded by a previous call.
elseif(${name}_LIBRARY)
# Honor cache entry used by CMake 3.5 and lower.
set(${name}_LIBRARIES "${${name}_LIBRARY}" PARENT_SCOPE)
else()
get_target_property(${name}_LIBRARY_RELEASE protobuf::lib${filename}
LOCATION_RELEASE)
get_target_property(${name}_LIBRARY_DEBUG protobuf::lib${filename}
LOCATION_DEBUG)
endif()
select_library_configurations(${name})
set(${name}_LIBRARY ${${name}_LIBRARY} PARENT_SCOPE)
set(${name}_LIBRARIES ${${name}_LIBRARIES} PARENT_SCOPE)
endif()
endfunction()
# Internal function: find threads library
function(_protobuf_find_threads)
set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
find_package(Threads)
if(Threads_FOUND)
list(APPEND PROTOBUF_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
set(PROTOBUF_LIBRARIES "${PROTOBUF_LIBRARIES}" PARENT_SCOPE)
endif()
endfunction()
#
# Main.
#
# By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
# for each directory where a proto file is referenced.
if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
endif()
# The Protobuf library
_protobuf_find_libraries(Protobuf protobuf)
# The Protobuf Lite library
_protobuf_find_libraries(Protobuf_LITE protobuf-lite)
# The Protobuf Protoc Library
_protobuf_find_libraries(Protobuf_PROTOC protoc)
if(UNIX)
_protobuf_find_threads()
endif()
# Set the include directory
get_target_property(Protobuf_INCLUDE_DIRS protobuf::libprotobuf
INTERFACE_INCLUDE_DIRECTORIES)
# Set the protoc Executable
get_target_property(Protobuf_PROTOC_EXECUTABLE protobuf::protoc
IMPORTED_LOCATION_RELEASE)
if(NOT EXISTS "${Protobuf_PROTOC_EXECUTABLE}")
get_target_property(Protobuf_PROTOC_EXECUTABLE protobuf::protoc
IMPORTED_LOCATION_DEBUG)
endif()
# Version info variable
set(Protobuf_VERSION "@protobuf_VERSION@")
include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Protobuf
REQUIRED_VARS Protobuf_PROTOC_EXECUTABLE Protobuf_LIBRARIES Protobuf_INCLUDE_DIRS
VERSION_VAR Protobuf_VERSION
)
# Backwards compatibility
# Define upper case versions of output variables
foreach(Camel
Protobuf_VERSION
Protobuf_SRC_ROOT_FOLDER
Protobuf_IMPORT_DIRS
Protobuf_DEBUG
Protobuf_INCLUDE_DIRS
Protobuf_LIBRARIES
Protobuf_PROTOC_LIBRARIES
Protobuf_LITE_LIBRARIES
Protobuf_LIBRARY
Protobuf_PROTOC_LIBRARY
Protobuf_INCLUDE_DIR
Protobuf_PROTOC_EXECUTABLE
Protobuf_LIBRARY_DEBUG
Protobuf_PROTOC_LIBRARY_DEBUG
Protobuf_LITE_LIBRARY
Protobuf_LITE_LIBRARY_DEBUG
)
string(TOUPPER ${Camel} UPPER)
set(${UPPER} ${${Camel}})
endforeach()