/
FindGRPC.cmake
126 lines (112 loc) · 4.19 KB
/
FindGRPC.cmake
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#
# Locate and configure the gRPC library
#
# Adds the following targets:
#
# gRPC::grpc - gRPC library
# gRPC::grpc++ - gRPC C++ library
# gRPC::grpc++_reflection - gRPC C++ reflection library
# gRPC::grpc_cpp_plugin - C++ generator plugin for Protocol Buffers
#
#
# Generates C++ sources from the .proto files
#
# grpc_generate_cpp (<SRCS> <HDRS> <DEST> [<ARGN>...])
#
# SRCS - variable to define with autogenerated source files
# HDRS - variable to define with autogenerated header files
# DEST - directory where the source files will be created
# ARGN - .proto files
#
function(GRPC_GENERATE_CPP SRCS HDRS DEST)
if(NOT ARGN)
message(SEND_ERROR "Error: GRPC_GENERATE_CPP() called without any proto files")
return()
endif()
if(GRPC_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 ${SRCS} "${DEST}/${FIL_WE}.grpc.pb.cc")
list(APPEND ${HDRS} "${DEST}/${FIL_WE}.grpc.pb.h")
add_custom_command(
OUTPUT "${DEST}/${FIL_WE}.grpc.pb.cc"
"${DEST}/${FIL_WE}.grpc.pb.h"
COMMAND protobuf::protoc
ARGS --grpc_out ${DEST} ${_protobuf_include_path} --plugin=protoc-gen-grpc=${GRPC_CPP_PLUGIN} ${ABS_FIL}
DEPENDS ${ABS_FIL} protobuf::protoc gRPC::grpc_cpp_plugin
COMMENT "Running C++ gRPC 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()
# By default have GRPC_GENERATE_CPP macro pass -I to protoc
# for each directory where a proto file is referenced.
if(NOT DEFINED GRPC_GENERATE_CPP_APPEND_PATH)
set(GRPC_GENERATE_CPP_APPEND_PATH TRUE)
endif()
# Find gRPC include directory
find_path(GRPC_INCLUDE_DIR grpc/grpc.h)
mark_as_advanced(GRPC_INCLUDE_DIR)
# Find gRPC library
find_library(GRPC_LIBRARY NAMES grpc)
mark_as_advanced(GRPC_LIBRARY)
add_library(gRPC::grpc UNKNOWN IMPORTED)
set_target_properties(gRPC::grpc PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${GRPC_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES "-lpthread;-ldl"
IMPORTED_LOCATION ${GRPC_LIBRARY}
)
# Find gRPC C++ library
find_library(GRPC_GRPC++_LIBRARY NAMES grpc++)
mark_as_advanced(GRPC_GRPC++_LIBRARY)
add_library(gRPC::grpc++ UNKNOWN IMPORTED)
set_target_properties(gRPC::grpc++ PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${GRPC_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES gRPC::grpc
IMPORTED_LOCATION ${GRPC_GRPC++_LIBRARY}
)
# Find gRPC C++ reflection library
find_library(GRPC_GRPC++_REFLECTION_LIBRARY NAMES grpc++_reflection)
mark_as_advanced(GRPC_GRPC++_REFLECTION_LIBRARY)
add_library(gRPC::grpc++_reflection UNKNOWN IMPORTED)
set_target_properties(gRPC::grpc++_reflection PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES ${GRPC_INCLUDE_DIR}
INTERFACE_LINK_LIBRARIES gRPC::grpc++
IMPORTED_LOCATION ${GRPC_GRPC++_REFLECTION_LIBRARY}
)
# Find gRPC CPP generator
find_program(GRPC_CPP_PLUGIN NAMES grpc_cpp_plugin)
mark_as_advanced(GRPC_CPP_PLUGIN)
add_executable(gRPC::grpc_cpp_plugin IMPORTED)
set_target_properties(gRPC::grpc_cpp_plugin PROPERTIES
IMPORTED_LOCATION ${GRPC_CPP_PLUGIN}
)
include(${CMAKE_ROOT}/Modules/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(gRPC DEFAULT_MSG
GRPC_LIBRARY GRPC_INCLUDE_DIR GRPC_GRPC++_REFLECTION_LIBRARY GRPC_CPP_PLUGIN)