Open Source Computer Vision Library https://opencv.org/
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# If protobuf is found - libprotobuf target is available
set(HAVE_PROTOBUF FALSE)
if(NOT WITH_PROTOBUF)
return()
endif()
ocv_option(BUILD_PROTOBUF "Force to build libprotobuf from sources" ON)
ocv_option(PROTOBUF_UPDATE_FILES "Force rebuilding .proto files (protoc should be available)" OFF)
function(get_protobuf_version version include)
file(STRINGS "${include}/google/protobuf/stubs/common.h" ver REGEX "#define GOOGLE_PROTOBUF_VERSION [0-9]+")
string(REGEX MATCHALL "[0-9]+" ver ${ver})
math(EXPR major "${ver} / 1000000")
math(EXPR minor "${ver} / 1000 % 1000")
math(EXPR patch "${ver} % 1000")
set(${version} "${major}.${minor}.${patch}" PARENT_SCOPE)
endfunction()
if(BUILD_PROTOBUF)
add_subdirectory("${OpenCV_SOURCE_DIR}/3rdparty/protobuf")
set(HAVE_PROTOBUF TRUE)
else()
unset(Protobuf_VERSION CACHE)
find_package(Protobuf QUIET)
# Backwards compatibility
# Define camel case versions of input variables
foreach(UPPER
PROTOBUF_FOUND
PROTOBUF_LIBRARY
PROTOBUF_INCLUDE_DIR
PROTOBUF_VERSION
)
if (DEFINED ${UPPER})
string(REPLACE "PROTOBUF_" "Protobuf_" Camel ${UPPER})
if (NOT DEFINED ${Camel})
set(${Camel} ${${UPPER}})
endif()
endif()
endforeach()
# end of compatibility block
if(Protobuf_FOUND)
if(TARGET protobuf::libprotobuf)
add_library(libprotobuf INTERFACE)
target_link_libraries(libprotobuf INTERFACE protobuf::libprotobuf)
else()
add_library(libprotobuf UNKNOWN IMPORTED)
set_target_properties(libprotobuf PROPERTIES
IMPORTED_LOCATION "${Protobuf_LIBRARY}"
INTERFACE_INCLUDE_DIRECTORIES "${Protobuf_INCLUDE_DIR}"
INTERFACE_SYSTEM_INCLUDE_DIRECTORIES "${Protobuf_INCLUDE_DIR}"
)
get_protobuf_version(Protobuf_VERSION "${Protobuf_INCLUDE_DIR}")
endif()
set(HAVE_PROTOBUF TRUE)
endif()
endif()
if(HAVE_PROTOBUF AND PROTOBUF_UPDATE_FILES AND NOT COMMAND PROTOBUF_GENERATE_CPP)
find_package(Protobuf QUIET)
if(NOT COMMAND PROTOBUF_GENERATE_CPP)
message(FATAL_ERROR "PROTOBUF_GENERATE_CPP command is not available")
endif()
endif()
if(HAVE_PROTOBUF)
list(APPEND CUSTOM_STATUS protobuf)
list(APPEND CUSTOM_STATUS_protobuf " Protobuf:"
BUILD_PROTOBUF THEN "build (${Protobuf_VERSION})"
ELSE "${Protobuf_LIBRARY} (${Protobuf_VERSION})")
endif()