Use ExternalProject_Add to build the examples in a stand-alone fashion.
This commit is contained in:
Walter Gray
parent
71556295ff
commit
09f6a5c1d2
@ -2,9 +2,56 @@ if(protobuf_VERBOSE)
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message(STATUS "Protocol Buffers Examples Configuring...")
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endif()
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# Add examples subproject
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add_subdirectory(../examples examples)
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get_filename_component(examples_dir "../examples" ABSOLUTE)
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if(protobuf_VERBOSE)
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message(STATUS "Protocol Buffers Examples Configuring done")
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endif()
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include(ExternalProject)
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# Internal utility function: Create a custom target representing a build of examples with custom options.
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function(add_examples_build NAME)
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ExternalProject_Add(${NAME}
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PREFIX ${NAME}
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SOURCE_DIR "${examples_dir}"
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BINARY_DIR ${NAME}
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STAMP_DIR ${NAME}/logs
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INSTALL_COMMAND "" #Skip
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LOG_CONFIGURE 1
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CMAKE_CACHE_ARGS "-Dprotobuf_MSVC_STATIC_RUNTIME:BOOL=${protobuf_MSVC_STATIC_RUNTIME}"
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"-DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}"
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"-Dprotobuf_VERBOSE:BOOL=${protobuf_VERBOSE}"
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${ARGN}
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)
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set_property(TARGET ${NAME} PROPERTY FOLDER "Examples")
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set_property(TARGET ${NAME} PROPERTY EXCLUDE_FROM_ALL TRUE)
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endfunction()
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# Add examples as an external project.
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# sub_directory cannot be used because the find_package(protobuf) call would cause failures with redefined targets.
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add_examples_build(examples "-Dprotobuf_DIR:PATH=${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_CMAKEDIR}")
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add_dependencies(examples libprotobuf protoc)
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option(protobuf_BUILD_EXAMPLES_MULTITEST "Build Examples in multiple configurations. Useful for testing." OFF)
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mark_as_advanced(protobuf_BUILD_EXAMPLES_MULTITEST)
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if(protobuf_BUILD_EXAMPLES_MULTITEST)
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set_property(GLOBAL PROPERTY USE_FOLDERS ON)
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#Build using the legacy compatiblity module.
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add_examples_build(examples-legacy
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"-Dprotobuf_DIR:PATH=${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_CMAKEDIR}"
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"-Dprotobuf_MODULE_COMPATIBLE:BOOL=TRUE"
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)
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add_dependencies(examples-legacy libprotobuf protoc)
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#Build using the installed library.
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add_examples_build(examples-installed
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"-Dprotobuf_DIR:PATH=${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_CMAKEDIR}"
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)
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#Build using the installed library in legacy compatiblity mode.
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add_examples_build(examples-installed-legacy
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"-Dprotobuf_DIR:PATH=${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_CMAKEDIR}"
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"-Dprotobuf_MODULE_COMPATIBLE:BOOL=TRUE"
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)
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endif()
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@ -2,78 +2,62 @@
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cmake_minimum_required(VERSION 2.8.12)
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# Project
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project(addressbook)
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project(protobuf-examples)
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# Find required protobuf package
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find_package(protobuf 3 CONFIG REQUIRED)
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find_package(protobuf CONFIG REQUIRED)
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if(protobuf_VERBOSE)
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message(STATUS "Using Protocol Buffers ${Protobuf_VERSION}")
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endif()
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file(GLOB SRC_LIST "*.cc")
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file(GLOB PROTO_LIST "*.proto")
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#
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# Code generation
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#
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if(protobuf_MODULE_COMPATIBLE) # Old school
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include_directories(${Protobuf_INCLUDE_DIRS})
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protobuf_generate_cpp(PROTO_SRCS PROTO_HDRS ${PROTO_LIST})
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else() # New style
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set(PROTO_SRCS)
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set(PROTO_HDRS)
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foreach(FIL ${PROTO_LIST})
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get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
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get_filename_component(FIL_WE ${FIL} NAME_WE)
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list(APPEND PROTO_SRCS "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
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list(APPEND PROTO_HDRS "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
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add_custom_command(
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OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
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"${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
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COMMAND protobuf::protoc
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ARGS --cpp_out ${CMAKE_CURRENT_BINARY_DIR} -I ${CMAKE_CURRENT_SOURCE_DIR}
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${ABS_FIL}
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DEPENDS ${ABS_FIL}
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COMMENT "Running C++ protocol buffer compiler on ${FIL}"
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VERBATIM)
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set(CMAKE_INCLUDE_CURRENT_DIR TRUE)
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# http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
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if(MSVC AND protobuf_MSVC_STATIC_RUNTIME)
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foreach(flag_var
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CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
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CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
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if(${flag_var} MATCHES "/MD")
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string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
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endif(${flag_var} MATCHES "/MD")
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endforeach()
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endif()
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include_directories(${CMAKE_CURRENT_BINARY_DIR})
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foreach(example add_person list_people)
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set(${example}_SRCS ${example}.cc)
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set(${example}_PROTOS addressbook.proto)
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include(GNUInstallDirs)
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#Code Generation
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if(protobuf_MODULE_COMPATIBLE) #Legacy Support
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protobuf_generate_cpp(${example}_PROTO_SRCS ${example}_PROTO_HDRS ${${example}_PROTOS})
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list(APPEND ${example}_SRCS ${${example}_PROTO_SRCS} ${${example}_PROTO_HDRS})
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else()
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foreach(FIL ${SRC_LIST})
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foreach(proto_file ${${example}_PROTOS})
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get_filename_component(proto_file_abs ${proto_file} ABSOLUTE)
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get_filename_component(basename ${proto_file} NAME_WE)
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set(generated_files ${basename}.pb.cc ${basename}.pb.h)
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list(APPEND ${example}_SRCS ${generated_files})
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get_filename_component(FIL_NAME_WE ${FIL} NAME_WE)
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set(APP ${FIL_NAME_WE}_cpp)
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add_executable(${APP} ${FIL} ${PROTO_SRCS} ${PROTO_HDRS})
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#
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# Link libraries
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#
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if(protobuf_MODULE_COMPATIBLE) # Old school
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target_link_libraries(${APP} ${Protobuf_LIBRARIES})
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else() # New style
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target_link_libraries(${APP} protobuf::libprotobuf)
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add_custom_command(
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OUTPUT ${generated_files}
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COMMAND protobuf::protoc
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ARGS --cpp_out ${CMAKE_CURRENT_BINARY_DIR} -I ${CMAKE_CURRENT_SOURCE_DIR} ${proto_file_abs}
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COMMENT "Generating ${generated_files} from ${proto_file}"
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VERBATIM
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)
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endforeach()
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endif()
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install(TARGETS ${APP}
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RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR} COMPONENT ${APP})
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#Executable setup
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set(executable_name ${example}_cpp)
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add_executable(${executable_name} ${${example}_SRCS} ${${example}_PROTOS})
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if(protobuf_MODULE_COMPATIBLE) #Legacy mode
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target_include_directories(${executable_name} PUBLIC ${PROTOBUF_INCLUDE_DIRS})
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target_link_libraries(${executable_name} ${PROTOBUF_LIBRARIES})
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else()
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target_link_libraries(${executable_name} protobuf::libprotobuf)
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endif()
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endforeach()
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