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1cmake_minimum_required(VERSION 2.8.12)
2
3project(nanopb C)
4
5set(nanopb_VERSION_STRING nanopb-0.3.9.1)
6
7string(REPLACE "nanopb-" "" nanopb_VERSION ${nanopb_VERSION_STRING})
8
9option(nanopb_BUILD_RUNTIME "Build the headers and libraries needed at runtime" ON)
10option(nanopb_BUILD_GENERATOR "Build the protoc plugin for code generation" ON)
11option(nanopb_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON)
12
13if(NOT DEFINED nanopb_PROTOC_PATH)
14    set(nanopb_PROTOC_PATH "protoc")
15endif()
16
17if(NOT DEFINED CMAKE_DEBUG_POSTFIX)
18    set(CMAKE_DEBUG_POSTFIX "d")
19endif()
20
21include(GNUInstallDirs)
22
23if(MSVC AND nanopb_MSVC_STATIC_RUNTIME)
24    foreach(flag_var
25            CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
26            CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
27        if(${flag_var} MATCHES "/MD")
28            string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
29        endif(${flag_var} MATCHES "/MD")
30    endforeach(flag_var)
31endif()
32
33if(NOT DEFINED CMAKE_INSTALL_CMAKEDIR)
34    set(CMAKE_INSTALL_CMAKEDIR "lib/cmake/nanopb")
35endif()
36
37if(nanopb_BUILD_GENERATOR)
38    set(generator_protos nanopb plugin)
39
40    find_package(PythonInterp 2.7 REQUIRED)
41    execute_process(
42        COMMAND ${PYTHON_EXECUTABLE} -c
43            "from distutils import sysconfig; print(sysconfig.get_python_lib(prefix=''))"
44        OUTPUT_VARIABLE PYTHON_INSTDIR
45        OUTPUT_STRIP_TRAILING_WHITESPACE
46    )
47
48    foreach(generator_proto IN LISTS generator_protos)
49        string(REGEX REPLACE "([^;]+)" "${PROJECT_SOURCE_DIR}/generator/proto/\\1.proto" generator_proto_file "${generator_proto}")
50        string(REGEX REPLACE "([^;]+)" "\\1_pb2.py" generator_proto_py_file "${generator_proto}")
51        add_custom_command(
52            OUTPUT ${generator_proto_py_file}
53            COMMAND ${nanopb_PROTOC_PATH} --python_out=${PROJECT_BINARY_DIR} -I${PROJECT_SOURCE_DIR}/generator/proto ${generator_proto_file}
54            DEPENDS ${generator_proto_file}
55        )
56        add_custom_target("generate_${generator_proto_py_file}" ALL DEPENDS ${generator_proto_py_file})
57        install(
58            FILES ${PROJECT_BINARY_DIR}/${generator_proto_py_file}
59			DESTINATION ${PYTHON_INSTDIR}
60        )
61    endforeach()
62endif()
63
64if(nanopb_BUILD_RUNTIME)
65    add_library(protobuf-nanopb STATIC
66        pb.h
67        pb_common.h
68        pb_common.c
69        pb_encode.h
70        pb_encode.c
71        pb_decode.h
72        pb_decode.c)
73
74    target_include_directories(protobuf-nanopb INTERFACE
75      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
76    )
77
78    configure_file(extra/nanopb-config-version.cmake.in
79        nanopb-config-version.cmake @ONLY)
80
81    install(TARGETS protobuf-nanopb EXPORT nanopb-targets
82        ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
83
84    install(EXPORT nanopb-targets
85        DESTINATION ${CMAKE_INSTALL_CMAKEDIR}
86        NAMESPACE nanopb::)
87
88    install(FILES extra/nanopb-config.cmake
89        ${CMAKE_CURRENT_BINARY_DIR}/nanopb-config-version.cmake
90        DESTINATION ${CMAKE_INSTALL_CMAKEDIR})
91
92    install(FILES pb.h pb_common.h pb_encode.h pb_decode.h
93        DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
94endif()
95