CMakeLists.txt

   1 cmake_minimum_required(VERSION 2.8)
   2
   3 project(nanopb C)
   4
   5 set(nanopb_VERSION_STRING nanopb-0.3.9-dev)
   6
   7 string(REPLACE "nanopb-" "" nanopb_VERSION ${nanopb_VERSION_STRING})
   8
   9 option(nanopb_BUILD_RUNTIME "Build the headers and libraries needed at runtime" ON)
  10 option(nanopb_BUILD_GENERATOR "Build the protoc plugin for code generation" ON)
  11 option(nanopb_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON)
  12
  13 if(NOT DEFINED CMAKE_DEBUG_POSTFIX)
  14     set(CMAKE_DEBUG_POSTFIX "d")
  15 endif()
  16
  17 include(GNUInstallDirs)
  18
  19 if(MSVC AND nanopb_MSVC_STATIC_RUNTIME)
  20     foreach(flag_var
  21             CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
  22             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
  23         if(${flag_var} MATCHES "/MD")
  24             string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
  25         endif(${flag_var} MATCHES "/MD")
  26     endforeach(flag_var)
  27 endif()
  28
  29 if(NOT DEFINED CMAKE_INSTALL_CMAKEDIR)
  30     set(CMAKE_INSTALL_CMAKEDIR "lib/cmake/nanopb")
  31 endif()
  32
  33 if(nanopb_BUILD_GENERATOR)
  34     set(generator_protos nanopb plugin)
  35
  36     find_package(PythonInterp 2.7 REQUIRED)
  37     execute_process(
  38         COMMAND ${PYTHON_EXECUTABLE} -c
  39             "from distutils import sysconfig; print(sysconfig.get_python_lib(prefix='${CMAKE_INSTALL_PREFIX}'))"
  40         OUTPUT_VARIABLE PYTHON_INSTDIR
  41         OUTPUT_STRIP_TRAILING_WHITESPACE
  42     )
  43
  44     foreach(generator_proto IN LISTS generator_protos)
  45         string(REGEX REPLACE "([^;]+)" "${PROJECT_SOURCE_DIR}/generator/proto/\\1.proto" generator_proto_file "${generator_proto}")
  46         string(REGEX REPLACE "([^;]+)" "\\1_pb2.py" generator_proto_py_file "${generator_proto}")
  47         add_custom_command(
  48             OUTPUT ${generator_proto_py_file}
  49             COMMAND protoc --python_out=${PROJECT_BINARY_DIR} -I${PROJECT_SOURCE_DIR}/generator/proto ${generator_proto_file}
  50             DEPENDS ${generator_proto_file}
  51         )
  52         add_custom_target("generate_${generator_proto_py_file}" ALL DEPENDS ${generator_proto_py_file})
  53         install(
  54             FILES ${PROJECT_BINARY_DIR}/${generator_proto_py_file}
  55                         DESTINATION ${PYTHON_INSTDIR}
  56         )
  57     endforeach()
  58 endif()
  59
  60 if(nanopb_BUILD_RUNTIME)
  61     add_library(protobuf-nanopb STATIC
  62         pb.h
  63         pb_common.h
  64         pb_common.c
  65         pb_encode.h
  66         pb_encode.c
  67         pb_decode.h
  68         pb_decode.c)
  69
  70     target_include_directories(protobuf-nanopb INTERFACE
  71       $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
  72     )
  73
  74     configure_file(extra/nanopb-config-version.cmake.in
  75         nanopb-config-version.cmake @ONLY)
  76
  77     install(TARGETS protobuf-nanopb EXPORT nanopb-targets
  78         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
  79
  80     install(EXPORT nanopb-targets
  81         DESTINATION ${CMAKE_INSTALL_CMAKEDIR}
  82         NAMESPACE nanopb::)
  83
  84     install(FILES extra/nanopb-config.cmake
  85         ${CMAKE_CURRENT_BINARY_DIR}/nanopb-config-version.cmake
  86         DESTINATION ${CMAKE_INSTALL_CMAKEDIR})
  87
  88     install(FILES pb.h pb_common.h pb_encode.h pb_decode.h
  89         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
  90 endif()