1if(PROTOBUF_SRC_ROOT_FOLDER)
2  message(AUTHOR_WARNING "Variable PROTOBUF_SRC_ROOT_FOLDER defined, but not"
3    " used in CONFIG mode")
4endif()
5
6function(PROTOBUF_GENERATE_CPP SRCS HDRS)
7  if(NOT ARGN)
8    message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
9    return()
10  endif()
11
12  if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
13    # Create an include path for each file specified
14    foreach(FIL ${ARGN})
15      get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
16      get_filename_component(ABS_PATH ${ABS_FIL} PATH)
17      list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
18      if(${_contains_already} EQUAL -1)
19          list(APPEND _protobuf_include_path -I ${ABS_PATH})
20      endif()
21    endforeach()
22  else()
23    set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
24  endif()
25
26  # Add well-known type protos include path
27  list(APPEND _protobuf_include_path
28    -I "${_PROTOBUF_IMPORT_PREFIX}/@CMAKE_INSTALL_INCLUDEDIR@")
29
30  if(DEFINED PROTOBUF_IMPORT_DIRS)
31    foreach(DIR ${PROTOBUF_IMPORT_DIRS})
32      get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
33      list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
34      if(${_contains_already} EQUAL -1)
35          list(APPEND _protobuf_include_path -I ${ABS_PATH})
36      endif()
37    endforeach()
38  endif()
39
40  set(${SRCS})
41  set(${HDRS})
42  foreach(FIL ${ARGN})
43    get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
44    get_filename_component(FIL_WE ${FIL} NAME_WE)
45
46    list(APPEND ${SRCS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc")
47    list(APPEND ${HDRS} "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h")
48
49    add_custom_command(
50      OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.cc"
51             "${CMAKE_CURRENT_BINARY_DIR}/${FIL_WE}.pb.h"
52      COMMAND ${PROTOBUF_PROTOC_EXECUTABLE}
53      ARGS --cpp_out  ${CMAKE_CURRENT_BINARY_DIR} ${_protobuf_include_path} ${ABS_FIL}
54      DEPENDS ${ABS_FIL} ${PROTOBUF_PROTOC_EXECUTABLE}
55      COMMENT "Running C++ protocol buffer compiler on ${FIL}"
56      VERBATIM)
57  endforeach()
58
59  set_source_files_properties(${${SRCS}} ${${HDRS}} PROPERTIES GENERATED TRUE)
60  set(${SRCS} ${${SRCS}} PARENT_SCOPE)
61  set(${HDRS} ${${HDRS}} PARENT_SCOPE)
62endfunction()
63
64# Internal function: search for normal library as well as a debug one
65#    if the debug one is specified also include debug/optimized keywords
66#    in *_LIBRARIES variable
67function(_protobuf_find_libraries name filename)
68   get_target_property(${name}_LIBRARY lib${filename}
69     IMPORTED_LOCATION_RELEASE)
70   set(${name}_LIBRARY "${${name}_LIBRARY}" PARENT_SCOPE)
71   get_target_property(${name}_LIBRARY_DEBUG lib${filename}
72     IMPORTED_LOCATION_DEBUG)
73   set(${name}_LIBRARY_DEBUG "${${name}_LIBRARY_DEBUG}" PARENT_SCOPE)
74
75   if(NOT ${name}_LIBRARY_DEBUG)
76      # There is no debug library
77      set(${name}_LIBRARY_DEBUG ${${name}_LIBRARY} PARENT_SCOPE)
78      set(${name}_LIBRARIES     ${${name}_LIBRARY} PARENT_SCOPE)
79   else()
80      # There IS a debug library
81      set(${name}_LIBRARIES
82          optimized ${${name}_LIBRARY}
83          debug     ${${name}_LIBRARY_DEBUG}
84          PARENT_SCOPE
85      )
86   endif()
87endfunction()
88
89# Internal function: find threads library
90function(_protobuf_find_threads)
91    set(CMAKE_THREAD_PREFER_PTHREAD TRUE)
92    find_package(Threads)
93    if(Threads_FOUND)
94        list(APPEND PROTOBUF_LIBRARIES ${CMAKE_THREAD_LIBS_INIT})
95        set(PROTOBUF_LIBRARIES "${PROTOBUF_LIBRARIES}" PARENT_SCOPE)
96    endif()
97endfunction()
98
99#
100# Main.
101#
102
103# By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
104# for each directory where a proto file is referenced.
105if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
106  set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
107endif()
108
109# The Protobuf library
110_protobuf_find_libraries(PROTOBUF protobuf)
111
112# The Protobuf Lite library
113_protobuf_find_libraries(PROTOBUF_LITE protobuf-lite)
114
115# The Protobuf Protoc Library
116_protobuf_find_libraries(PROTOBUF_PROTOC protoc)
117
118if(UNIX)
119  _protobuf_find_threads()
120endif()
121
122# Set the include directory
123set(PROTOBUF_INCLUDE_DIR "${_PROTOBUF_IMPORT_PREFIX}/@CMAKE_INSTALL_INCLUDEDIR@")
124
125# Set the protoc Executable
126get_target_property(PROTOBUF_PROTOC_EXECUTABLE protoc
127  IMPORTED_LOCATION_RELEASE)
128if(NOT PROTOBUF_PROTOC_EXECUTABLE)
129  get_target_property(PROTOBUF_PROTOC_EXECUTABLE protoc
130    IMPORTED_LOCATION_DEBUG)
131endif()
132
133include(FindPackageHandleStandardArgs)
134FIND_PACKAGE_HANDLE_STANDARD_ARGS(PROTOBUF DEFAULT_MSG
135    PROTOBUF_LIBRARY PROTOBUF_INCLUDE_DIR)
136
137if(PROTOBUF_FOUND)
138    set(PROTOBUF_INCLUDE_DIRS ${PROTOBUF_INCLUDE_DIR})
139endif()
140