1# Minimum CMake required
2cmake_minimum_required(VERSION 2.8)
3
4# Project
5project(protobuf C CXX)
6
7# CMake policies
8cmake_policy(SET CMP0022 NEW)
9
10# Options
11option(protobuf_VERBOSE "Enable for verbose output" OFF)
12option(protobuf_BUILD_TESTS "Build tests" ON)
13if (BUILD_SHARED_LIBS)
14  set(protobuf_BUILD_SHARED_LIBS_DEFAULT ON)
15else (BUILD_SHARED_LIBS)
16  set(protobuf_BUILD_SHARED_LIBS_DEFAULT OFF)
17endif (BUILD_SHARED_LIBS)
18option(protobuf_BUILD_SHARED_LIBS "Build Shared Libraries" ${protobuf_BUILD_SHARED_LIBS_DEFAULT})
19option(protobuf_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON)
20if (MSVC)
21  set(protobuf_WITH_ZLIB_DEFAULT OFF)
22else (MSVC)
23  set(protobuf_WITH_ZLIB_DEFAULT ON)
24endif (MSVC)
25option(protobuf_WITH_ZLIB "Build with zlib support" ${protobuf_WITH_ZLIB_DEFAULT})
26set(protobuf_DEBUG_POSTFIX "d"
27  CACHE STRING "Default debug postfix")
28
29# Path to main configure script
30set(protobuf_CONFIGURE_SCRIPT "../configure.ac")
31
32# Parse configure script
33set(protobuf_AC_INIT_REGEX
34  "^AC_INIT\\(\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\]\\)$")
35file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_AC_INIT_LINE
36  LIMIT_COUNT 1 REGEX "^AC_INIT")
37# Description
38string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\1"
39    protobuf_DESCRIPTION    "${protobuf_AC_INIT_LINE}")
40# Version
41string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\2"
42    protobuf_VERSION_STRING "${protobuf_AC_INIT_LINE}")
43# Contact
44string(REGEX REPLACE        "${protobuf_AC_INIT_REGEX}" "\\3"
45    protobuf_CONTACT        "${protobuf_AC_INIT_LINE}")
46# Parse version tweaks
47set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$")
48string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\1"
49  protobuf_VERSION_MAJOR "${protobuf_VERSION_STRING}")
50string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\2"
51  protobuf_VERSION_MINOR "${protobuf_VERSION_STRING}")
52string(REGEX REPLACE     "${protobuf_VERSION_REGEX}" "\\3"
53  protobuf_VERSION_PATCH "${protobuf_VERSION_STRING}")
54# Package version
55set(protobuf_VERSION
56  "${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
57
58if(protobuf_VERBOSE)
59  message(STATUS "Configuration script parsing status [")
60  message(STATUS "  Description : ${protobuf_DESCRIPTION}")
61  message(STATUS "  Version     : ${protobuf_VERSION} (${protobuf_VERSION_STRING})")
62  message(STATUS "  Contact     : ${protobuf_CONTACT}")
63  message(STATUS "]")
64endif()
65
66add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD)
67
68find_package(Threads REQUIRED)
69if (CMAKE_USE_PTHREADS_INIT)
70  add_definitions(-DHAVE_PTHREAD)
71endif (CMAKE_USE_PTHREADS_INIT)
72
73if (protobuf_WITH_ZLIB)
74  find_package(ZLIB)
75  if (ZLIB_FOUND)
76    set(HAVE_ZLIB 1)
77    # FindZLIB module define ZLIB_INCLUDE_DIRS variable
78    # Set ZLIB_INCLUDE_DIRECTORIES for compatible
79    set(ZLIB_INCLUDE_DIRECTORIES ${ZLIB_INCLUDE_DIRECTORIES} ${ZLIB_INCLUDE_DIRS})
80    # Using imported target if exists
81    if (TARGET ZLIB::ZLIB)
82      set(ZLIB_LIBRARIES ZLIB::ZLIB)
83    endif (TARGET ZLIB::ZLIB)
84  else (ZLIB_FOUND)
85    set(HAVE_ZLIB 0)
86    # Explicitly set these to empty (override NOT_FOUND) so cmake doesn't
87    # complain when we use them later.
88    set(ZLIB_INCLUDE_DIRECTORIES)
89    set(ZLIB_LIBRARIES)
90  endif (ZLIB_FOUND)
91endif (protobuf_WITH_ZLIB)
92
93if (HAVE_ZLIB)
94  add_definitions(-DHAVE_ZLIB)
95endif (HAVE_ZLIB)
96
97if (protobuf_BUILD_SHARED_LIBS)
98  set(protobuf_SHARED_OR_STATIC "SHARED")
99else (protobuf_BUILD_SHARED_LIBS)
100  set(protobuf_SHARED_OR_STATIC "STATIC")
101  # In case we are building static libraries, link also the runtime library statically
102  # so that MSVCR*.DLL is not required at runtime.
103  # https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
104  # This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd
105  # http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
106  if (MSVC AND protobuf_MSVC_STATIC_RUNTIME)
107    foreach(flag_var
108        CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
109        CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
110      if(${flag_var} MATCHES "/MD")
111        string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
112      endif(${flag_var} MATCHES "/MD")
113    endforeach(flag_var)
114  endif (MSVC AND protobuf_MSVC_STATIC_RUNTIME)
115endif (protobuf_BUILD_SHARED_LIBS)
116
117if (MSVC)
118  # Build with multiple processes
119  add_definitions(/MP)
120  add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
121  # Allow big object
122  add_definitions(/bigobj)
123  string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR})
124  string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR})
125  configure_file(extract_includes.bat.in extract_includes.bat)
126endif (MSVC)
127
128get_filename_component(protobuf_source_dir ${protobuf_SOURCE_DIR} PATH)
129
130include_directories(
131  ${ZLIB_INCLUDE_DIRECTORIES}
132  ${protobuf_BINARY_DIR}
133  ${protobuf_source_dir}/src)
134
135if (MSVC)
136  # Add the "lib" prefix for generated .lib outputs.
137  set(LIB_PREFIX lib)
138else (MSVC)
139  # When building with "make", "lib" prefix will be added automatically by
140  # the build tool.
141  set(LIB_PREFIX)
142endif (MSVC)
143
144include(libprotobuf-lite.cmake)
145include(libprotobuf.cmake)
146include(libprotoc.cmake)
147include(protoc.cmake)
148
149if (protobuf_BUILD_TESTS)
150  include(tests.cmake)
151endif (protobuf_BUILD_TESTS)
152
153include(install.cmake)
154