1# Minimum CMake required 2cmake_minimum_required(VERSION 3.1.3) 3 4if(protobuf_VERBOSE) 5 message(STATUS "Protocol Buffers Configuring...") 6endif() 7 8# CMake policies 9cmake_policy(SET CMP0022 NEW) 10# On MacOS use @rpath/ for target's install name prefix path 11if (POLICY CMP0042) 12 cmake_policy(SET CMP0042 NEW) 13endif () 14# Clear VERSION variables when no VERSION is given to project() 15if(POLICY CMP0048) 16 cmake_policy(SET CMP0048 NEW) 17endif() 18 19# Project 20project(protobuf C CXX) 21 22# Add c++11 flags 23if (CYGWIN) 24 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11") 25else() 26 set(CMAKE_CXX_STANDARD 11) 27 set(CMAKE_CXX_STANDARD_REQUIRED ON) 28 set(CMAKE_CXX_EXTENSIONS OFF) 29endif() 30 31# The Intel compiler isn't able to deal with noinline member functions of 32# template classes defined in headers. As such it spams the output with 33# warning #2196: routine is both "inline" and "noinline" 34# This silences that warning. 35if (CMAKE_CXX_COMPILER_ID MATCHES Intel) 36 string(APPEND CMAKE_CXX_FLAGS " -diag-disable=2196") 37endif() 38 39# Options 40if(WITH_PROTOC) 41 set(protobuf_PROTOC_EXE ${WITH_PROTOC} CACHE FILEPATH "Protocol Buffer Compiler executable" FORCE) 42endif() 43option(protobuf_BUILD_TESTS "Build tests" ON) 44option(protobuf_BUILD_CONFORMANCE "Build conformance tests" OFF) 45option(protobuf_BUILD_EXAMPLES "Build examples" OFF) 46option(protobuf_BUILD_PROTOC_BINARIES "Build libprotoc and protoc compiler" ON) 47option(protobuf_BUILD_LIBPROTOC "Build libprotoc" OFF) 48if (BUILD_SHARED_LIBS) 49 set(protobuf_BUILD_SHARED_LIBS_DEFAULT ON) 50else (BUILD_SHARED_LIBS) 51 set(protobuf_BUILD_SHARED_LIBS_DEFAULT OFF) 52endif (BUILD_SHARED_LIBS) 53option(protobuf_BUILD_SHARED_LIBS "Build Shared Libraries" ${protobuf_BUILD_SHARED_LIBS_DEFAULT}) 54include(CMakeDependentOption) 55cmake_dependent_option(protobuf_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON 56 "NOT protobuf_BUILD_SHARED_LIBS" OFF) 57set(protobuf_WITH_ZLIB_DEFAULT ON) 58option(protobuf_WITH_ZLIB "Build with zlib support" ${protobuf_WITH_ZLIB_DEFAULT}) 59set(protobuf_DEBUG_POSTFIX "d" 60 CACHE STRING "Default debug postfix") 61mark_as_advanced(protobuf_DEBUG_POSTFIX) 62# User options 63include(protobuf-options.cmake) 64 65# Overrides for option dependencies 66if (protobuf_BUILD_PROTOC_BINARIES OR protobuf_BUILD_TESTS) 67 set(protobuf_BUILD_LIBPROTOC ON) 68endif () 69# Path to main configure script 70set(protobuf_CONFIGURE_SCRIPT "../configure.ac") 71 72# Parse configure script 73set(protobuf_AC_INIT_REGEX 74 "^AC_INIT\\(\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\]\\)$") 75file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_AC_INIT_LINE 76 LIMIT_COUNT 1 REGEX "^AC_INIT") 77# Description 78string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\1" 79 protobuf_DESCRIPTION "${protobuf_AC_INIT_LINE}") 80# Version 81string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\2" 82 protobuf_VERSION_STRING "${protobuf_AC_INIT_LINE}") 83# Contact 84string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\3" 85 protobuf_CONTACT "${protobuf_AC_INIT_LINE}") 86# Parse version tweaks 87set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+)([-]rc[-]|\\.)?([0-9]*)$") 88string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\1" 89 protobuf_VERSION_MAJOR "${protobuf_VERSION_STRING}") 90string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\2" 91 protobuf_VERSION_MINOR "${protobuf_VERSION_STRING}") 92string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\3" 93 protobuf_VERSION_PATCH "${protobuf_VERSION_STRING}") 94string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\5" 95 protobuf_VERSION_PRERELEASE "${protobuf_VERSION_STRING}") 96 97message(STATUS "${protobuf_VERSION_PRERELEASE}") 98 99# Package version 100set(protobuf_VERSION 101 "${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}") 102 103if(protobuf_VERSION_PRERELEASE) 104 set(protobuf_VERSION "${protobuf_VERSION}.${protobuf_VERSION_PRERELEASE}") 105else() 106 set(protobuf_VERSION "${protobuf_VERSION}.0") 107endif() 108message(STATUS "${protobuf_VERSION}") 109 110if(protobuf_VERBOSE) 111 message(STATUS "Configuration script parsing status [") 112 message(STATUS " Description : ${protobuf_DESCRIPTION}") 113 message(STATUS " Version : ${protobuf_VERSION} (${protobuf_VERSION_STRING})") 114 message(STATUS " Contact : ${protobuf_CONTACT}") 115 message(STATUS "]") 116endif() 117 118add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD) 119 120find_package(Threads REQUIRED) 121if (CMAKE_USE_PTHREADS_INIT) 122 add_definitions(-DHAVE_PTHREAD) 123endif (CMAKE_USE_PTHREADS_INIT) 124 125set(_protobuf_FIND_ZLIB) 126if (protobuf_WITH_ZLIB) 127 find_package(ZLIB) 128 if (ZLIB_FOUND) 129 set(HAVE_ZLIB 1) 130 # FindZLIB module define ZLIB_INCLUDE_DIRS variable 131 # Set ZLIB_INCLUDE_DIRECTORIES for compatible 132 set(ZLIB_INCLUDE_DIRECTORIES ${ZLIB_INCLUDE_DIRECTORIES} ${ZLIB_INCLUDE_DIRS}) 133 # Using imported target if exists 134 if (TARGET ZLIB::ZLIB) 135 set(ZLIB_LIBRARIES ZLIB::ZLIB) 136 set(_protobuf_FIND_ZLIB "if(NOT ZLIB_FOUND)\n find_package(ZLIB)\nendif()") 137 endif (TARGET ZLIB::ZLIB) 138 else (ZLIB_FOUND) 139 set(HAVE_ZLIB 0) 140 # Explicitly set these to empty (override NOT_FOUND) so cmake doesn't 141 # complain when we use them later. 142 set(ZLIB_INCLUDE_DIRECTORIES) 143 set(ZLIB_LIBRARIES) 144 endif (ZLIB_FOUND) 145endif (protobuf_WITH_ZLIB) 146 147if (HAVE_ZLIB) 148 add_definitions(-DHAVE_ZLIB) 149endif (HAVE_ZLIB) 150 151# We need to link with libatomic on systems that do not have builtin atomics, or 152# don't have builtin support for 8 byte atomics 153set(protobuf_LINK_LIBATOMIC false) 154if (NOT MSVC) 155 include(CheckCXXSourceCompiles) 156 set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) 157 set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -std=c++11) 158 check_cxx_source_compiles(" 159 #include <atomic> 160 int main() { 161 return std::atomic<int64_t>{}; 162 } 163 " protobuf_HAVE_BUILTIN_ATOMICS) 164 if (NOT protobuf_HAVE_BUILTIN_ATOMICS) 165 set(protobuf_LINK_LIBATOMIC true) 166 endif (NOT protobuf_HAVE_BUILTIN_ATOMICS) 167 set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) 168endif (NOT MSVC) 169 170if (protobuf_BUILD_SHARED_LIBS) 171 set(protobuf_SHARED_OR_STATIC "SHARED") 172else (protobuf_BUILD_SHARED_LIBS) 173 set(protobuf_SHARED_OR_STATIC "STATIC") 174 # In case we are building static libraries, link also the runtime library statically 175 # so that MSVCR*.DLL is not required at runtime. 176 # https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx 177 # This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd 178 # http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F 179 if (MSVC AND protobuf_MSVC_STATIC_RUNTIME) 180 foreach(flag_var 181 CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE 182 CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO) 183 if(${flag_var} MATCHES "/MD") 184 string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}") 185 endif(${flag_var} MATCHES "/MD") 186 endforeach(flag_var) 187 endif (MSVC AND protobuf_MSVC_STATIC_RUNTIME) 188endif (protobuf_BUILD_SHARED_LIBS) 189 190if (MSVC) 191 # Build with multiple processes 192 add_definitions(/MP) 193 # MSVC warning suppressions 194 add_definitions( 195 /wd4018 # 'expression' : signed/unsigned mismatch 196 /wd4065 # switch statement contains 'default' but no 'case' labels 197 /wd4146 # unary minus operator applied to unsigned type, result still unsigned 198 /wd4244 # 'conversion' conversion from 'type1' to 'type2', possible loss of data 199 /wd4251 # 'identifier' : class 'type' needs to have dll-interface to be used by clients of class 'type2' 200 /wd4267 # 'var' : conversion from 'size_t' to 'type', possible loss of data 201 /wd4305 # 'identifier' : truncation from 'type1' to 'type2' 202 /wd4307 # 'operator' : integral constant overflow 203 /wd4309 # 'conversion' : truncation of constant value 204 /wd4334 # 'operator' : result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?) 205 /wd4355 # 'this' : used in base member initializer list 206 /wd4506 # no definition for inline function 'function' 207 /wd4800 # 'type' : forcing value to bool 'true' or 'false' (performance warning) 208 /wd4996 # The compiler encountered a deprecated declaration. 209 ) 210 # Allow big object 211 add_definitions(/bigobj) 212 string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR}) 213 string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR}) 214 string(REPLACE "." "," protobuf_RC_FILEVERSION "${protobuf_VERSION}") 215 configure_file(extract_includes.bat.in extract_includes.bat) 216 217 # Suppress linker warnings about files with no symbols defined. 218 set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /ignore:4221") 219 220 # Configure Resource Compiler 221 enable_language(RC) 222 # use English language (0x409) in resource compiler 223 set(rc_flags "/l0x409") 224 # fix rc.exe invocations because of usage of add_definitions() 225 set(CMAKE_RC_COMPILE_OBJECT "<CMAKE_RC_COMPILER> ${rc_flags} <DEFINES> /fo<OBJECT> <SOURCE>") 226 227 configure_file(version.rc.in ${CMAKE_CURRENT_BINARY_DIR}/version.rc @ONLY) 228endif (MSVC) 229 230 231get_filename_component(protobuf_source_dir ${protobuf_SOURCE_DIR} PATH) 232 233include_directories( 234 ${ZLIB_INCLUDE_DIRECTORIES} 235 ${protobuf_BINARY_DIR} 236 ${protobuf_source_dir}/src) 237 238if (MSVC) 239 # Add the "lib" prefix for generated .lib outputs. 240 set(LIB_PREFIX lib) 241else (MSVC) 242 # When building with "make", "lib" prefix will be added automatically by 243 # the build tool. 244 set(LIB_PREFIX) 245endif (MSVC) 246 247if (protobuf_UNICODE) 248 add_definitions(-DUNICODE -D_UNICODE) 249endif (protobuf_UNICODE) 250 251include(libprotobuf-lite.cmake) 252include(libprotobuf.cmake) 253if (protobuf_BUILD_LIBPROTOC) 254 include(libprotoc.cmake) 255endif (protobuf_BUILD_LIBPROTOC) 256if (protobuf_BUILD_PROTOC_BINARIES) 257 include(protoc.cmake) 258 if (NOT DEFINED protobuf_PROTOC_EXE) 259 set(protobuf_PROTOC_EXE protoc) 260 endif (NOT DEFINED protobuf_PROTOC_EXE) 261endif (protobuf_BUILD_PROTOC_BINARIES) 262 263# Ensure we have a protoc executable if we need one 264if (protobuf_BUILD_TESTS OR protobuf_BUILD_CONFORMANCE OR protobuf_BUILD_EXAMPLES) 265 if (NOT DEFINED protobuf_PROTOC_EXE) 266 find_program(protobuf_PROTOC_EXE protoc) 267 if (NOT protobuf_PROTOC_EXE) 268 message(FATAL "Build requires 'protoc' but binary not found and not building protoc.") 269 endif () 270 endif () 271 if(protobuf_VERBOSE) 272 message(STATUS "Using protoc : ${protobuf_PROTOC_EXE}") 273 endif(protobuf_VERBOSE) 274endif () 275 276if (protobuf_BUILD_TESTS) 277 include(tests.cmake) 278endif (protobuf_BUILD_TESTS) 279 280if (protobuf_BUILD_CONFORMANCE) 281 include(conformance.cmake) 282endif (protobuf_BUILD_CONFORMANCE) 283 284include(install.cmake) 285 286if (protobuf_BUILD_EXAMPLES) 287 include(examples.cmake) 288endif (protobuf_BUILD_EXAMPLES) 289 290if(protobuf_VERBOSE) 291 message(STATUS "Protocol Buffers Configuring done") 292endif(protobuf_VERBOSE) 293