# Minimum CMake required cmake_minimum_required(VERSION 3.10) if(protobuf_VERBOSE) message(STATUS "Protocol Buffers Configuring...") endif() # MSVC runtime library flags are selected by an abstraction. # New in CMake 3.15: https://cmake.org/cmake/help/latest/policy/CMP0091.html if(POLICY CMP0091) cmake_policy(SET CMP0091 NEW) endif() # option() honors normal variables # New in CMake 3.13: https://cmake.org/cmake/help/latest/policy/CMP0077.html if (POLICY CMP0077) cmake_policy(SET CMP0077 NEW) endif (POLICY CMP0077) # Project project(protobuf C CXX) if(protobuf_DEPRECATED_CMAKE_SUBDIRECTORY_USAGE) if(CMAKE_PROJECT_NAME STREQUAL "protobuf") get_filename_component(CMAKE_SOURCE_DIR ${CMAKE_SOURCE_DIR} DIRECTORY) endif() get_filename_component(CMAKE_CURRENT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR} DIRECTORY) get_filename_component(PROJECT_SOURCE_DIR ${PROJECT_SOURCE_DIR} DIRECTORY) get_filename_component(protobuf_SOURCE_DIR ${protobuf_SOURCE_DIR} DIRECTORY) endif() # The Intel compiler isn't able to deal with noinline member functions of # template classes defined in headers. As such it spams the output with # warning #2196: routine is both "inline" and "noinline" # This silences that warning. if (CMAKE_CXX_COMPILER_ID MATCHES Intel) string(APPEND CMAKE_CXX_FLAGS " -diag-disable=2196") endif() # Options option(protobuf_INSTALL "Install protobuf binaries and files" ON) option(protobuf_BUILD_TESTS "Build tests" ON) option(protobuf_BUILD_CONFORMANCE "Build conformance tests" OFF) option(protobuf_BUILD_EXAMPLES "Build examples" OFF) option(protobuf_BUILD_PROTOBUF_BINARIES "Build protobuf libraries and protoc compiler" ON) option(protobuf_BUILD_PROTOC_BINARIES "Build libprotoc and protoc compiler" ON) option(protobuf_BUILD_LIBPROTOC "Build libprotoc" OFF) option(protobuf_DISABLE_RTTI "Remove runtime type information in the binaries" OFF) option(protobuf_TEST_XML_OUTDIR "Output directory for XML logs from tests." "") option(protobuf_ALLOW_CCACHE "Adjust build flags to allow for ccache support." OFF) if (BUILD_SHARED_LIBS) set(protobuf_BUILD_SHARED_LIBS_DEFAULT ON) else (BUILD_SHARED_LIBS) set(protobuf_BUILD_SHARED_LIBS_DEFAULT OFF) endif (BUILD_SHARED_LIBS) option(protobuf_BUILD_SHARED_LIBS "Build Shared Libraries" ${protobuf_BUILD_SHARED_LIBS_DEFAULT}) include(CMakeDependentOption) cmake_dependent_option(protobuf_MSVC_STATIC_RUNTIME "Link static runtime libraries" ON "NOT protobuf_BUILD_SHARED_LIBS" OFF) set(protobuf_WITH_ZLIB_DEFAULT ON) option(protobuf_WITH_ZLIB "Build with zlib support" ${protobuf_WITH_ZLIB_DEFAULT}) set(protobuf_DEBUG_POSTFIX "d" CACHE STRING "Default debug postfix") mark_as_advanced(protobuf_DEBUG_POSTFIX) if(WITH_PROTOC) set(protobuf_PROTOC_EXE protoc) set(protobuf_BUILD_PROTOC_BINARIES OFF) add_executable(protoc IMPORTED) set_property(TARGET protoc PROPERTY IMPORTED_LOCATION ${WITH_PROTOC}) endif() # User options include(${protobuf_SOURCE_DIR}/cmake/protobuf-options.cmake) if (protobuf_BUILD_SHARED_LIBS) # This is necessary for linking in Abseil. set(CMAKE_POSITION_INDEPENDENT_CODE ON) # Build Abseil as shared libraries to avoid ODR violations. set(BUILD_SHARED_LIBS ON) # Output directory is correct by default for most build setups. However, when # building Protobuf as a DLL, it is important to have the DLL in the same # directory as the executable using it. Thus, we put all binaries in a single # /bin directory. if (MSVC) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) set(CMAKE_PDB_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) endif () endif () # Version metadata set(protobuf_VERSION_STRING "4.23.2") set(protobuf_DESCRIPTION "Protocol Buffers") set(protobuf_CONTACT "protobuf@googlegroups.com") # Overrides for option dependencies if (protobuf_BUILD_PROTOC_BINARIES OR protobuf_BUILD_TESTS) set(protobuf_BUILD_LIBPROTOC ON) endif () if (NOT protobuf_BUILD_PROTOBUF_BINARIES) set(protobuf_INSTALL OFF) endif() # Parse version tweaks set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+)([-]rc[-]|\\.)?([0-9]*)$") string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\1" protobuf_VERSION_MAJOR "${protobuf_VERSION_STRING}") string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\2" protobuf_VERSION_MINOR "${protobuf_VERSION_STRING}") string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\3" protobuf_VERSION_PATCH "${protobuf_VERSION_STRING}") string(REGEX REPLACE "${protobuf_VERSION_REGEX}" "\\5" protobuf_VERSION_PRERELEASE "${protobuf_VERSION_STRING}") message(STATUS "${protobuf_VERSION_PRERELEASE}") # Package version set(protobuf_VERSION "${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}") if(protobuf_VERSION_PRERELEASE) set(protobuf_VERSION "${protobuf_VERSION}.${protobuf_VERSION_PRERELEASE}") else() set(protobuf_VERSION "${protobuf_VERSION}.0") endif() message(STATUS "${protobuf_VERSION}") if(protobuf_VERBOSE) message(STATUS "Configuration script parsing status [") message(STATUS " Description : ${protobuf_DESCRIPTION}") message(STATUS " Version : ${protobuf_VERSION} (${protobuf_VERSION_STRING})") message(STATUS " Contact : ${protobuf_CONTACT}") message(STATUS "]") endif() add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD) if (protobuf_DISABLE_RTTI) add_definitions(-DGOOGLE_PROTOBUF_NO_RTTI=1) endif() file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/cmaketest.map "{ global: main; local: *; };") # CheckLinkerFlag module available in CMake >=3.18. if(${CMAKE_VERSION} VERSION_GREATER 3.18 OR ${CMAKE_VERSION} VERSION_EQUAL 3.18) include(CheckLinkerFlag) check_linker_flag(CXX -Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/cmaketest.map protobuf_HAVE_LD_VERSION_SCRIPT) else() include(CheckCXXSourceCompiles) set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/cmaketest.map) check_cxx_source_compiles(" int main() { return 0; } " protobuf_HAVE_LD_VERSION_SCRIPT) set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) endif() file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/cmaketest.map) find_package(Threads REQUIRED) # We can install dependencies from submodules if we're running # CMake v3.13 or newer. if(CMAKE_VERSION VERSION_LESS 3.13) set(_protobuf_INSTALL_SUPPORTED_FROM_MODULE OFF) else() set(_protobuf_INSTALL_SUPPORTED_FROM_MODULE ON) endif() set(_protobuf_FIND_ZLIB) if (protobuf_WITH_ZLIB) find_package(ZLIB) if (ZLIB_FOUND) set(HAVE_ZLIB 1) # FindZLIB module define ZLIB_INCLUDE_DIRS variable # Set ZLIB_INCLUDE_DIRECTORIES for compatible set(ZLIB_INCLUDE_DIRECTORIES ${ZLIB_INCLUDE_DIRECTORIES} ${ZLIB_INCLUDE_DIRS}) # Using imported target if exists if (TARGET ZLIB::ZLIB) set(ZLIB_LIBRARIES ZLIB::ZLIB) set(_protobuf_FIND_ZLIB "if(NOT ZLIB_FOUND)\n find_package(ZLIB)\nendif()") endif (TARGET ZLIB::ZLIB) else (ZLIB_FOUND) set(HAVE_ZLIB 0) # Explicitly set these to empty (override NOT_FOUND) so cmake doesn't # complain when we use them later. set(ZLIB_INCLUDE_DIRECTORIES) set(ZLIB_LIBRARIES) endif (ZLIB_FOUND) endif (protobuf_WITH_ZLIB) if (HAVE_ZLIB) add_definitions(-DHAVE_ZLIB) endif (HAVE_ZLIB) # We need to link with libatomic on systems that do not have builtin atomics, or # don't have builtin support for 8 byte atomics set(protobuf_LINK_LIBATOMIC false) if (NOT MSVC) include(CheckCXXSourceCompiles) set(OLD_CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS}) set(CMAKE_REQUIRED_FLAGS ${CMAKE_REQUIRED_FLAGS} -std=c++14) check_cxx_source_compiles(" #include int main() { return static_cast(std::atomic{}); } " protobuf_HAVE_BUILTIN_ATOMICS) if (NOT protobuf_HAVE_BUILTIN_ATOMICS) set(protobuf_LINK_LIBATOMIC true) endif (NOT protobuf_HAVE_BUILTIN_ATOMICS) set(CMAKE_REQUIRED_FLAGS ${OLD_CMAKE_REQUIRED_FLAGS}) endif (NOT MSVC) if (protobuf_BUILD_SHARED_LIBS) set(protobuf_SHARED_OR_STATIC "SHARED") else (protobuf_BUILD_SHARED_LIBS) set(protobuf_SHARED_OR_STATIC "STATIC") # The CMAKE__FLAGS(_)? is meant to be user controlled. # Prior to CMake 3.15, the MSVC runtime library was pushed into the same flags # making programmatic control difficult. Prefer the functionality in newer # CMake versions when available. if(${CMAKE_VERSION} VERSION_GREATER 3.15 OR ${CMAKE_VERSION} VERSION_EQUAL 3.15) if (protobuf_MSVC_STATIC_RUNTIME) set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded$<$:Debug>) else() set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded$<$:Debug>DLL) endif() else() # In case we are building static libraries, link also the runtime library statically # so that MSVCR*.DLL is not required at runtime. # https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx # This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd # http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F if (MSVC AND protobuf_MSVC_STATIC_RUNTIME) foreach(flag_var CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO) if(${flag_var} MATCHES "/MD") string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}") endif(${flag_var} MATCHES "/MD") endforeach(flag_var) endif (MSVC AND protobuf_MSVC_STATIC_RUNTIME) endif() endif (protobuf_BUILD_SHARED_LIBS) # Export all symbols on Windows when building shared libraries SET(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON) if (MSVC) if (CMAKE_CXX_COMPILER_ID STREQUAL "MSVC") # Build with multiple processes add_compile_options(/MP) endif() # Set source file and execution character sets to UTF-8 add_compile_options(/utf-8) # MSVC warning suppressions add_compile_options( /wd4065 # switch statement contains 'default' but no 'case' labels /wd4146 # unary minus operator applied to unsigned type /wd4244 # 'conversion' conversion from 'type1' to 'type2', possible loss of data /wd4251 # 'identifier' : class 'type' needs to have dll-interface to be used by clients of class 'type2' /wd4267 # 'var' : conversion from 'size_t' to 'type', possible loss of data /wd4305 # 'identifier' : truncation from 'type1' to 'type2' /wd4307 # 'operator' : integral constant overflow /wd4309 # 'conversion' : truncation of constant value /wd4334 # 'operator' : result of 32-bit shift implicitly converted to 64 bits (was 64-bit shift intended?) /wd4355 # 'this' : used in base member initializer list /wd4506 # no definition for inline function 'function' /wd4800 # 'type' : forcing value to bool 'true' or 'false' (performance warning) /wd4996 # The compiler encountered a deprecated declaration. ) # Allow big object add_compile_options(/bigobj) string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR}) string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR}) string(REPLACE "." "," protobuf_RC_FILEVERSION "${protobuf_VERSION}") if (protobuf_ALLOW_CCACHE) # In order to support ccache, we need to remove the /Zi option because it # puts debug symbols into separate pdb files (which in incompatible with # ccache). This can be replaced with /Z7 to preserve debug symbols, which # embeds debug symbols into the object files instead of creating a separate # pdb file, which isn't currently supported by ccache. However, this bloats # the ccache size by about a factor of 2x, making it very expensive in CI. # Instead, we strip debug symbols to reduce this overhead. string(REPLACE "/Zi" "/DEBUG:NONE" CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG}") string(REPLACE "/Zi" "/DEBUG:NONE" CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}") string(REPLACE "/Zi" "/DEBUG:NONE" CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_RELWITHDEBINFO}") string(REPLACE "/Zi" "/DEBUG:NONE" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}") endif() # Suppress linker warnings about files with no symbols defined. string(APPEND CMAKE_STATIC_LINKER_FLAGS " /ignore:4221") # use English language (0x409) in resource compiler string(APPEND CMAKE_RC_FLAGS " -l0x409") # Generate the version.rc file used elsewhere. configure_file(${protobuf_SOURCE_DIR}/cmake/version.rc.in ${CMAKE_CURRENT_BINARY_DIR}/version.rc @ONLY) set(protobuf_version_rc_file ${CMAKE_CURRENT_BINARY_DIR}/version.rc) # Add the "lib" prefix for generated .lib outputs. set(LIB_PREFIX lib) else (MSVC) # No version.rc file. set(protobuf_version_rc_file) # When building with "make", "lib" prefix will be added automatically by # the build tool. set(LIB_PREFIX) endif (MSVC) include_directories( ${ZLIB_INCLUDE_DIRECTORIES} ${protobuf_BINARY_DIR} ${protobuf_SOURCE_DIR}/src) if (protobuf_UNICODE) add_definitions(-DUNICODE -D_UNICODE) endif (protobuf_UNICODE) set(protobuf_ABSL_PROVIDER "module" CACHE STRING "Provider of absl library") set_property(CACHE protobuf_ABSL_PROVIDER PROPERTY STRINGS "module" "package") if (protobuf_BUILD_TESTS) include(${protobuf_SOURCE_DIR}/cmake/gtest.cmake) endif (protobuf_BUILD_TESTS) include(${protobuf_SOURCE_DIR}/cmake/abseil-cpp.cmake) if (protobuf_BUILD_PROTOBUF_BINARIES) include(${protobuf_SOURCE_DIR}/cmake/utf8_range.cmake) include(${protobuf_SOURCE_DIR}/cmake/libprotobuf-lite.cmake) if (NOT DEFINED protobuf_LIB_PROTOBUF_LITE) set(protobuf_LIB_PROTOBUF_LITE libprotobuf-lite) endif () include(${protobuf_SOURCE_DIR}/cmake/libprotobuf.cmake) if (NOT DEFINED protobuf_LIB_PROTOBUF) set(protobuf_LIB_PROTOBUF libprotobuf) endif () if (protobuf_BUILD_LIBPROTOC) include(${protobuf_SOURCE_DIR}/cmake/libprotoc.cmake) if (NOT DEFINED protobuf_LIB_PROTOC) set(protobuf_LIB_PROTOC libprotoc) endif () endif () if (protobuf_BUILD_PROTOC_BINARIES) include(${protobuf_SOURCE_DIR}/cmake/protoc.cmake) if (NOT DEFINED protobuf_PROTOC_EXE) set(protobuf_PROTOC_EXE protoc) endif () endif () else () find_package(Protobuf NO_MODULE) if (Protobuf_FOUND) set(protobuf_PROTOC_EXE protobuf::protoc) set(protobuf_LIB_PROTOC protobuf::libprotoc) set(protobuf_LIB_PROTOBUF protobuf::libprotobuf) set(protobuf_LIB_PROTOBUF_LITE protobuf::libprotobuf-lite) message(STATUS "CMake installation of Protobuf found.") endif () endif () # Ensure we have a protoc executable and protobuf libraries if we need one if (protobuf_BUILD_TESTS OR protobuf_BUILD_CONFORMANCE OR protobuf_BUILD_EXAMPLES) if (NOT DEFINED protobuf_PROTOC_EXE) find_program(protobuf_PROTOC_EXE protoc REQUIRED) message(STATUS "Found system ${protobuf_PROTOC_EXE}.") endif () if(protobuf_VERBOSE) message(STATUS "Using protoc : ${protobuf_PROTOC_EXE}") message(STATUS "Using libprotobuf : ${protobuf_LIB_PROTOBUF}") message(STATUS "Using libprotobuf-lite : ${protobuf_LIB_PROTOBUF_LITE}") message(STATUS "Using libprotoc : ${protobuf_LIB_PROTOC}") endif(protobuf_VERBOSE) endif () if (protobuf_BUILD_TESTS) enable_testing() include(${protobuf_SOURCE_DIR}/cmake/tests.cmake) endif (protobuf_BUILD_TESTS) if (protobuf_BUILD_CONFORMANCE) include(${protobuf_SOURCE_DIR}/cmake/conformance.cmake) endif (protobuf_BUILD_CONFORMANCE) if (protobuf_INSTALL) include(${protobuf_SOURCE_DIR}/cmake/install.cmake) endif (protobuf_INSTALL) if (protobuf_BUILD_EXAMPLES) include(${protobuf_SOURCE_DIR}/cmake/examples.cmake) endif (protobuf_BUILD_EXAMPLES) if(protobuf_VERBOSE) message(STATUS "Protocol Buffers Configuring done") endif(protobuf_VERBOSE)