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CMakeLists.txt
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CMakeLists.txt
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# Minimum CMake required. If available, accept the policy-controlled behavior up
# to 3.26.
cmake_minimum_required(VERSION 3.16...3.26)
# Revert to old behavior for MSVC debug symbols.
if(POLICY CMP0141)
cmake_policy(SET CMP0141 OLD)
endif()
if(protobuf_VERBOSE)
message(STATUS "Protocol Buffers Configuring...")
endif()
# 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()
# 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_BUILD_LIBUPB "Build libupb" ON)
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)
option(protobuf_FORCE_FETCH_DEPENDENCIES "Force all dependencies to be downloaded from GitHub. Local installations will be ignored." OFF)
option(protobuf_LOCAL_DEPENDENCIES_ONLY "Prevent downloading any dependencies from GitHub. If this option is set, the dependency must be available locally as an installed package." OFF)
# We support Unity (Jumbo) builds best-effort.
option(protobuf_USE_UNITY_BUILD "Enable Unity (Jumbo) build for" 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 GLOBAL)
add_executable(protobuf::protoc ALIAS protoc)
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 ${CMAKE_BINARY_DIR}/bin)
endif ()
endif ()
# Version metadata
set(protobuf_VERSION_STRING "5.30.0")
set(protobuf_DESCRIPTION "Protocol Buffers")
set(protobuf_CONTACT "[email protected]")
# Overrides for option dependencies
if (protobuf_BUILD_PROTOC_BINARIES OR protobuf_BUILD_TESTS)
set(protobuf_BUILD_LIBPROTOC ON)
endif ()
if (NOT protobuf_BUILD_PROTOBUF_BINARIES)
set(protobuf_INSTALL OFF)
endif()
# Parse version tweaks
set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+)([-]rc[-]|\\.)?([0-9]*)$")
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}")
if (protobuf_FORCE_FETCH_DEPENDENCIES AND protobuf_LOCAL_DEPENDENCIES_ONLY)
message(FATAL_ERROR "Conflicting options protobuf_FORCE_FETCH_DEPENDENCIES and protobuf_LOCAL_DEPENDENCIES_ONLY both set")
endif()
# Package version
set(protobuf_VERSION
"${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
if(protobuf_VERSION_PRERELEASE)
message(STATUS "${protobuf_VERSION_PRERELEASE}")
set(protobuf_VERSION "${protobuf_VERSION}.${protobuf_VERSION_PRERELEASE}")
else()
set(protobuf_VERSION "${protobuf_VERSION}.0")
endif()
message(STATUS "protobuf version: ${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()
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)
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)
# 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++17)
check_cxx_source_compiles("
#include <atomic>
int main() {
return static_cast<int>(std::atomic<int64_t>{});
}
" 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 ${OLD_CMAKE_REQUIRED_FLAGS})
endif (NOT MSVC)
if (protobuf_BUILD_SHARED_LIBS)
set(protobuf_SHARED_OR_STATIC "SHARED")
else (protobuf_BUILD_SHARED_LIBS)
set(protobuf_SHARED_OR_STATIC "STATIC")
set(ABSL_MSVC_STATIC_RUNTIME ON)
if (protobuf_MSVC_STATIC_RUNTIME)
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded$<$<CONFIG:Debug>:Debug>)
else()
set(CMAKE_MSVC_RUNTIME_LIBRARY MultiThreaded$<$<CONFIG:Debug>:Debug>DLL)
endif()
endif (protobuf_BUILD_SHARED_LIBS)
# Export all symbols on Windows when building shared libraries
SET(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
if (MSVC)
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.
foreach(v
CMAKE_C_FLAGS_DEBUG
CMAKE_CXX_FLAGS_DEBUG
CMAKE_C_FLAGS_RELWITHDEBINFO
CMAKE_CXX_FLAGS_RELWITHDEBINFO
)
string(REGEX REPLACE "[-/]Z[iI7]" "/DEBUG:NONE" ${v} "${${v}}")
endforeach()
endif()
# Suppress linker warnings about files with no symbols defined.
string(APPEND CMAKE_STATIC_LINKER_FLAGS " /ignore:4221")
# use English language (0x409) in resource compiler
string(APPEND CMAKE_RC_FLAGS " -l0x409")
# Generate the version.rc file used elsewhere.
configure_file(${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}
# Support #include-ing other top-level directories, i.e. upb_generator.
${protobuf_SOURCE_DIR}
${protobuf_BINARY_DIR}/src
${protobuf_SOURCE_DIR}/src)
if (protobuf_BUILD_TESTS)
include(${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(${protobuf_SOURCE_DIR}/cmake/libprotoc.cmake)
if (NOT DEFINED protobuf_LIB_PROTOC)
set(protobuf_LIB_PROTOC libprotoc)
endif ()
endif ()
if (protobuf_BUILD_LIBUPB)
include(${protobuf_SOURCE_DIR}/cmake/libupb.cmake)
if (NOT DEFINED protobuf_LIB_UPB)
set(protobuf_LIB_UPB libupb)
endif ()
include(${protobuf_SOURCE_DIR}/cmake/upb_generators.cmake)
endif ()
if (protobuf_BUILD_PROTOC_BINARIES)
include(${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)
set(protobuf_LIB_UPB protobuf::libupb)
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}")
message(STATUS "Using libupb : ${protobuf_LIB_UPB}")
endif(protobuf_VERBOSE)
endif ()
if (protobuf_BUILD_TESTS)
enable_testing()
include(${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)