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# Minimum CMake required
cmake_minimum_required(VERSION 2.8.12)
if(protobuf_VERBOSE)
message(STATUS "Protocol Buffers Configuring...")
endif()
# CMake policies
cmake_policy(SET CMP0022 NEW)
if(POLICY CMP0048)
cmake_policy(SET CMP0048 NEW)
endif()
# Project
project(protobuf C CXX)
# Options
option(protobuf_BUILD_TESTS "Build tests" ON)
option(protobuf_BUILD_EXAMPLES "Build examples" OFF)
option(protobuf_BUILD_PROTOC_BINARIES "Build libprotoc and protoc compiler" ON)
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" ${protobuf_WITH_ZLIB_DEFAULT})
set(protobuf_DEBUG_POSTFIX "d"
CACHE STRING "Default debug postfix")
mark_as_advanced(protobuf_DEBUG_POSTFIX)
# User options
include(protobuf-options.cmake)
# Path to main configure script
set(protobuf_CONFIGURE_SCRIPT "../configure.ac")
# Parse configure script
set(protobuf_AC_INIT_REGEX
"^AC_INIT\\(\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\],\\[([^]]+)\\]\\)$")
file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_AC_INIT_LINE
LIMIT_COUNT 1 REGEX "^AC_INIT")
# Description
string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\1"
protobuf_DESCRIPTION "${protobuf_AC_INIT_LINE}")
# Version
string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\2"
protobuf_VERSION_STRING "${protobuf_AC_INIT_LINE}")
# Contact
string(REGEX REPLACE "${protobuf_AC_INIT_REGEX}" "\\3"
protobuf_CONTACT "${protobuf_AC_INIT_LINE}")
# Parse version tweaks
set(protobuf_VERSION_REGEX "^([0-9]+)\\.([0-9]+)\\.([0-9]+)-?(.*)$")
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 "${protobuf_VERSION_REGEX}" "\\4"
protobuf_VERSION_PRERELEASE "${protobuf_VERSION_STRING}")
# Package version
set(protobuf_VERSION
"${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
if(protobuf_VERSION_PRERELEASE)
set(protobuf_VERSION "${protobuf_VERSION}-${protobuf_VERSION_PRERELEASE}")
endif()
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)
find_package(Threads REQUIRED)
if (CMAKE_USE_PTHREADS_INIT)
add_definitions(-DHAVE_PTHREAD)
endif (CMAKE_USE_PTHREADS_INIT)
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} ${ZLIB_INCLUDE_DIRS})
# Using imported target if exists
if (TARGET ZLIB::ZLIB)
set(ZLIB_LIBRARIES ZLIB::ZLIB)
set(_protobuf_FIND_ZLIB "if(NOT ZLIB_FOUND)\n find_package(ZLIB)\nendif()")
endif (TARGET ZLIB::ZLIB)
else (ZLIB_FOUND)
set(HAVE_ZLIB 0)
# Explicitly set these to empty (override NOT_FOUND) so cmake doesn't
# complain when we use them later.
set(ZLIB_INCLUDE_DIRECTORIES)
set(ZLIB_LIBRARIES)
endif (ZLIB_FOUND)
endif (protobuf_WITH_ZLIB)
if (HAVE_ZLIB)
add_definitions(-DHAVE_ZLIB)
endif (HAVE_ZLIB)
if (protobuf_BUILD_SHARED_LIBS)
set(protobuf_SHARED_OR_STATIC "SHARED")
else (protobuf_BUILD_SHARED_LIBS)
set(protobuf_SHARED_OR_STATIC "STATIC")
# In case we are building static libraries, link also the runtime library statically
# so that MSVCR*.DLL is not required at runtime.
# https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
# This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd
# http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
if (MSVC AND protobuf_MSVC_STATIC_RUNTIME)
foreach(flag_var
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if(${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 (protobuf_BUILD_SHARED_LIBS)
if (MSVC)
# Build with multiple processes
add_definitions(/MP)
# MSVC warning suppressions
add_definitions(
/wd4018 # 'expression' : signed/unsigned mismatch
/wd4065 # switch statement contains 'default' but no 'case' labels
/wd4146 # unary minus operator applied to unsigned type, result still unsigned
/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_definitions(/bigobj)
string(REPLACE "/" "\\" PROTOBUF_SOURCE_WIN32_PATH ${protobuf_SOURCE_DIR})
string(REPLACE "/" "\\" PROTOBUF_BINARY_WIN32_PATH ${protobuf_BINARY_DIR})
configure_file(extract_includes.bat.in extract_includes.bat)
# Suppress linker warnings about files with no symbols defined.
set(CMAKE_STATIC_LINKER_FLAGS /ignore:4221)
endif (MSVC)
get_filename_component(protobuf_source_dir ${protobuf_SOURCE_DIR} PATH)
include_directories(
${ZLIB_INCLUDE_DIRECTORIES}
${protobuf_BINARY_DIR}
${protobuf_source_dir}/src)
if (MSVC)
# Add the "lib" prefix for generated .lib outputs.
set(LIB_PREFIX lib)
else (MSVC)
# When building with "make", "lib" prefix will be added automatically by
# the build tool.
set(LIB_PREFIX)
endif (MSVC)
if (protobuf_UNICODE)
add_definitions(-DUNICODE -D_UNICODE)
endif (protobuf_UNICODE)
include(libprotobuf-lite.cmake)
include(libprotobuf.cmake)
if (protobuf_BUILD_PROTOC_BINARIES)
include(libprotoc.cmake)
include(protoc.cmake)
endif (protobuf_BUILD_PROTOC_BINARIES)
if (protobuf_BUILD_TESTS)
include(tests.cmake)
endif (protobuf_BUILD_TESTS)
include(install.cmake)
if (protobuf_BUILD_EXAMPLES)
include(examples.cmake)
endif (protobuf_BUILD_EXAMPLES)
if(protobuf_VERBOSE)
message(STATUS "Protocol Buffers Configuring done")
endif()
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