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# Minimum CMake required
cmake_minimum_required(VERSION 2.8)
# Project
project(protobuf C CXX)
# Options
option(BUILD_TESTING "Build tests" ON)
option(BUILD_SHARED_LIBS "Build Shared Libraries" OFF)
if (MSVC)
option(ZLIB "Build with zlib support" OFF)
endif (MSVC)
# Path to main configure script
set(protobuf_CONFIGURE_SCRIPT "../configure.ac")
# Parse version from configure script
file(STRINGS "${protobuf_CONFIGURE_SCRIPT}" protobuf_VERSION_LINE
LIMIT_COUNT 1
REGEX "^AC_INIT")
# Replace special characters
string(REPLACE "(" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
string(REPLACE ")" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
string(REPLACE "[" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
string(REPLACE "]" "_" protobuf_VERSION_LINE ${protobuf_VERSION_LINE})
# Parse version string
string(REGEX REPLACE "^AC_INIT__Protocol Buffers_,_([^_]+).*$" "\\1"
protobuf_VERSION_STRING "${protobuf_VERSION_LINE}")
# Parse version tweaks
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\1"
protobuf_VERSION_MAJOR "${protobuf_VERSION_STRING}")
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\2"
protobuf_VERSION_MINOR "${protobuf_VERSION_STRING}")
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+).*$" "\\3"
protobuf_VERSION_PATCH "${protobuf_VERSION_STRING}")
# Package version
set(protobuf_VERSION
"${protobuf_VERSION_MAJOR}.${protobuf_VERSION_MINOR}.${protobuf_VERSION_PATCH}")
add_definitions(-DGOOGLE_PROTOBUF_CMAKE_BUILD)
find_package(Threads REQUIRED)
if (CMAKE_USE_PTHREADS_INIT)
add_definitions(-DHAVE_PTHREAD)
endif (CMAKE_USE_PTHREADS_INIT)
if (MSVC)
if (ZLIB)
set(HAVE_ZLIB 1)
find_path(ZLIB_INCLUDE_DIRECTORIES zlib.h ${protobuf_SOURCE_DIR})
find_library(ZLIB_LIBRARIES zdll ${protobuf_SOURCE_DIR})
else (ZLIB)
set(HAVE_ZLIB 0)
endif (ZLIB)
else (MSVC)
find_package(ZLIB)
if (ZLIB_FOUND)
set(HAVE_ZLIB 1)
else (ZLIB_FOUND)
set(HAVE_ZLIB 0)
# Explicitly set these to empty (override NOT_FOUND) so cmake doesn't
# complain when we use them later.
set(ZLIB_INCLUDE_DIRECTORIES)
set(ZLIB_LIBRARIES)
endif (ZLIB_FOUND)
endif (MSVC)
if (HAVE_ZLIB)
add_definitions(-DHAVE_ZLIB)
endif (HAVE_ZLIB)
if (MSVC)
if (BUILD_SHARED_LIBS)
add_definitions(-DPROTOBUF_USE_DLLS)
else (BUILD_SHARED_LIBS)
# In case we are building static libraries, link also the runtime library statically
# so that MSVCR*.DLL is not required at runtime.
# https://msdn.microsoft.com/en-us/library/2kzt1wy3.aspx
# This is achieved by replacing msvc option /MD with /MT and /MDd with /MTd
# http://www.cmake.org/Wiki/CMake_FAQ#How_can_I_build_my_MSVC_application_with_a_static_runtime.3F
foreach(flag_var
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
if(${flag_var} MATCHES "/MD")
string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
endif(${flag_var} MATCHES "/MD")
endforeach(flag_var)
endif (BUILD_SHARED_LIBS)
add_definitions(/wd4244 /wd4267 /wd4018 /wd4355 /wd4800 /wd4251 /wd4996 /wd4146 /wd4305)
endif (MSVC)
if (MSVC)
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)
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)
include(libprotobuf-lite.cmake)
include(libprotobuf.cmake)
include(libprotoc.cmake)
include(protoc.cmake)
if (BUILD_TESTING)
include(tests.cmake)
endif (BUILD_TESTING)
include(install.cmake)
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