<commit_before>cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)

project(Caffe2 CXX C)

# TODO(bwasti): versioning

# Useful functions.
function (exclude OUTPUT INPUT)
set(EXCLUDES ${ARGN})
foreach(EXCLUDE ${EXCLUDES})
        list(REMOVE_ITEM INPUT "${EXCLUDE}")
endforeach()
set(${OUTPUT} ${INPUT} PARENT_SCOPE)
endfunction(exclude)

function (prepend OUTPUT PREPEND)
set(OUT "")
foreach(ITEM ${ARGN})
        list(APPEND OUT "${PREPEND}${ITEM}")
endforeach()
set(${OUTPUT} ${OUT} PARENT_SCOPE)
endfunction(prepend)

# ---[ CMake scripts + modules
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)
set(CMAKE_MACOSX_RPATH 1)

enable_testing()

# options
option(USE_THREADS "Use Threads" ON)
option(USE_NERVANA_GPU "Use Nervana GPU backend" OFF)
option(USE_GLOG "Use GLOG" ON)
option(USE_GFLAGS "Use GFLAGS" ON)
option(USE_LMDB "Use LMDB" ON)
option(USE_LEVELDB "Use LMDB" ON)
option(USE_LITE_PROTO "Use lite protobuf instead of full." OFF)
option(USE_NCCL "Use NCCL" ON)
option(USE_NNPACK "Use NNPACK" ON)
option(USE_OPENCV "Use openCV" ON)
option(USE_CUDA "Use Cuda" ON)
option(USE_CNMEM "Use CNMEM" OFF)
option(USE_ZMQ "Use ZMQ" OFF)
option(USE_ROCKSDB "Use RocksDB" ON)
option(USE_REDIS "Use Redis" OFF)
option(USE_MPI "Use MPI" ON)
option(USE_GLOO "Use Gloo" ON)
option(USE_OBSERVERS "Use Observer Library" OFF)
option(BUILD_SHARED_LIBS "Build libcaffe2.so" ON)
option(USE_OPENMP "Use OpenMP for parallel code" ON)
option(BUILD_PYTHON "Build Python binaries" ON)
option(BUILD_BINARY "Build C++ binaries" ON)

# External projects
include(ExternalProject)

include(cmake/Utils.cmake)
include(cmake/Summary.cmake)

# options that do not affect the main binaries, but affects testing binaries
option(BUILD_TEST "Build C++ test binaries (need gtest and gbenchmark)" ON)

set(CAFFE2_CPU_FLAGS "" CACHE STRING "Flags to specify CPU features.")
set(CAFFE2_WHITELIST "" CACHE STRING "A whitelist file of files that one should build.")

# Set default build type
if(NOT CMAKE_BUILD_TYPE)
    message(STATUS "Build type not set - defaulting to Release")
    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build from: Debug Release RelWithDebInfo MinSizeRel Coverage." FORCE)
endif()

# ---[ Dependencies
include(cmake/Dependencies.cmake)

# ---[ Misc checks to cope with various compiler modes
include(cmake/MiscCheck.cmake)

# ---[ Whitelist file if whitelist is specified
include(cmake/Whitelist.cmake)

# ---[ Set link flag, handle additional deps for gcc 4.8 and above
if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.8.0 AND NOT ANDROID)
  message(STATUS "GCC ${CMAKE_CXX_COMPILER_VERSION}: Adding gcc and gcc_s libs to link line")
  list(APPEND Caffe2_DEPENDENCY_LIBS gcc_s gcc)
endif()

# ---[ Set output directories
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "binaries")

# ---[ Build flags
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11")
if(NOT MSVC)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -fPIC")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-narrowing")
else()
  foreach(flag_var
      CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE<commit_msg>Added O2 flag to default compilation path<commit_after>cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)

project(Caffe2 CXX C)

# TODO(bwasti): versioning

# Useful functions.
function (exclude OUTPUT INPUT)
set(EXCLUDES ${ARGN})
foreach(EXCLUDE ${EXCLUDES})
        list(REMOVE_ITEM INPUT "${EXCLUDE}")
endforeach()
set(${OUTPUT} ${INPUT} PARENT_SCOPE)
endfunction(exclude)

function (prepend OUTPUT PREPEND)
set(OUT "")
foreach(ITEM ${ARGN})
        list(APPEND OUT "${PREPEND}${ITEM}")
endforeach()
set(${OUTPUT} ${OUT} PARENT_SCOPE)
endfunction(prepend)

# ---[ CMake scripts + modules
list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/cmake/Modules)
set(CMAKE_MACOSX_RPATH 1)

enable_testing()

# options
option(USE_THREADS "Use Threads" ON)
option(USE_NERVANA_GPU "Use Nervana GPU backend" OFF)
option(USE_GLOG "Use GLOG" ON)
option(USE_GFLAGS "Use GFLAGS" ON)
option(USE_LMDB "Use LMDB" ON)
option(USE_LEVELDB "Use LMDB" ON)
option(USE_LITE_PROTO "Use lite protobuf instead of full." OFF)
option(USE_NCCL "Use NCCL" ON)
option(USE_NNPACK "Use NNPACK" ON)
option(USE_OPENCV "Use openCV" ON)
option(USE_CUDA "Use Cuda" ON)
option(USE_CNMEM "Use CNMEM" OFF)
option(USE_ZMQ "Use ZMQ" OFF)
option(USE_ROCKSDB "Use RocksDB" ON)
option(USE_REDIS "Use Redis" OFF)
option(USE_MPI "Use MPI" ON)
option(USE_GLOO "Use Gloo" ON)
option(USE_OBSERVERS "Use Observer Library" OFF)
option(BUILD_SHARED_LIBS "Build libcaffe2.so" ON)
option(USE_OPENMP "Use OpenMP for parallel code" ON)
option(BUILD_PYTHON "Build Python binaries" ON)
option(BUILD_BINARY "Build C++ binaries" ON)

# External projects
include(ExternalProject)

include(cmake/Utils.cmake)
include(cmake/Summary.cmake)

# options that do not affect the main binaries, but affects testing binaries
option(BUILD_TEST "Build C++ test binaries (need gtest and gbenchmark)" ON)

set(CAFFE2_CPU_FLAGS "" CACHE STRING "Flags to specify CPU features.")
set(CAFFE2_WHITELIST "" CACHE STRING "A whitelist file of files that one should build.")

# Set default build type
if(NOT CMAKE_BUILD_TYPE)
    message(STATUS "Build type not set - defaulting to Release")
    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build from: Debug Release RelWithDebInfo MinSizeRel Coverage." FORCE)
endif()

# ---[ Dependencies
include(cmake/Dependencies.cmake)

# ---[ Misc checks to cope with various compiler modes
include(cmake/MiscCheck.cmake)

# ---[ Whitelist file if whitelist is specified
include(cmake/Whitelist.cmake)

# ---[ Set link flag, handle additional deps for gcc 4.8 and above
if(CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER 4.8.0 AND NOT ANDROID)
  message(STATUS "GCC ${CMAKE_CXX_COMPILER_VERSION}: Adding gcc and gcc_s libs to link line")
  list(APPEND Caffe2_DEPENDENCY_LIBS gcc_s gcc)
endif()

# ---[ Set output directories
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "binaries")

# ---[ Build flags
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=c11")
if(NOT MSVC)
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -O2 -fPIC")
  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-narrowing")
else()
  foreach(flag_var
      CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
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