# Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License

cmake_minimum_required(VERSION 3.0)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ldl -lpthread")
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
set(PROJ_ROOT ${CMAKE_CURRENT_SOURCE_DIR})
set(PROJ_BINARY_ROOT ${CMAKE_CURRENT_BINARY_DIR})

include(system)

project(paddle CXX C Go)

find_package(Sphinx)
if(NOT CMAKE_CROSSCOMPILING)
    find_package(CUDA QUIET)
endif(NOT CMAKE_CROSSCOMPILING)
find_package(Git REQUIRED)
find_package(Threads REQUIRED)
if(NOT ANDROID)
    find_package(Boost QUIET)
endif()

include(simd)

################################ Configurations #######################################
option(WITH_GPU         "Compile PaddlePaddle with NVIDIA GPU"          ${CUDA_FOUND})
option(WITH_AVX         "Compile PaddlePaddle with AVX intrinsics"      ${AVX_FOUND})
option(WITH_DSO         "Compile PaddlePaddle with dynamic linked CUDA" ON)
option(WITH_TESTING     "Compile PaddlePaddle with unit testing"        ON)
option(WITH_SWIG_PY     "Compile PaddlePaddle with inference api"       ON)
option(WITH_STYLE_CHECK "Compile PaddlePaddle with style check"         ON)
option(WITH_PYTHON      "Compile PaddlePaddle with python interpreter"  ON)
option(WITH_DOUBLE      "Compile PaddlePaddle with double precision"    OFF)
option(WITH_RDMA        "Compile PaddlePaddle with RDMA support"        OFF)
option(WITH_TIMER       "Compile PaddlePaddle with stats timer"         OFF)
option(WITH_PROFILER    "Compile PaddlePaddle with GPU profiler"        OFF)
option(WITH_DOC         "Compile PaddlePaddle with documentation"       OFF)
option(WITH_COVERAGE    "Compile PaddlePaddle with code coverage"       OFF)
option(COVERALLS_UPLOAD "Package code coverage data to coveralls"       OFF)
option(ON_TRAVIS        "Exclude special unit test on Travis CI"        OFF)
option(WITH_C_API       "Compile PaddlePaddle with C-API(Prediction)"   OFF)
option(WITH_GOLANG      "Compile PaddlePaddle with GOLANG"              OFF)
option(GLIDE_INSTALL    "Download and install go dependencies "         ON)
option(USE_NNPACK       "Compile PaddlePaddle with NNPACK library"      OFF)

# CMAKE_BUILD_TYPE
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING
      "Choose the type of build, options are: Debug Release RelWithDebInfo MinSizeRel"
      FORCE)
endif()

if(ANDROID)
    if(${CMAKE_SYSTEM_VERSION} VERSION_LESS "21")
        message(FATAL_ERROR "Unsupport standalone toolchains with Android API level lower than 21")
    endif()

    set(WITH_GPU OFF CACHE STRING
        "Disable GPU when cross-compiling for Android" FORCE)
    set(WITH_AVX OFF CACHE STRING
        "Disable AVX when cross-compiling for Android" FORCE)
    set(WITH_PYTHON OFF CACHE STRING
        "Disable PYTHON when cross-compiling for Android" FORCE)
    set(WITH_RDMA OFF CACHE STRING
        "Disable RDMA when cross-compiling for Android" FORCE)
endif(ANDROID)

set(THIRD_PARTY_PATH "${CMAKE_BINARY_DIR}/third_party" CACHE STRING
  "A path setting third party libraries download & build directories.")

if (WITH_C_API AND WITH_PYTHON)
  message(WARNING "It is suggest not embedded a python interpreter in Paddle "
    "when using C-API. It will give an unpredictable behavior when using a "
    "different Python interpreter from compiling.")
endif()

########################################################################################

include(external/zlib)      # download, build, install zlib
include(external/gflags)    # download, build, install gflags
include(external/glog)      # download, build, install glog
include(external/gtest)     # download, build, install gtest
include(external/protobuf)  # download, build, install protobuf
include(external/python)    # download, build, install python
include(external/openblas)  # download, build, install openblas
include(external/swig)      # download, build, install swig
include(external/warpctc)   # download, build, install warpctc
include(external/any)       # download libn::any
include(external/eigen)     # download eigen3
include(external/pybind11)    # download pybind11

include(cudnn)              # set cudnn libraries, must before configure
include(configure)          # add paddle env configuration
include(generic)            # simplify cmake module
include(package)            # set paddle packages
include(cpplint)            # set paddle c++ style
include(ccache)             # set ccache for compilation
include(util)               # set unittest and link libs
include(rdma)               # set rdma libraries
include(flags)              # set paddle compile flags
include(version)            # set PADDLE_VERSION
include(coveralls)          # set code coverage


include_directories("${PROJ_ROOT}")
include_directories("${PROJ_ROOT}/paddle/cuda/include")
include_directories("${CMAKE_CURRENT_BINARY_DIR}/proto")
include_directories("${CMAKE_CURRENT_BINARY_DIR}/go/pserver/client/c")
include_directories(${Boost_INCLUDE_DIRS})

set(EXTERNAL_LIBS
    ${GFLAGS_LIBRARIES}
    ${GLOG_LIBRARIES}
    ${CBLAS_LIBRARIES}
    ${PROTOBUF_LIBRARY}
    ${ZLIB_LIBRARIES}
    ${PYTHON_LIBRARIES}
)

if(WITH_GPU)
    list(APPEND EXTERNAL_LIB ${CUDA_LIBRARIES} ${CUDA_rt_LIBRARY})
    if(NOT WITH_DSO)
        list(APPEND EXTERNAL_LIB ${CUDNN_LIBRARY} ${CUDA_CUBLAS_LIBRARIES} ${CUDA_curand_LIBRARY})
    endif(NOT WITH_DSO)
endif(WITH_GPU)

if(USE_NNPACK)
    include(external/nnpack)
    list(APPEND EXTERNAL_LIBS ${NNPACK_LIBS})
endif(USE_NNPACK)

add_subdirectory(proto)

# "add_subdirectory(go)" should be placed after the following loine,
# because it depends on paddle/optimizer.
add_subdirectory(paddle/optimizer)

# "add_subdirectory(paddle)" and "add_subdirectory(python)" should be
# placed after this block, because they depends on it.
if(WITH_GOLANG)
    add_subdirectory(go)
endif(WITH_GOLANG)

add_subdirectory(paddle)
if(WITH_PYTHON)
  add_subdirectory(python)
endif()
if(WITH_DOC)
    add_subdirectory(doc)
endif()