option(BUILD_CAFFE_PARSER "Build Caffe parser" OFF)
option(BUILD_TF_PARSER "Build Tensorflow parser" OFF)
option(BUILD_ONNX_PARSER "Build Onnx parser" OFF)
option(BUILD_UNIT_TESTS "Build unit tests" ON)
option(BUILD_TESTS "Build test applications" OFF)
option(BUILD_FOR_COVERAGE "Use no optimization and output .gcno and .gcda files" OFF)
option(ARMCOMPUTENEON "Build with ARM Compute NEON support" OFF)
option(ARMCOMPUTECL "Build with ARM Compute OpenCL support" OFF)
option(PROFILING_BACKEND_STREAMLINE "Forward the armNN profiling events to DS-5/Streamline as annotations" OFF)
# options used for heap profiling and leak checking
option(HEAP_PROFILING "Build with heap profiling enabled" OFF)
option(LEAK_CHECKING "Build with leak checking enabled" OFF)
option(GPERFTOOLS_ROOT "Location where the gperftools 'include' and 'lib' folders to be found" Off)
# options used for tensorflow lite support
option(BUILD_TF_LITE_PARSER "Build Tensorflow Lite parser" OFF)
option(TF_LITE_GENERATED_PATH "Tensorflow lite generated C++ schema location" OFF)
option(FLATBUFFERS_ROOT "Location where the flatbuffers 'include' and 'lib' folders to be found" Off)

include(SelectLibraryConfigurations)

set(COMPILER_IS_GNU_LIKE 0)
if(${CMAKE_CXX_COMPILER_ID} STREQUAL GNU OR ${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
    set(COMPILER_IS_GNU_LIKE 1)
endif()

# Enable CCache if available and not disabled
option(USE_CCACHE "USE_CCACHE" ON)
find_program(CCACHE_FOUND ccache)
if(CCACHE_FOUND AND USE_CCACHE)
    get_property(rule_launch_compile DIRECTORY PROPERTY RULE_LAUNCH_COMPILE)
    set_property(DIRECTORY PROPERTY RULE_LAUNCH_COMPILE "CCACHE_CPP2=yes ${rule_launch_compile} ccache")
endif()

# Enable distcc if available and not disabled
option(USE_DISTCC "USE_DISTCC" OFF)
find_program(DISTCC_FOUND distcc)
if(DISTCC_FOUND AND USE_DISTCC)
    get_property(rule_launch_compile DIRECTORY PROPERTY RULE_LAUNCH_COMPILE)
    set_property(DIRECTORY PROPERTY RULE_LAUNCH_COMPILE "${rule_launch_compile} distcc")
endif()

# Set to release configuration by default
if(NOT CMAKE_BUILD_TYPE)
    set(CMAKE_BUILD_TYPE "Release")
endif()

# Compiler flags that are always set
set(CMAKE_POSITION_INDEPENDENT_CODE ON)
if(COMPILER_IS_GNU_LIKE)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall -Werror -Wold-style-cast -Wno-missing-braces -Wconversion -Wsign-conversion")
elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /EHsc /MP")
    add_definitions(-DNOMINMAX=1 -DNO_STRICT=1)
endif()
if("${CMAKE_SYSTEM_NAME}" STREQUAL Android)
    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -llog")
    set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -llog")
endif()

# Compiler flags for Release builds
set(CMAKE_CXX_FLAGS_RELEASE "-DNDEBUG")
if(COMPILER_IS_GNU_LIKE)
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3")
elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /MD /O2")
endif()

# Compiler flags for Debug builds
if(COMPILER_IS_GNU_LIKE)
    set(CMAKE_CXX_FLAGS_DEBUG "-g")
elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
    set(CMAKE_CXX_FLAGS_DEBUG "/MDd /ZI /Od")
    # Disable SAFESEH which is necessary for Edit and Continue to work
    set(CMAKE_EXE_LINKER_FLAGS_DEBUG  "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /SAFESEH:NO")
    set(CMAKE_SHARED_LINKER_FLAGS_DEBUG  "${CMAKE_EXE_LINKER_FLAGS_DEBUG} /SAFESEH:NO")
endif()

# Modify RelWithDebInfo so that NDEBUG isn't defined.
# This enables asserts.
if (COMPILER_IS_GNU_LIKE)
    string(REPLACE "-DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
elseif (${CMAKE_CXX_COMPILER_ID} STREQUAL MSVC)
    string(REPLACE "/DNDEBUG" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
endif()

# Compiler flags for code coverage measurements
if(BUILD_FOR_COVERAGE)
    if(NOT CMAKE_BUILD_TYPE EQUAL "Debug")
        message(WARNING "BUILD_FOR_COVERAGE set so forcing to Debug build")
        set(CMAKE_BUILD_TYPE "Debug")
    endif()

    set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} --coverage")
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --coverage")
endif()

if(BUILD_FOR_COVERAGE AND NOT BUILD_UNIT_TESTS)
    message(WARNING "BUILD_FOR_COVERAGE set but not BUILD_UNIT_TESTS, so code coverage will not be able to run")
endif()

set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules ${CMAKE_MODULE_PATH})

# Boost
add_definitions("-DBOOST_ALL_NO_LIB") # Turn off auto-linking as we specify the libs manually
set(Boost_USE_STATIC_LIBS ON)
find_package(Boost 1.59 REQUIRED COMPONENTS unit_test_framework system filesystem log program_options)
include_directories(SYSTEM "${Boost_INCLUDE_DIR}")
link_directories(${Boost_LIBRARY_DIR})

# pthread
find_package (Threads)

# Favour the protobuf passed on command line
if(BUILD_TF_PARSER OR BUILD_CAFFE_PARSER OR BUILD_ONNX_PARSER)
    find_library(PROTOBUF_LIBRARY_DEBUG NAMES "protobufd"
        PATHS ${PROTOBUF_ROOT}/lib
        NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
    find_library(PROTOBUF_LIBRARY_DEBUG NAMES "protobufd")

    find_library(PROTOBUF_LIBRARY_RELEASE NAMES "protobuf"
        PATHS ${PROTOBUF_ROOT}/lib
        NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
    find_library(PROTOBUF_LIBRARY_RELEASE NAMES "protobuf")

    select_library_configurations(PROTOBUF)

    find_path(PROTOBUF_INCLUDE_DIRS "google/protobuf/message.h"
              PATHS ${PROTOBUF_ROOT}/include
              NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
    find_path(PROTOBUF_INCLUDE_DIRS "google/protobuf/message.h")

    include_directories(SYSTEM "${PROTOBUF_INCLUDE_DIRS}")
    add_definitions(-DPROTOBUF_USE_DLLS)
endif()

# Caffe and its dependencies
if(BUILD_CAFFE_PARSER)
    add_definitions(-DARMNN_CAFFE_PARSER)

    find_path(CAFFE_GENERATED_SOURCES "caffe/proto/caffe.pb.h"
        HINTS ${CAFFE_BUILD_ROOT}/include)
    include_directories(SYSTEM "${CAFFE_GENERATED_SOURCES}")
endif()

if(BUILD_TF_PARSER)
    add_definitions(-DARMNN_TF_PARSER)

    find_path(TF_GENERATED_SOURCES "tensorflow/core/protobuf/saved_model.pb.cc")

    # C++ sources generated for tf protobufs
    file(GLOB_RECURSE TF_PROTOBUFS "${TF_GENERATED_SOURCES}/*.pb.cc")

    # C++ headers generated for tf protobufs
    include_directories(SYSTEM "${TF_GENERATED_SOURCES}")
endif()

if(BUILD_ONNX_PARSER)
    add_definitions(-DARMNN_ONNX_PARSER)

    find_path(ONNX_GENERATED_SOURCES "onnx/onnx.pb.cc")

    # C++ headers generated for onnx protobufs
    include_directories(SYSTEM "${ONNX_GENERATED_SOURCES}")
endif()


# Flatbuffers support for TF Lite
if(BUILD_TF_LITE_PARSER)
    find_path(TF_LITE_SCHEMA_INCLUDE_PATH
              schema_generated.h
              HINTS ${TF_LITE_GENERATED_PATH})

    if(NOT TF_LITE_SCHEMA_INCLUDE_PATH)
        message(WARNING
          "Couldn't find 'schema_generated.h' at ${TF_LITE_GENERATED_PATH}. Disabling Tf Lite support")
        set(BUILD_TF_LITE_PARSER Off)
    else()
        message(STATUS "Tf Lite generated header found at: ${TF_LITE_SCHEMA_INCLUDE_PATH}")
    endif()

    # verify we have a valid flatbuffers include path
    find_path(FLATBUFFERS_INCLUDE_PATH flatbuffers/flatbuffers.h
              HINTS ${FLATBUFFERS_ROOT}/include /usr/local/include /usr/include)

    if(NOT FLATBUFFERS_INCLUDE_PATH)
        message(WARNING
          "Couldn't find 'flatbuffers/flatbuffers.h' at ${FLATBUFFERS_ROOT}/include. Disabling Tf Lite support")
        set(BUILD_TF_LITE_PARSER Off)
    else()
        message(STATUS "Flatbuffers headers are located at: ${FLATBUFFERS_INCLUDE_PATH}")
    endif()

    find_library(FLATBUFFERS_LIBRARY
                 NAMES libflatbuffers.a flatbuffers
                 HINTS ${FLATBUFFERS_ROOT}/lib /usr/local/lib /usr/lib)

    if(NOT FLATBUFFERS_LIBRARY)
        message(WARNING
          "Couldn't find flatbuffers library. Disabling Tf Lite support")
        set(BUILD_TF_LITE_PARSER Off)
    else()
        message(STATUS "Flatbuffers library located at: ${FLATBUFFERS_LIBRARY}")
    endif()

    # Setup includes and libs only if we still want Tf Lite
    if(BUILD_TF_LITE_PARSER)
        include_directories(SYSTEM "${TF_LITE_SCHEMA_INCLUDE_PATH}")
        include_directories(SYSTEM "${FLATBUFFERS_INCLUDE_PATH}")
        add_definitions(-DARMNN_TF_LITE_PARSER)
        add_definitions(-DARMNN_TF_LITE_SCHEMA_PATH="${TF_LITE_SCHEMA_INCLUDE_PATH}/schema.fbs")
    endif()
endif()

include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)

# ARM Compute
# Note that ARM Compute has a different folder layout depending on the branch but also on
# whether it comes from a prepackaged archive (this is why we add several hints below)
if(ARMCOMPUTENEON OR ARMCOMPUTECL)
    find_path(ARMCOMPUTE_INCLUDE arm_compute/core/CL/ICLKernel.h
              PATHS ${ARMCOMPUTE_ROOT}/include
              PATHS ${ARMCOMPUTE_ROOT}/applications/arm_compute
              PATHS ${ARMCOMPUTE_ROOT}
              NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
    find_path(ARMCOMPUTE_INCLUDE arm_compute/core/CL/ICLKernel.h)
    include_directories(SYSTEM "${ARMCOMPUTE_INCLUDE}")

    # Find the Arm Compute libraries if not already specified (the user may have already defined this in advance,
    # e.g. if building clframework as a dependent cmake project)
    if (NOT DEFINED ARMCOMPUTE_LIBRARIES)
        # We link to the static variant so that customers don't need to find and build a compatible version of clframework.
        # First try the folders specified ARMCOMPUTE_BUILD_DIR (with PATH_SUFFIXES for
        # Windows builds)
        find_library(ARMCOMPUTE_LIBRARY_DEBUG NAMES arm_compute-static
                     PATHS ${ARMCOMPUTE_BUILD_DIR}
                     PATH_SUFFIXES "Debug"
                     NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
        find_library(ARMCOMPUTE_LIBRARY_RELEASE NAMES arm_compute-static
                     PATHS ${ARMCOMPUTE_BUILD_DIR}
                     PATH_SUFFIXES "Release"
                     NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
        find_library(ARMCOMPUTE_CORE_LIBRARY_DEBUG NAMES arm_compute_core-static
                     PATHS ${ARMCOMPUTE_BUILD_DIR}
                     PATH_SUFFIXES "Debug"
                     NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
        find_library(ARMCOMPUTE_CORE_LIBRARY_RELEASE NAMES arm_compute_core-static
                     PATHS ${ARMCOMPUTE_BUILD_DIR}
                     PATH_SUFFIXES "Release"
                     NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)

        # In case it wasn't there, try a default search (will work in cases where
        # the library has been installed into a standard location)
        find_library(ARMCOMPUTE_LIBRARY_DEBUG NAMES arm_compute-static)
        find_library(ARMCOMPUTE_LIBRARY_RELEASE NAMES arm_compute-static)
        find_library(ARMCOMPUTE_CORE_LIBRARY_DEBUG NAMES arm_compute_core-static)
        find_library(ARMCOMPUTE_CORE_LIBRARY_RELEASE NAMES arm_compute_core-static)

        set(ARMCOMPUTE_LIBRARIES
            debug ${ARMCOMPUTE_LIBRARY_DEBUG} ${ARMCOMPUTE_CORE_LIBRARY_DEBUG}
            optimized ${ARMCOMPUTE_LIBRARY_RELEASE} ${ARMCOMPUTE_CORE_LIBRARY_RELEASE} )
    endif()
endif()

# ARM Compute NEON backend
if(ARMCOMPUTENEON)
    # Add preprocessor definition for ARM Compute NEON
    add_definitions(-DARMCOMPUTENEON_ENABLED)
    # The ARM Compute headers contain some NEON intrinsics, so we need to build armnn with NEON support on armv7
    if(${CMAKE_SYSTEM_PROCESSOR} MATCHES armv7 AND COMPILER_IS_GNU_LIKE)
        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=neon")
    endif()
endif()

# ARM Compute OpenCL backend
if(ARMCOMPUTECL)
    # Always use Arm compute library OpenCL headers
    find_path(OPENCL_INCLUDE CL/cl2.hpp
              PATHS ${ARMCOMPUTE_ROOT}/include
              NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)

    # Link against libOpenCL in opencl-1.2-stubs, but don't search there at runtime
    link_libraries(-L${ARMCOMPUTE_BUILD_DIR}/opencl-1.2-stubs)
    set(OPENCL_LIBRARIES OpenCL)

    include_directories(${OPENCL_INCLUDE})

    # Add preprocessor definition for ARM Compute OpenCL
    add_definitions(-DARMCOMPUTECL_ENABLED)

    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DARM_COMPUTE_DEBUG_ENABLED")
endif()

# Used by both Arm Compute backends, but should be added
# to the search path after the system directories if necessary
if(ARMCOMPUTENEON OR ARMCOMPUTECL)
    find_path(HALF_INCLUDE half/half.hpp)
    find_path(HALF_INCLUDE half/half.hpp
              PATHS ${ARMCOMPUTE_ROOT}/include
              NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
    include_directories(SYSTEM ${HALF_INCLUDE})
endif()

# Streamline annotate
if(PROFILING_BACKEND_STREAMLINE)
    include_directories("${GATOR_ROOT}/annotate")
    add_definitions(-DARMNN_STREAMLINE_ENABLED)
endif()

if(HEAP_PROFILING OR LEAK_CHECKING)
    # enable heap profiling for everything except for referencetests
    if(NOT ${PROJECT_NAME} STREQUAL "referencetests")
        find_path(HEAP_PROFILER_INCLUDE gperftools/heap-profiler.h
                PATHS ${GPERFTOOLS_ROOT}/include
                NO_DEFAULT_PATH NO_CMAKE_FIND_ROOT_PATH)
        include_directories(SYSTEM "${HEAP_PROFILER_INCLUDE}")
        find_library(GPERF_TOOLS_LIBRARY
                    NAMES tcmalloc_debug
                    HINTS ${GPERFTOOLS_ROOT}/lib)
        link_directories(${GPERFTOOLS_ROOT}/lib)

        link_libraries(${GPERF_TOOLS_LIBRARY})
        if (HEAP_PROFILING)
            add_definitions("-DARMNN_HEAP_PROFILING_ENABLED=1")
        endif()
        if (LEAK_CHECKING)
            add_definitions("-DARMNN_LEAK_CHECKING_ENABLED=1")
        endif()
    else()
        message("Heap profiling and leak checking are disabled for referencetests")
    endif()
else()
    # Valgrind only works with gperftools version number <= 2.4
    CHECK_INCLUDE_FILE(valgrind/memcheck.h VALGRIND_FOUND)
endif()


if(NOT BUILD_CAFFE_PARSER)
    message(STATUS "Caffe parser support is disabled")
endif()

if(NOT BUILD_TF_PARSER)
    message(STATUS "Tensorflow parser support is disabled")
endif()

if(NOT BUILD_TF_LITE_PARSER)
    message(STATUS "Tensorflow Lite parser support is disabled")
endif()

# ArmNN source files required for all build options
include_directories(SYSTEM third-party)