ThirdPartyPackages.cmake

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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.

set(MEGASEARCH_THIRDPARTY_DEPENDENCIES

        BOOST
        BZip2
        Easylogging++
        FAISS
        GTest
        LAPACK
        Lz4
        OpenBLAS
        Prometheus
        RocksDB
        Snappy
        SQLite
        SQLite_ORM
        Thrift
        yaml-cpp
        ZLIB
        ZSTD)

message(STATUS "Using ${MEGASEARCH_DEPENDENCY_SOURCE} approach to find dependencies")

# For each dependency, set dependency source to global default, if unset
foreach(DEPENDENCY ${MEGASEARCH_THIRDPARTY_DEPENDENCIES})
    if("${${DEPENDENCY}_SOURCE}" STREQUAL "")
        set(${DEPENDENCY}_SOURCE ${MEGASEARCH_DEPENDENCY_SOURCE})
    endif()
endforeach()

macro(build_dependency DEPENDENCY_NAME)
    if("${DEPENDENCY_NAME}" STREQUAL "BZip2")
        build_bzip2()
    elseif("${DEPENDENCY_NAME}" STREQUAL "Easylogging++")
        build_easyloggingpp()
    elseif("${DEPENDENCY_NAME}" STREQUAL "FAISS")
        build_faiss()
    elseif("${DEPENDENCY_NAME}" STREQUAL "LAPACK")
        build_lapack()
    elseif("${DEPENDENCY_NAME}" STREQUAL "Lz4")
        build_lz4()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "GTest")
        build_gtest()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "OpenBLAS")
        build_openblas()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "Prometheus")
        build_prometheus()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "RocksDB")
        build_rocksdb()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "Snappy")
        build_snappy()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "SQLite")
        build_sqlite()
    elseif ("${DEPENDENCY_NAME}" STREQUAL "SQLite_ORM")
        build_sqlite_orm()
    elseif("${DEPENDENCY_NAME}" STREQUAL "Thrift")
        build_thrift()
    elseif("${DEPENDENCY_NAME}" STREQUAL "yaml-cpp")
        build_yamlcpp()
    elseif("${DEPENDENCY_NAME}" STREQUAL "ZLIB")
        build_zlib()
    elseif("${DEPENDENCY_NAME}" STREQUAL "ZSTD")
        build_zstd()
    else()
        message(FATAL_ERROR "Unknown thirdparty dependency to build: ${DEPENDENCY_NAME}")
    endif ()
endmacro()

macro(resolve_dependency DEPENDENCY_NAME)
    if (${DEPENDENCY_NAME}_SOURCE STREQUAL "AUTO")
        #message(STATUS "Finding ${DEPENDENCY_NAME} package")
#        find_package(${DEPENDENCY_NAME} QUIET)
#        if (NOT ${DEPENDENCY_NAME}_FOUND)
            #message(STATUS "${DEPENDENCY_NAME} package not found")
        build_dependency(${DEPENDENCY_NAME})
#        endif ()
    elseif (${DEPENDENCY_NAME}_SOURCE STREQUAL "BUNDLED")
        build_dependency(${DEPENDENCY_NAME})
    elseif (${DEPENDENCY_NAME}_SOURCE STREQUAL "SYSTEM")
        find_package(${DEPENDENCY_NAME} REQUIRED)
    endif ()
endmacro()

# ----------------------------------------------------------------------
# ExternalProject options

string(TOUPPER ${CMAKE_BUILD_TYPE} UPPERCASE_BUILD_TYPE)

set(EP_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${UPPERCASE_BUILD_TYPE}}")
set(EP_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${UPPERCASE_BUILD_TYPE}}")

if(NOT MSVC)
    # Set -fPIC on all external projects
    set(EP_CXX_FLAGS "${EP_CXX_FLAGS} -fPIC")
    set(EP_C_FLAGS "${EP_C_FLAGS} -fPIC")
endif()

# CC/CXX environment variables are captured on the first invocation of the
# builder (e.g make or ninja) instead of when CMake is invoked into to build
# directory. This leads to issues if the variables are exported in a subshell
# and the invocation of make/ninja is in distinct subshell without the same
# environment (CC/CXX).
set(EP_COMMON_TOOLCHAIN -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
        -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER})

if(CMAKE_AR)
    set(EP_COMMON_TOOLCHAIN ${EP_COMMON_TOOLCHAIN} -DCMAKE_AR=${CMAKE_AR})
endif()

if(CMAKE_RANLIB)
    set(EP_COMMON_TOOLCHAIN ${EP_COMMON_TOOLCHAIN} -DCMAKE_RANLIB=${CMAKE_RANLIB})
endif()

# External projects are still able to override the following declarations.
# cmake command line will favor the last defined variable when a duplicate is
# encountered. This requires that `EP_COMMON_CMAKE_ARGS` is always the first
# argument.
set(EP_COMMON_CMAKE_ARGS
        ${EP_COMMON_TOOLCHAIN}
        -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
        -DCMAKE_C_FLAGS=${EP_C_FLAGS}
        -DCMAKE_C_FLAGS_${UPPERCASE_BUILD_TYPE}=${EP_C_FLAGS}
        -DCMAKE_CXX_FLAGS=${EP_CXX_FLAGS}
        -DCMAKE_CXX_FLAGS_${UPPERCASE_BUILD_TYPE}=${EP_CXX_FLAGS})

if(NOT MEGASEARCH_VERBOSE_THIRDPARTY_BUILD)
    set(EP_LOG_OPTIONS LOG_CONFIGURE 1 LOG_BUILD 1 LOG_INSTALL 1 LOG_DOWNLOAD 1)
else()
    set(EP_LOG_OPTIONS)
endif()

# Ensure that a default make is set
if("${MAKE}" STREQUAL "")
    if(NOT MSVC)
        find_program(MAKE make)
    endif()
endif()

set(MAKE_BUILD_ARGS "-j4")

## Using make -j in sub-make is fragile
## see discussion https://github.com/apache/MEGASEARCH/pull/2779
#if(${CMAKE_GENERATOR} MATCHES "Makefiles")
#    set(MAKE_BUILD_ARGS "")
#else()
#    # limit the maximum number of jobs for ninja
#    set(MAKE_BUILD_ARGS "-j4")
#endif()

# ----------------------------------------------------------------------
# Find pthreads

set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)

# ----------------------------------------------------------------------
# Versions and URLs for toolchain builds, which also can be used to configure
# offline builds

# Read toolchain versions from cpp/thirdparty/versions.txt
set(THIRDPARTY_DIR "${MEGASEARCH_SOURCE_DIR}/thirdparty")
file(STRINGS "${THIRDPARTY_DIR}/versions.txt" TOOLCHAIN_VERSIONS_TXT)
foreach(_VERSION_ENTRY ${TOOLCHAIN_VERSIONS_TXT})
    # Exclude comments
    if(NOT _VERSION_ENTRY MATCHES "^[^#][A-Za-z0-9-_]+_VERSION=")
        continue()
    endif()

    string(REGEX MATCH "^[^=]*" _LIB_NAME ${_VERSION_ENTRY})
    string(REPLACE "${_LIB_NAME}=" "" _LIB_VERSION ${_VERSION_ENTRY})

    # Skip blank or malformed lines
    if(${_LIB_VERSION} STREQUAL "")
        continue()
    endif()

    # For debugging
    #message(STATUS "${_LIB_NAME}: ${_LIB_VERSION}")

    set(${_LIB_NAME} "${_LIB_VERSION}")
endforeach()

if(DEFINED ENV{MEGASEARCH_BOOST_URL})
    set(BOOST_SOURCE_URL "$ENV{MEGASEARCH_BOOST_URL}")
else()
    string(REPLACE "." "_" BOOST_VERSION_UNDERSCORES ${BOOST_VERSION})
    set(BOOST_SOURCE_URL
            "https://dl.bintray.com/boostorg/release/${BOOST_VERSION}/source/boost_${BOOST_VERSION_UNDERSCORES}.tar.gz"
    )
endif()

if(DEFINED ENV{MEGASEARCH_BZIP2_URL})
    set(BZIP2_SOURCE_URL "$ENV{MEGASEARCH_BZIP2_URL}")
else()
    set(BZIP2_SOURCE_URL "https://fossies.org/linux/misc/bzip2-${BZIP2_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_EASYLOGGINGPP_URL})
    set(EASYLOGGINGPP_SOURCE_URL "$ENV{MEGASEARCH_EASYLOGGINGPP_URL}")
else()
    set(EASYLOGGINGPP_SOURCE_URL "https://github.com/zuhd-org/easyloggingpp/archive/${EASYLOGGINGPP_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_FAISS_URL})
    set(FAISS_SOURCE_URL "$ENV{MEGASEARCH_FAISS_URL}")
else()
    set(FAISS_SOURCE_URL "https://github.com/JinHai-CN/faiss/archive/${FAISS_VERSION}.tar.gz")
endif()

if (DEFINED ENV{MEGASEARCH_GTEST_URL})
    set(GTEST_SOURCE_URL "$ENV{MEGASEARCH_GTEST_URL}")
else ()
    set(GTEST_SOURCE_URL
            "https://github.com/google/googletest/archive/release-${GTEST_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_LAPACK_URL})
    set(LAPACK_SOURCE_URL "$ENV{MEGASEARCH_LAPACK_URL}")
else()
    set(LAPACK_SOURCE_URL "https://github.com/Reference-LAPACK/lapack/archive/${LAPACK_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_LZ4_URL})
    set(LZ4_SOURCE_URL "$ENV{MEGASEARCH_LZ4_URL}")
else()
    set(LZ4_SOURCE_URL "https://github.com/lz4/lz4/archive/${LZ4_VERSION}.tar.gz")
endif()

if (DEFINED ENV{MEGASEARCH_OPENBLAS_URL})
    set(OPENBLAS_SOURCE_URL "$ENV{MEGASEARCH_OPENBLAS_URL}")
else ()
    set(OPENBLAS_SOURCE_URL
            "https://github.com/xianyi/OpenBLAS/archive/${OPENBLAS_VERSION}.tar.gz")
endif()

if (DEFINED ENV{MEGASEARCH_PROMETHEUS_URL})
    set(PROMETHEUS_SOURCE_URL "$ENV{PROMETHEUS_OPENBLAS_URL}")
else ()
    set(PROMETHEUS_SOURCE_URL
            #"https://github.com/JinHai-CN/prometheus-cpp/archive/${PROMETHEUS_VERSION}.tar.gz"
            https://github.com/jupp0r/prometheus-cpp.git)
endif()

if (DEFINED ENV{MEGASEARCH_ROCKSDB_URL})
    set(ROCKSDB_SOURCE_URL "$ENV{MEGASEARCH_ROCKSDB_URL}")
else ()
    set(ROCKSDB_SOURCE_URL
            "https://github.com/facebook/rocksdb/archive/${ROCKSDB_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_SNAPPY_URL})
    set(SNAPPY_SOURCE_URL "$ENV{MEGASEARCH_SNAPPY_URL}")
else()
    set(SNAPPY_SOURCE_URL
            "https://github.com/google/snappy/archive/${SNAPPY_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_SQLITE_URL})
    set(SQLITE_SOURCE_URL "$ENV{MEGASEARCH_SQLITE_URL}")
else()
    set(SQLITE_SOURCE_URL
            "https://www.sqlite.org/2019/sqlite-autoconf-${SQLITE_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_SQLITE_ORM_URL})
    set(SQLITE_ORM_SOURCE_URL "$ENV{MEGASEARCH_SQLITE_ORM_URL}")
else()
    set(SQLITE_ORM_SOURCE_URL
            "https://github.com/fnc12/sqlite_orm/archive/${SQLITE_ORM_VERSION}.zip")
endif()

if(DEFINED ENV{MEGASEARCH_THRIFT_URL})
    set(THRIFT_SOURCE_URL "$ENV{MEGASEARCH_THRIFT_URL}")
else()
    set(THRIFT_SOURCE_URL
            "https://github.com/apache/thrift/archive/${THRIFT_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_YAMLCPP_URL})
    set(YAMLCPP_SOURCE_URL "$ENV{MEGASEARCH_YAMLCPP_URL}")
else()
    set(YAMLCPP_SOURCE_URL "https://github.com/jbeder/yaml-cpp/archive/yaml-cpp-${YAMLCPP_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_ZLIB_URL})
    set(ZLIB_SOURCE_URL "$ENV{MEGASEARCH_ZLIB_URL}")
else()
    set(ZLIB_SOURCE_URL "https://github.com/madler/zlib/archive/${ZLIB_VERSION}.tar.gz")
endif()

if(DEFINED ENV{MEGASEARCH_ZSTD_URL})
    set(ZSTD_SOURCE_URL "$ENV{MEGASEARCH_ZSTD_URL}")
else()
    set(ZSTD_SOURCE_URL "https://github.com/facebook/zstd/archive/${ZSTD_VERSION}.tar.gz")
endif()

# ----------------------------------------------------------------------
# Add Boost dependencies (code adapted from Apache Kudu (incubating))

set(Boost_USE_MULTITHREADED ON)
if(MSVC AND MEGASEARCH_USE_STATIC_CRT)
    set(Boost_USE_STATIC_RUNTIME ON)
endif()
set(Boost_ADDITIONAL_VERSIONS
        "1.70.0"
        "1.70"
        "1.69.0"
        "1.69"
        "1.68.0"
        "1.68"
        "1.67.0"
        "1.67"
        "1.66.0"
        "1.66"
        "1.65.0"
        "1.65"
        "1.64.0"
        "1.64"
        "1.63.0"
        "1.63"
        "1.62.0"
        "1.61"
        "1.61.0"
        "1.62"
        "1.60.0"
        "1.60")

if(MEGASEARCH_BOOST_VENDORED)
    set(BOOST_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/boost_ep-prefix/src/boost_ep")
    set(BOOST_LIB_DIR "${BOOST_PREFIX}/stage/lib")
    set(BOOST_BUILD_LINK "static")
    set(BOOST_STATIC_SYSTEM_LIBRARY
            "${BOOST_LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}boost_system${CMAKE_STATIC_LIBRARY_SUFFIX}"
    )
    set(BOOST_STATIC_FILESYSTEM_LIBRARY
            "${BOOST_LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}boost_filesystem${CMAKE_STATIC_LIBRARY_SUFFIX}"
    )
    set(BOOST_STATIC_SERIALIZATION_LIBRARY
            "${BOOST_LIB_DIR}/${CMAKE_STATIC_LIBRARY_PREFIX}boost_serialization${CMAKE_STATIC_LIBRARY_SUFFIX}"
    )
    set(BOOST_SYSTEM_LIBRARY boost_system_static)
    set(BOOST_FILESYSTEM_LIBRARY boost_filesystem_static)
    set(BOOST_SERIALIZATION_LIBRARY boost_serialization_static)

    if(MEGASEARCH_BOOST_HEADER_ONLY)
        set(BOOST_BUILD_PRODUCTS)
        set(BOOST_CONFIGURE_COMMAND "")
        set(BOOST_BUILD_COMMAND "")
    else()
        set(BOOST_BUILD_PRODUCTS ${BOOST_STATIC_SYSTEM_LIBRARY}
                ${BOOST_STATIC_FILESYSTEM_LIBRARY} ${BOOST_STATIC_SERIALIZATION_LIBRARY})
        set(BOOST_CONFIGURE_COMMAND "./bootstrap.sh" "--prefix=${BOOST_PREFIX}"
                "--with-libraries=filesystem,serialization,system")
        if("${CMAKE_BUILD_TYPE}" STREQUAL "DEBUG")
            set(BOOST_BUILD_VARIANT "debug")
        else()
            set(BOOST_BUILD_VARIANT "release")
        endif()
        set(BOOST_BUILD_COMMAND
                "./b2"
                "link=${BOOST_BUILD_LINK}"
                "variant=${BOOST_BUILD_VARIANT}"
                "cxxflags=-fPIC")

        add_thirdparty_lib(boost_system STATIC_LIB "${BOOST_STATIC_SYSTEM_LIBRARY}")

        add_thirdparty_lib(boost_filesystem STATIC_LIB "${BOOST_STATIC_FILESYSTEM_LIBRARY}")

        add_thirdparty_lib(boost_serialization STATIC_LIB "${BOOST_STATIC_SERIALIZATION_LIBRARY}")

        set(MEGASEARCH_BOOST_LIBS ${BOOST_SYSTEM_LIBRARY} ${BOOST_FILESYSTEM_LIBRARY} ${BOOST_STATIC_SERIALIZATION_LIBRARY})
    endif()
    externalproject_add(boost_ep
            URL
            ${BOOST_SOURCE_URL}
            BUILD_BYPRODUCTS
            ${BOOST_BUILD_PRODUCTS}
            BUILD_IN_SOURCE
            1
            CONFIGURE_COMMAND
            ${BOOST_CONFIGURE_COMMAND}
            BUILD_COMMAND
            ${BOOST_BUILD_COMMAND}
            INSTALL_COMMAND
            ""
            ${EP_LOG_OPTIONS})
    set(Boost_INCLUDE_DIR "${BOOST_PREFIX}")
    set(Boost_INCLUDE_DIRS "${BOOST_INCLUDE_DIR}")
    add_dependencies(boost_system_static boost_ep)
    add_dependencies(boost_filesystem_static boost_ep)
    add_dependencies(boost_serialization_static boost_ep)

else()
    if(MSVC)
        # disable autolinking in boost
        add_definitions(-DBOOST_ALL_NO_LIB)
    endif()

#    if(DEFINED ENV{BOOST_ROOT} OR DEFINED BOOST_ROOT)
#        # In older versions of CMake (such as 3.2), the system paths for Boost will
#        # be looked in first even if we set $BOOST_ROOT or pass -DBOOST_ROOT
#        set(Boost_NO_SYSTEM_PATHS ON)
#    endif()

    if(MEGASEARCH_BOOST_USE_SHARED)
        # Find shared Boost libraries.
        set(Boost_USE_STATIC_LIBS OFF)
        set(BUILD_SHARED_LIBS_KEEP ${BUILD_SHARED_LIBS})
        set(BUILD_SHARED_LIBS ON)

        if(MSVC)
            # force all boost libraries to dynamic link
            add_definitions(-DBOOST_ALL_DYN_LINK)
        endif()

        if(MEGASEARCH_BOOST_HEADER_ONLY)
            find_package(Boost REQUIRED)
        else()
            find_package(Boost COMPONENTS serialization system filesystem REQUIRED)
            set(BOOST_SYSTEM_LIBRARY Boost::system)
            set(BOOST_FILESYSTEM_LIBRARY Boost::filesystem)
            set(BOOST_SERIALIZATION_LIBRARY Boost::serialization)
            set(MEGASEARCH_BOOST_LIBS ${BOOST_SYSTEM_LIBRARY} ${BOOST_FILESYSTEM_LIBRARY})
        endif()
        set(BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS_KEEP})
        unset(BUILD_SHARED_LIBS_KEEP)
    else()
        # Find static boost headers and libs
        # TODO Differentiate here between release and debug builds
        set(Boost_USE_STATIC_LIBS ON)
        if(MEGASEARCH_BOOST_HEADER_ONLY)
            find_package(Boost REQUIRED)
        else()
            find_package(Boost COMPONENTS serialization system filesystem REQUIRED)
            set(BOOST_SYSTEM_LIBRARY Boost::system)
            set(BOOST_FILESYSTEM_LIBRARY Boost::filesystem)
            set(BOOST_SERIALIZATION_LIBRARY Boost::serialization)
            set(MEGASEARCH_BOOST_LIBS ${BOOST_SYSTEM_LIBRARY} ${BOOST_FILESYSTEM_LIBRARY})
        endif()
    endif()
endif()

#message(STATUS "Boost include dir: " ${Boost_INCLUDE_DIR})
#message(STATUS "Boost libraries: " ${Boost_LIBRARIES})

include_directories(SYSTEM ${Boost_INCLUDE_DIR})
link_directories(SYSTEM ${BOOST_LIB_DIR})

# ----------------------------------------------------------------------
# bzip2

macro(build_bzip2)
    message(STATUS "Building BZip2-${BZIP2_VERSION} from source")
    set(BZIP2_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/bzip2_ep-prefix/src/bzip2_ep")
    set(BZIP2_INCLUDE_DIR "${BZIP2_PREFIX}/include")
    set(BZIP2_STATIC_LIB
            "${BZIP2_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}bz2${CMAKE_STATIC_LIBRARY_SUFFIX}")

    externalproject_add(bzip2_ep
                        ${EP_LOG_OPTIONS}
                        CONFIGURE_COMMAND
                        ""
                        BUILD_IN_SOURCE
                        1
                        BUILD_COMMAND
                        ${MAKE}
                        ${MAKE_BUILD_ARGS}
                        CFLAGS=${EP_C_FLAGS}
                        INSTALL_COMMAND
                        ${MAKE}
                        install
                        PREFIX=${BZIP2_PREFIX}
                        CFLAGS=${EP_C_FLAGS}
                        INSTALL_DIR
                        ${BZIP2_PREFIX}
                        URL
                        ${BZIP2_SOURCE_URL}
                        BUILD_BYPRODUCTS
                        "${BZIP2_STATIC_LIB}")

    file(MAKE_DIRECTORY "${BZIP2_INCLUDE_DIR}")
    add_library(bzip2 STATIC IMPORTED)
    set_target_properties(
            bzip2
            PROPERTIES IMPORTED_LOCATION "${BZIP2_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${BZIP2_INCLUDE_DIR}")

    add_dependencies(bzip2 bzip2_ep)
endmacro()

if(MEGASEARCH_WITH_BZ2)
    resolve_dependency(BZip2)

    if(NOT TARGET bzip2)
        add_library(bzip2 UNKNOWN IMPORTED)
        set_target_properties(bzip2
                PROPERTIES IMPORTED_LOCATION "${BZIP2_LIBRARIES}"
                INTERFACE_INCLUDE_DIRECTORIES "${BZIP2_INCLUDE_DIR}")
    endif()
    link_directories(SYSTEM ${BZIP2_PREFIX}/lib/)
    include_directories(SYSTEM "${BZIP2_INCLUDE_DIR}")
endif()

# ----------------------------------------------------------------------
# Easylogging++

macro(build_easyloggingpp)
    message(STATUS "Building Easylogging++-${EASYLOGGINGPP_VERSION} from source")
    set(EASYLOGGINGPP_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/easyloggingpp_ep-prefix/src/easyloggingpp_ep")
    set(EASYLOGGINGPP_INCLUDE_DIR "${EASYLOGGINGPP_PREFIX}/include")
    set(EASYLOGGINGPP_STATIC_LIB
            "${EASYLOGGINGPP_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}easyloggingpp${CMAKE_STATIC_LIBRARY_SUFFIX}")

    set(EASYLOGGINGPP_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            "-DCMAKE_INSTALL_PREFIX=${EASYLOGGINGPP_PREFIX}"
            -DCMAKE_INSTALL_LIBDIR=lib
            -Dtest=OFF
            -Dbuild_static_lib=ON)

    externalproject_add(easyloggingpp_ep
            URL
            ${EASYLOGGINGPP_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CMAKE_ARGS
            ${EASYLOGGINGPP_CMAKE_ARGS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_BYPRODUCTS
            ${EASYLOGGINGPP_STATIC_LIB})

    file(MAKE_DIRECTORY "${EASYLOGGINGPP_INCLUDE_DIR}")
    add_library(easyloggingpp STATIC IMPORTED)
    set_target_properties(
            easyloggingpp
            PROPERTIES IMPORTED_LOCATION "${EASYLOGGINGPP_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${EASYLOGGINGPP_INCLUDE_DIR}")

    add_dependencies(easyloggingpp easyloggingpp_ep)
endmacro()

if(MEGASEARCH_WITH_EASYLOGGINGPP)
    resolve_dependency(Easylogging++)

    get_target_property(EASYLOGGINGPP_INCLUDE_DIR easyloggingpp INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM "${EASYLOGGINGPP_PREFIX}/lib")
    include_directories(SYSTEM "${EASYLOGGINGPP_INCLUDE_DIR}")
endif()

# ----------------------------------------------------------------------
# OpenBLAS

macro(build_openblas)
    message(STATUS "Building OpenBLAS-${OPENBLAS_VERSION} from source")
    set(OPENBLAS_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/openblas_ep-prefix/src/openblas_ep")
    set(OPENBLAS_INCLUDE_DIR "${OPENBLAS_PREFIX}/include")
    set(OPENBLAS_STATIC_LIB
            "${OPENBLAS_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}openblas${CMAKE_STATIC_LIBRARY_SUFFIX}")

    externalproject_add(openblas_ep
            URL
            ${OPENBLAS_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CONFIGURE_COMMAND
            ""
            BUILD_IN_SOURCE
            1
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            INSTALL_COMMAND
            ${MAKE}
            PREFIX=${OPENBLAS_PREFIX}
            install
            BUILD_BYPRODUCTS
            ${OPENBLAS_STATIC_LIB})

    file(MAKE_DIRECTORY "${OPENBLAS_INCLUDE_DIR}")
    add_library(openblas STATIC IMPORTED)
    set_target_properties(
            openblas
            PROPERTIES IMPORTED_LOCATION "${OPENBLAS_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${OPENBLAS_INCLUDE_DIR}")

    add_dependencies(openblas openblas_ep)
endmacro()

#if(MEGASEARCH_WITH_OPENBLAS)
#    resolve_dependency(OpenBLAS)
#
#    get_target_property(OPENBLAS_INCLUDE_DIR openblas INTERFACE_INCLUDE_DIRECTORIES)
#    include_directories(SYSTEM "${OPENBLAS_INCLUDE_DIR}")
#endif()

# ----------------------------------------------------------------------
# LAPACK

macro(build_lapack)
    message(STATUS "Building LAPACK-${LAPACK_VERSION} from source")
    set(LAPACK_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/lapack_ep-prefix/src/lapack_ep")
    set(LAPACK_INCLUDE_DIR "${LAPACK_PREFIX}/include")
    set(LAPACK_STATIC_LIB
            "${LAPACK_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}lapack${CMAKE_STATIC_LIBRARY_SUFFIX}")

    set(LAPACK_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            "-DCMAKE_INSTALL_PREFIX=${LAPACK_PREFIX}"
            -DCMAKE_INSTALL_LIBDIR=lib)

    externalproject_add(lapack_ep
            URL
            ${LAPACK_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CMAKE_ARGS
            ${LAPACK_CMAKE_ARGS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_BYPRODUCTS
            ${LAPACK_STATIC_LIB})

    file(MAKE_DIRECTORY "${LAPACK_INCLUDE_DIR}")
    add_library(lapack STATIC IMPORTED)
    set_target_properties(
            lapack
            PROPERTIES IMPORTED_LOCATION "${LAPACK_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${LAPACK_INCLUDE_DIR}")

    add_dependencies(lapack lapack_ep)
endmacro()

#if(MEGASEARCH_WITH_LAPACK)
#    resolve_dependency(LAPACK)
#
#    get_target_property(LAPACK_INCLUDE_DIR lapack INTERFACE_INCLUDE_DIRECTORIES)
#    include_directories(SYSTEM "${LAPACK_INCLUDE_DIR}")
#endif()

# ----------------------------------------------------------------------
# FAISS

macro(build_faiss)
    message(STATUS "Building FAISS-${FAISS_VERSION} from source")
    set(FAISS_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/faiss_ep-prefix/src/faiss_ep")
    set(FAISS_INCLUDE_DIR "${FAISS_PREFIX}/include")
    set(FAISS_STATIC_LIB
            "${FAISS_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}faiss${CMAKE_STATIC_LIBRARY_SUFFIX}")

#    add_custom_target(faiss_dependencies)
#    add_dependencies(faiss_dependencies openblas_ep)
#    add_dependencies(faiss_dependencies openblas)
#    get_target_property(FAISS_OPENBLAS_LIB_DIR openblas IMPORTED_LOCATION)
#    get_filename_component(FAISS_OPENBLAS_LIB "${FAISS_OPENBLAS_LIB_DIR}" DIRECTORY)

    set(FAISS_CONFIGURE_ARGS
            "--prefix=${FAISS_PREFIX}"
            "CFLAGS=${EP_C_FLAGS}"
            "CXXFLAGS=${EP_CXX_FLAGS}"
            "LDFLAGS=-L${OPENBLAS_PREFIX}/lib -L${LAPACK_PREFIX}/lib -lopenblas -llapack"
            --without-python)

#    if(OPENBLAS_STATIC_LIB)
#        set(OPENBLAS_LIBRARY ${OPENBLAS_STATIC_LIB})
#    else()
#        set(OPENBLAS_LIBRARY ${OPENBLAS_SHARED_LIB})
#    endif()
#    set(FAISS_DEPENDENCIES ${FAISS_DEPENDENCIES} ${OPENBLAS_LIBRARY})

    if(${MEGASEARCH_WITH_FAISS_GPU_VERSION} STREQUAL "ON")
        set(FAISS_CONFIGURE_ARGS ${FAISS_CONFIGURE_ARGS}
                "--with-cuda=${CUDA_TOOLKIT_ROOT_DIR}"
                "--with-cuda-arch=${MEGASEARCH_FAISS_GPU_ARCH}")
    else()
        set(FAISS_CONFIGURE_ARGS ${FAISS_CONFIGURE_ARGS} --without-cuda)
    endif()

    externalproject_add(faiss_ep
            URL
            ${FAISS_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CONFIGURE_COMMAND
            "./configure"
            ${FAISS_CONFIGURE_ARGS}
#            BINARY_DIR
#            ${FAISS_PREFIX}
#            INSTALL_DIR
#            ${FAISS_PREFIX}
#            BUILD_COMMAND
#            ${MAKE} ${MAKE_BUILD_ARGS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS} all
            BUILD_IN_SOURCE
            1
#            INSTALL_DIR
#            ${FAISS_PREFIX}
#            INSTALL_COMMAND
#            ""
            BUILD_BYPRODUCTS
            ${FAISS_STATIC_LIB})
#            DEPENDS
#            ${faiss_dependencies})

    ExternalProject_Add_StepDependencies(faiss_ep build openblas_ep lapack_ep)

    file(MAKE_DIRECTORY "${FAISS_INCLUDE_DIR}")
    add_library(faiss STATIC IMPORTED)
    set_target_properties(
            faiss
            PROPERTIES IMPORTED_LOCATION "${FAISS_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${FAISS_INCLUDE_DIR}"
            INTERFACE_LINK_LIBRARIES "openblas;lapack" )

    add_dependencies(faiss faiss_ep)
    #add_dependencies(faiss openblas_ep)
    #add_dependencies(faiss lapack_ep)
    #target_link_libraries(faiss ${OPENBLAS_PREFIX}/lib)
    #target_link_libraries(faiss ${LAPACK_PREFIX}/lib)

endmacro()

if(MEGASEARCH_WITH_FAISS)

    resolve_dependency(OpenBLAS)
    get_target_property(OPENBLAS_INCLUDE_DIR openblas INTERFACE_INCLUDE_DIRECTORIES)
    include_directories(SYSTEM "${OPENBLAS_INCLUDE_DIR}")
    link_directories(SYSTEM ${OPENBLAS_PREFIX}/lib)

    resolve_dependency(LAPACK)
    get_target_property(LAPACK_INCLUDE_DIR lapack INTERFACE_INCLUDE_DIRECTORIES)
    include_directories(SYSTEM "${LAPACK_INCLUDE_DIR}")
    link_directories(SYSTEM "${LAPACK_PREFIX}/lib")

    resolve_dependency(FAISS)
    get_target_property(FAISS_INCLUDE_DIR faiss INTERFACE_INCLUDE_DIRECTORIES)
    include_directories(SYSTEM "${FAISS_INCLUDE_DIR}")
    link_directories(SYSTEM ${FAISS_PREFIX}/lib/)
endif()

# ----------------------------------------------------------------------
# Google gtest

macro(build_gtest)
    message(STATUS "Building gtest-${GTEST_VERSION} from source")
    set(GTEST_VENDORED TRUE)
    set(GTEST_CMAKE_CXX_FLAGS "${EP_CXX_FLAGS}")

    if(APPLE)
        set(GTEST_CMAKE_CXX_FLAGS
                ${GTEST_CMAKE_CXX_FLAGS}
                -DGTEST_USE_OWN_TR1_TUPLE=1
                -Wno-unused-value
                -Wno-ignored-attributes)
    endif()

    set(GTEST_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/googletest_ep-prefix/src/googletest_ep")
    set(GTEST_INCLUDE_DIR "${GTEST_PREFIX}/include")
    set(GTEST_STATIC_LIB
            "${GTEST_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}gtest${CMAKE_STATIC_LIBRARY_SUFFIX}")
    set(GTEST_MAIN_STATIC_LIB
            "${GTEST_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}gtest_main${CMAKE_STATIC_LIBRARY_SUFFIX}")

    set(GTEST_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            "-DCMAKE_INSTALL_PREFIX=${GTEST_PREFIX}"
            "-DCMAKE_INSTALL_LIBDIR=lib"
            -DCMAKE_CXX_FLAGS=${GTEST_CMAKE_CXX_FLAGS}
            -DCMAKE_BUILD_TYPE=Release)

    set(GMOCK_INCLUDE_DIR "${GTEST_PREFIX}/include")
    set(GMOCK_STATIC_LIB
            "${GTEST_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}gmock${CMAKE_STATIC_LIBRARY_SUFFIX}"
    )


    ExternalProject_Add(googletest_ep
                        URL
                        ${GTEST_SOURCE_URL}
                        BUILD_COMMAND
                        ${MAKE}
                        ${MAKE_BUILD_ARGS}
                        BUILD_BYPRODUCTS
                        ${GTEST_STATIC_LIB}
                        ${GTEST_MAIN_STATIC_LIB}
                        ${GMOCK_STATIC_LIB}
                        CMAKE_ARGS
                        ${GTEST_CMAKE_ARGS}
                        ${EP_LOG_OPTIONS})

    # The include directory must exist before it is referenced by a target.
    file(MAKE_DIRECTORY "${GTEST_INCLUDE_DIR}")

    add_library(gtest STATIC IMPORTED)
    set_target_properties(gtest
                            PROPERTIES IMPORTED_LOCATION "${GTEST_STATIC_LIB}"
                            INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIR}")

    add_library(gtest_main STATIC IMPORTED)
    set_target_properties(gtest_main
                            PROPERTIES IMPORTED_LOCATION "${GTEST_MAIN_STATIC_LIB}"
                            INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIR}")

    add_library(gmock STATIC IMPORTED)
    set_target_properties(gmock
            PROPERTIES IMPORTED_LOCATION "${GMOCK_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIR}")

    add_dependencies(gtest googletest_ep)
    add_dependencies(gtest_main googletest_ep)
    add_dependencies(gmock googletest_ep)

endmacro()

if (MEGASEARCH_BUILD_TESTS)
    #message(STATUS "Resolving gtest dependency")
    resolve_dependency(GTest)

    if(NOT GTEST_VENDORED)
    endif()

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(GTEST_INCLUDE_DIR gtest INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM "${GTEST_PREFIX}/lib")
    include_directories(SYSTEM ${GTEST_INCLUDE_DIR})
endif()

# ----------------------------------------------------------------------
# lz4

macro(build_lz4)
    message(STATUS "Building lz4-${LZ4_VERSION} from source")
    set(LZ4_BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/lz4_ep-prefix/src/lz4_ep")
    set(LZ4_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/lz4_ep-prefix/")

    if(MSVC)
        if(MEGASEARCH_USE_STATIC_CRT)
            if(${UPPERCASE_BUILD_TYPE} STREQUAL "DEBUG")
                set(LZ4_RUNTIME_LIBRARY_LINKAGE "/p:RuntimeLibrary=MultiThreadedDebug")
            else()
                set(LZ4_RUNTIME_LIBRARY_LINKAGE "/p:RuntimeLibrary=MultiThreaded")
            endif()
        endif()
        set(LZ4_STATIC_LIB
                "${LZ4_BUILD_DIR}/visual/VS2010/bin/x64_${CMAKE_BUILD_TYPE}/liblz4_static.lib")
        set(LZ4_BUILD_COMMAND
                BUILD_COMMAND
                msbuild.exe
                /m
                /p:Configuration=${CMAKE_BUILD_TYPE}
                /p:Platform=x64
                /p:PlatformToolset=v140
                ${LZ4_RUNTIME_LIBRARY_LINKAGE}
                /t:Build
                ${LZ4_BUILD_DIR}/visual/VS2010/lz4.sln)
    else()
        set(LZ4_STATIC_LIB "${LZ4_BUILD_DIR}/lib/liblz4.a")
        #set(LZ4_BUILD_COMMAND BUILD_COMMAND ${CMAKE_SOURCE_DIR}/build-support/build-lz4-lib.sh
        #        "AR=${CMAKE_AR}")
        set(LZ4_BUILD_COMMAND BUILD_COMMAND ${MAKE} ${MAKE_BUILD_ARGS} CFLAGS=${EP_C_FLAGS})
    endif()

    # We need to copy the header in lib to directory outside of the build
    externalproject_add(lz4_ep
            URL
            ${LZ4_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            UPDATE_COMMAND
            ${CMAKE_COMMAND}
            -E
            copy_directory
            "${LZ4_BUILD_DIR}/lib"
            "${LZ4_PREFIX}/include"
            ${LZ4_PATCH_COMMAND}
            CONFIGURE_COMMAND
            ""
            INSTALL_COMMAND
            ""
            BINARY_DIR
            ${LZ4_BUILD_DIR}
            BUILD_BYPRODUCTS
            ${LZ4_STATIC_LIB}
            ${LZ4_BUILD_COMMAND})

    file(MAKE_DIRECTORY "${LZ4_PREFIX}/include")
    add_library(lz4 STATIC IMPORTED)
    set_target_properties(lz4
            PROPERTIES IMPORTED_LOCATION "${LZ4_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${LZ4_PREFIX}/include")
    add_dependencies(lz4 lz4_ep)
endmacro()

if(MEGASEARCH_WITH_LZ4)
    resolve_dependency(Lz4)

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(LZ4_INCLUDE_DIR lz4 INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${LZ4_BUILD_DIR}/lib/)
    include_directories(SYSTEM ${LZ4_INCLUDE_DIR})
endif()

# ----------------------------------------------------------------------
# Prometheus

macro(build_prometheus)
    message(STATUS "Building Prometheus-${PROMETHEUS_VERSION} from source")
    set(PROMETHEUS_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/prometheus_ep-prefix/src/prometheus_ep")
    set(PROMETHEUS_STATIC_LIB_NAME prometheus-cpp)
    set(PROMETHEUS_CORE_STATIC_LIB
            "${PROMETHEUS_PREFIX}/core/${CMAKE_STATIC_LIBRARY_PREFIX}${PROMETHEUS_STATIC_LIB_NAME}-core${CMAKE_STATIC_LIBRARY_SUFFIX}"
            )
    set(PROMETHEUS_PUSH_STATIC_LIB
            "${PROMETHEUS_PREFIX}/push/${CMAKE_STATIC_LIBRARY_PREFIX}${PROMETHEUS_STATIC_LIB_NAME}-push${CMAKE_STATIC_LIBRARY_SUFFIX}"
            )
    set(PROMETHEUS_PULL_STATIC_LIB
            "${PROMETHEUS_PREFIX}/pull/${CMAKE_STATIC_LIBRARY_PREFIX}${PROMETHEUS_STATIC_LIB_NAME}-pull${CMAKE_STATIC_LIBRARY_SUFFIX}"
            )

    set(PROMETHEUS_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            -DCMAKE_INSTALL_LIBDIR=lib
            -DBUILD_SHARED_LIBS=OFF
            "-DCMAKE_INSTALL_PREFIX=${PROMETHEUS_PREFIX}"
            -DCMAKE_BUILD_TYPE=Release)

    externalproject_add(prometheus_ep
            GIT_REPOSITORY
            ${PROMETHEUS_SOURCE_URL}
            GIT_TAG
            ${PROMETHEUS_VERSION}
            GIT_SHALLOW
            TRUE
#            GIT_CONFIG
#            recurse-submodules=true
#            URL
#            ${PROMETHEUS_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CMAKE_ARGS
            ${PROMETHEUS_CMAKE_ARGS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_IN_SOURCE
            1
            INSTALL_COMMAND
            ${MAKE}
            "DESTDIR=${PROMETHEUS_PREFIX}"
            install
            BUILD_BYPRODUCTS
            "${PROMETHEUS_CORE_STATIC_LIB}"
            "${PROMETHEUS_PUSH_STATIC_LIB}"
            "${PROMETHEUS_PULL_STATIC_LIB}")

    file(MAKE_DIRECTORY "${PROMETHEUS_PREFIX}/push/include")
    add_library(prometheus-cpp-push STATIC IMPORTED)
    set_target_properties(prometheus-cpp-push
            PROPERTIES IMPORTED_LOCATION "${PROMETHEUS_PUSH_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${PROMETHEUS_PREFIX}/push/include")
    add_dependencies(prometheus-cpp-push prometheus_ep)

    file(MAKE_DIRECTORY "${PROMETHEUS_PREFIX}/pull/include")
    add_library(prometheus-cpp-pull STATIC IMPORTED)
    set_target_properties(prometheus-cpp-pull
            PROPERTIES IMPORTED_LOCATION "${PROMETHEUS_PULL_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${PROMETHEUS_PREFIX}/pull/include")
    add_dependencies(prometheus-cpp-pull prometheus_ep)

    file(MAKE_DIRECTORY "${PROMETHEUS_PREFIX}/core/include")
    add_library(prometheus-cpp-core STATIC IMPORTED)
    set_target_properties(prometheus-cpp-core
            PROPERTIES IMPORTED_LOCATION "${PROMETHEUS_CORE_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${PROMETHEUS_PREFIX}/core/include")
    add_dependencies(prometheus-cpp-core prometheus_ep)
endmacro()

if(MEGASEARCH_WITH_PROMETHEUS)

    resolve_dependency(Prometheus)

    # TODO: Don't use global includes but rather target_include_directories
    #get_target_property(PROMETHEUS-core_INCLUDE_DIRS prometheus-core INTERFACE_INCLUDE_DIRECTORIES)

    #get_target_property(PROMETHEUS_PUSH_INCLUDE_DIRS prometheus_push INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${PROMETHEUS_PREFIX}/push/)
    include_directories(SYSTEM ${PROMETHEUS_PREFIX}/push/include)

    #get_target_property(PROMETHEUS_PULL_INCLUDE_DIRS prometheus_pull INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${PROMETHEUS_PREFIX}/pull/)
    include_directories(SYSTEM ${PROMETHEUS_PREFIX}/pull/include)

    link_directories(SYSTEM ${PROMETHEUS_PREFIX}/core/)
    include_directories(SYSTEM ${PROMETHEUS_PREFIX}/core/include)

    #link_directories(${PROMETHEUS_PREFIX}/civetweb_ep-prefix/src/civetweb_ep)
endif()

# ----------------------------------------------------------------------
# RocksDB

macro(build_rocksdb)
    message(STATUS "Building RocksDB-${ROCKSDB_VERSION} from source")
    set(ROCKSDB_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/rocksdb_ep-prefix/src/rocksdb_ep")
    set(ROCKSDB_INCLUDE_DIRS "${ROCKSDB_PREFIX}/include")
    set(ROCKSDB_STATIC_LIB_NAME rocksdb)
    set(ROCKSDB_STATIC_LIB
            "${ROCKSDB_PREFIX}/lib/lib/${CMAKE_STATIC_LIBRARY_PREFIX}${ROCKSDB_STATIC_LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}"
            )

    externalproject_add(rocksdb_ep
            URL
            ${ROCKSDB_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CONFIGURE_COMMAND
            ""
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            static_lib
            "prefix=${ROCKSDB_PREFIX}"
            BUILD_IN_SOURCE
            1
            INSTALL_COMMAND
            ${MAKE}
            install-static
            "INSTALL_PATH=${ROCKSDB_PREFIX}/lib"
            BUILD_BYPRODUCTS
            "${ROCKSDB_STATIC_LIB}")

    file(MAKE_DIRECTORY "${ROCKSDB_PREFIX}/include")

    add_library(rocksdb STATIC IMPORTED)
    set_target_properties(rocksdb
            PROPERTIES IMPORTED_LOCATION "${ROCKSDB_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${ROCKSDB_INCLUDE_DIRS}")
    add_dependencies(rocksdb rocksdb_ep)
endmacro()

if(MEGASEARCH_WITH_ROCKSDB)

    resolve_dependency(RocksDB)

    # TODO: Don't use global includes but rather target_include_directories
#    get_target_property(ROCKSDB_INCLUDE_DIRS rocksdb INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${ROCKSDB_PREFIX}/lib/lib/)
    include_directories(SYSTEM ${ROCKSDB_INCLUDE_DIRS})
endif()

# ----------------------------------------------------------------------
# Snappy

macro(build_snappy)
    message(STATUS "Building snappy-${SNAPPY_VERSION} from source")
    set(SNAPPY_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/snappy_ep-prefix/src/snappy_ep")
    set(SNAPPY_STATIC_LIB_NAME snappy)
    set(SNAPPY_STATIC_LIB
            "${SNAPPY_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}${SNAPPY_STATIC_LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}"
    )

    set(SNAPPY_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            -DCMAKE_INSTALL_LIBDIR=lib
            -DSNAPPY_BUILD_TESTS=OFF
            "-DCMAKE_INSTALL_PREFIX=${SNAPPY_PREFIX}")

    externalproject_add(snappy_ep
                        ${EP_LOG_OPTIONS}
                        BUILD_COMMAND
                        ${MAKE}
                        ${MAKE_BUILD_ARGS}
                        BUILD_IN_SOURCE
                        1
                        INSTALL_DIR
                        ${SNAPPY_PREFIX}
                        URL
                        ${SNAPPY_SOURCE_URL}
                        CMAKE_ARGS
                        ${SNAPPY_CMAKE_ARGS}
                        BUILD_BYPRODUCTS
                        "${SNAPPY_STATIC_LIB}")

    file(MAKE_DIRECTORY "${SNAPPY_PREFIX}/include")

    add_library(snappy STATIC IMPORTED)
    set_target_properties(snappy
                        PROPERTIES IMPORTED_LOCATION "${SNAPPY_STATIC_LIB}"
                        INTERFACE_INCLUDE_DIRECTORIES
                        "${SNAPPY_PREFIX}/include")
    add_dependencies(snappy snappy_ep)
endmacro()

if(MEGASEARCH_WITH_SNAPPY)
#    if(Snappy_SOURCE STREQUAL "AUTO")
#        # Normally *Config.cmake files reside in /usr/lib/cmake but Snappy
#        # errornously places them in ${CMAKE_ROOT}/Modules/
#        # This is fixed in 1.1.7 but fedora (30) still installs into the wrong
#        # location.
#        # https://bugzilla.redhat.com/show_bug.cgi?id=1679727
#        # https://src.fedoraproject.org/rpms/snappy/pull-request/1
#        find_package(Snappy QUIET HINTS "${CMAKE_ROOT}/Modules/")
#        if(NOT Snappy_FOUND)
#            find_package(SnappyAlt)
#        endif()
#        if(NOT Snappy_FOUND AND NOT SnappyAlt_FOUND)
#            build_snappy()
#        endif()
#    elseif(Snappy_SOURCE STREQUAL "BUNDLED")
#        build_snappy()
#    elseif(Snappy_SOURCE STREQUAL "SYSTEM")
#        # SnappyConfig.cmake is not installed on Ubuntu/Debian
#        # TODO: Make a bug report upstream
#        find_package(Snappy HINTS "${CMAKE_ROOT}/Modules/")
#        if(NOT Snappy_FOUND)
#            find_package(SnappyAlt REQUIRED)
#        endif()
#    endif()

    resolve_dependency(Snappy)

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(SNAPPY_INCLUDE_DIRS snappy INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${SNAPPY_PREFIX}/lib/)
    include_directories(SYSTEM ${SNAPPY_INCLUDE_DIRS})
endif()

# ----------------------------------------------------------------------
# SQLite

macro(build_sqlite)
    message(STATUS "Building SQLITE-${SQLITE_VERSION} from source")
    set(SQLITE_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/sqlite_ep-prefix/src/sqlite_ep")
    set(SQLITE_INCLUDE_DIR "${SQLITE_PREFIX}/include")
    set(SQLITE_STATIC_LIB
            "${SQLITE_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}sqlite3${CMAKE_STATIC_LIBRARY_SUFFIX}")

    set(SQLITE_CONFIGURE_ARGS
            "--prefix=${SQLITE_PREFIX}"
            "CC=${CMAKE_C_COMPILER}"
            "CXX=${CMAKE_CXX_COMPILER}"
            "CFLAGS=${EP_C_FLAGS}"
            "CXXFLAGS=${EP_CXX_FLAGS}")

    externalproject_add(sqlite_ep
            URL
            ${SQLITE_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            CONFIGURE_COMMAND
            "./configure"
            ${SQLITE_CONFIGURE_ARGS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_IN_SOURCE
            1
            BUILD_BYPRODUCTS
            "${SQLITE_STATIC_LIB}")

    file(MAKE_DIRECTORY "${SQLITE_INCLUDE_DIR}")
    add_library(sqlite STATIC IMPORTED)
    set_target_properties(
            sqlite
            PROPERTIES IMPORTED_LOCATION "${SQLITE_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${SQLITE_INCLUDE_DIR}")

    add_dependencies(sqlite sqlite_ep)
endmacro()

if(MEGASEARCH_WITH_SQLITE)
    resolve_dependency(SQLite)
    include_directories(SYSTEM "${SQLITE_INCLUDE_DIR}")
    link_directories(SYSTEM ${SQLITE_PREFIX}/lib/)
endif()

# ----------------------------------------------------------------------
# SQLite_ORM

macro(build_sqlite_orm)
    message(STATUS "Building SQLITE_ORM-${SQLITE_ORM_VERSION} from source")

    set(SQLITE_ORM_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/sqlite_orm_ep-prefix")
    set(SQLITE_ORM_TAR_NAME "${SQLITE_ORM_PREFIX}/sqlite_orm-${SQLITE_ORM_VERSION}.tar.gz")    #sqlite_orm-${SQLITE_ORM_VERSION}.tar.gz
    if (NOT EXISTS ${SQLITE_ORM_TAR_NAME})
        file(MAKE_DIRECTORY ${SQLITE_ORM_PREFIX})
        file(DOWNLOAD https://github.com/fnc12/sqlite_orm/archive/${SQLITE_ORM_VERSION}.tar.gz
                ${SQLITE_ORM_TAR_NAME})
        execute_process(COMMAND ${CMAKE_COMMAND} -E tar -xf ${SQLITE_ORM_TAR_NAME}
                        WORKING_DIRECTORY ${SQLITE_ORM_PREFIX})

    endif ()
    set(SQLITE_ORM_INCLUDE_DIR "${SQLITE_ORM_PREFIX}/sqlite_orm-${SQLITE_ORM_VERSION}/include/sqlite_orm")

    #set(SQLITE_ORM_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/sqlite_orm_ep-prefix/src/sqlite_orm_ep")
    #set(SQLITE_ORM_INCLUDE_DIR "${SQLITE_ORM_PREFIX}/include/sqlite_orm")

#    set(SQLITE_ORM_STATIC_LIB
#            "${SQLITE_ORM_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}sqlite_orm${CMAKE_STATIC_LIBRARY_SUFFIX}")
#
#    set(SQLITE_ORM_CMAKE_CXX_FLAGS "${EP_CXX_FLAGS} -std=c++14")
#    set(SQLITE_ORM_CMAKE_CXX_FLAGS_DEBUG "${EP_CXX_FLAGS} -std=c++14")
#
#    set(SQLITE_ORM_CMAKE_ARGS
#            ${EP_COMMON_CMAKE_ARGS}
#            "-DCMAKE_INSTALL_PREFIX=${SQLITE_ORM_PREFIX}"
#            #"LDFLAGS=-L${SQLITE_PREFIX}"
#            #"-DCMAKE_PREFIX_PATH=${SQLITE_PREFIX}/include"
#            "-DCMAKE_INCLUDE_PATH=${SQLITE_PREFIX}/include"
#            "-DCMAKE_CXX_FLAGS=${SQLITE_ORM_CMAKE_CXX_FLAGS}"
#            "-DCMAKE_CXX_FLAGS_DEBUG=${SQLITE_ORM_CMAKE_CXX_FLAGS}"
#            -DSqliteOrm_BuildTests=off
#            -DBUILD_TESTING=off)
#    message(STATUS "SQLITE_INCLUDE: ${SQLITE_ORM_CMAKE_ARGS}")
#
#        message(STATUS "SQLITE_ORM_CMAKE_CXX_FLAGS: ${SQLITE_ORM_CMAKE_CXX_FLAGS}")

#    externalproject_add(sqlite_orm_ep
#            URL
#            ${SQLITE_ORM_SOURCE_URL}
#            PREFIX ${CMAKE_CURRENT_BINARY_DIR}/sqlite_orm_ep-prefix
#            CONFIGURE_COMMAND
#            ""
#            BUILD_COMMAND
#            ""
#            INSTALL_COMMAND
#            ""
            #${EP_LOG_OPTIONS}
            #${EP_LOG_OPTIONS}
#            CMAKE_ARGS
#            ${SQLITE_ORM_CMAKE_ARGS}
#            BUILD_COMMAND
#            ${MAKE}
#            ${MAKE_BUILD_ARGS}
#            #"LDFLAGS=-L${SQLITE_PREFIX}"
#            BUILD_IN_SOURCE
#            1
#            BUILD_BYPRODUCTS
#            "${SQLITE_ORM_STATIC_LIB}"
#            )
#    ExternalProject_Add_StepDependencies(sqlite_orm_ep build sqlite_ep)

    #set(SQLITE_ORM_SQLITE_HEADER ${SQLITE_INCLUDE_DIR}/sqlite3.h)
#    file(MAKE_DIRECTORY "${SQLITE_ORM_INCLUDE_DIR}")
#    add_library(sqlite_orm STATIC IMPORTED)
##    message(STATUS "SQLITE_INCLUDE_DIR: ${SQLITE_INCLUDE_DIR}")
#    set_target_properties(
#            sqlite_orm
#            PROPERTIES
#            IMPORTED_LOCATION "${SQLITE_ORM_STATIC_LIB}"
#            INTERFACE_INCLUDE_DIRECTORIES "${SQLITE_ORM_INCLUDE_DIR};${SQLITE_INCLUDE_DIR}")
#    target_include_directories(sqlite_orm INTERFACE ${SQLITE_PREFIX} ${SQLITE_INCLUDE_DIR})
#    target_link_libraries(sqlite_orm INTERFACE sqlite)
#
#    add_dependencies(sqlite_orm sqlite_orm_ep)
endmacro()

if(MEGASEARCH_WITH_SQLITE_ORM)
    resolve_dependency(SQLite_ORM)
#    ExternalProject_Get_Property(sqlite_orm_ep source_dir)
#    set(SQLITE_ORM_INCLUDE_DIR ${source_dir}/sqlite_orm_ep)
    include_directories(SYSTEM "${SQLITE_ORM_INCLUDE_DIR}")
    #message(STATUS "SQLITE_ORM_INCLUDE_DIR: ${SQLITE_ORM_INCLUDE_DIR}")
endif()

# ----------------------------------------------------------------------
# Thrift

macro(build_thrift)
    message(STATUS "Building Apache Thrift-${THRIFT_VERSION} from source")
    set(THRIFT_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/thrift_ep-prefix/src/thrift_ep")
    set(THRIFT_INCLUDE_DIR "${THRIFT_PREFIX}/include")
    set(THRIFT_COMPILER "${THRIFT_PREFIX}/bin/thrift")
    set(THRIFT_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            "-DCMAKE_INSTALL_PREFIX=${THRIFT_PREFIX}"
            "-DCMAKE_INSTALL_RPATH=${THRIFT_PREFIX}/lib"
            -DBUILD_SHARED_LIBS=OFF
            -DBUILD_TESTING=OFF
            -DBUILD_EXAMPLES=OFF
            -DBUILD_TUTORIALS=OFF
            -DWITH_QT4=OFF
            -DWITH_C_GLIB=OFF
            -DWITH_JAVA=OFF
            -DWITH_PYTHON=OFF
            -DWITH_HASKELL=OFF
            -DWITH_CPP=ON
            -DWITH_STATIC_LIB=ON
            -DWITH_LIBEVENT=OFF
            -DCMAKE_BUILD_TYPE=Release)

    # Thrift also uses boost. Forward important boost settings if there were ones passed.
    if(DEFINED BOOST_ROOT)
        set(THRIFT_CMAKE_ARGS ${THRIFT_CMAKE_ARGS} "-DBOOST_ROOT=${BOOST_ROOT}")
    endif()
    if(DEFINED Boost_NAMESPACE)
        set(THRIFT_CMAKE_ARGS ${THRIFT_CMAKE_ARGS} "-DBoost_NAMESPACE=${Boost_NAMESPACE}")
    endif()

    set(THRIFT_STATIC_LIB_NAME "${CMAKE_STATIC_LIBRARY_PREFIX}thrift")
    if(MSVC)
        if(MEGASEARCH_USE_STATIC_CRT)
            set(THRIFT_STATIC_LIB_NAME "${THRIFT_STATIC_LIB_NAME}")
            set(THRIFT_CMAKE_ARGS ${THRIFT_CMAKE_ARGS} "-DWITH_MT=ON")
        else()
            set(THRIFT_STATIC_LIB_NAME "${THRIFT_STATIC_LIB_NAME}")
            set(THRIFT_CMAKE_ARGS ${THRIFT_CMAKE_ARGS} "-DWITH_MT=OFF")
        endif()
    endif()
    if(${UPPERCASE_BUILD_TYPE} STREQUAL "DEBUG")
        set(THRIFT_STATIC_LIB_NAME "${THRIFT_STATIC_LIB_NAME}")
    endif()
    set(THRIFT_STATIC_LIB
            "${THRIFT_PREFIX}/lib/${THRIFT_STATIC_LIB_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")

    if(ZLIB_SHARED_LIB)
        set(THRIFT_CMAKE_ARGS "-DZLIB_LIBRARY=${ZLIB_SHARED_LIB}" ${THRIFT_CMAKE_ARGS})
    else()
        set(THRIFT_CMAKE_ARGS "-DZLIB_LIBRARY=${ZLIB_STATIC_LIB}" ${THRIFT_CMAKE_ARGS})
    endif()
    set(THRIFT_DEPENDENCIES ${THRIFT_DEPENDENCIES} ${ZLIB_LIBRARY})

    if(MSVC)
        set(WINFLEXBISON_VERSION 2.4.9)
        set(WINFLEXBISON_PREFIX
                "${CMAKE_CURRENT_BINARY_DIR}/winflexbison_ep/src/winflexbison_ep-install")
        externalproject_add(
                winflexbison_ep
                URL
                https://github.com/lexxmark/winflexbison/releases/download/v.${WINFLEXBISON_VERSION}/win_flex_bison-${WINFLEXBISON_VERSION}.zip
                URL_HASH
                MD5=a2e979ea9928fbf8567e995e9c0df765
                SOURCE_DIR
                ${WINFLEXBISON_PREFIX}
                CONFIGURE_COMMAND
                ""
                BUILD_COMMAND
                ""
                INSTALL_COMMAND
                ""
                ${EP_LOG_OPTIONS})
        set(THRIFT_DEPENDENCIES ${THRIFT_DEPENDENCIES} winflexbison_ep)

        set(THRIFT_CMAKE_ARGS
                "-DFLEX_EXECUTABLE=${WINFLEXBISON_PREFIX}/win_flex.exe"
                "-DBISON_EXECUTABLE=${WINFLEXBISON_PREFIX}/win_bison.exe"
                "-DZLIB_INCLUDE_DIR=${ZLIB_INCLUDE_DIR}"
                "-DWITH_SHARED_LIB=OFF"
                "-DWITH_PLUGIN=OFF"
                ${THRIFT_CMAKE_ARGS})
    elseif(APPLE)
        # Some other process always resets BISON_EXECUTABLE to the system default,
        # thus we use our own variable here.
        if(NOT DEFINED THRIFT_BISON_EXECUTABLE)
            find_package(BISON 2.5.1)

            # In the case where we cannot find a system-wide installation, look for
            # homebrew and ask for its bison installation.
            if(NOT BISON_FOUND)
                find_program(BREW_BIN brew)
                if(BREW_BIN)
                    execute_process(COMMAND ${BREW_BIN} --prefix bison
                            OUTPUT_VARIABLE BISON_PREFIX
                            OUTPUT_STRIP_TRAILING_WHITESPACE)
                    set(BISON_EXECUTABLE "${BISON_PREFIX}/bin/bison")
                    find_package(BISON 2.5.1)
                    set(THRIFT_BISON_EXECUTABLE "${BISON_EXECUTABLE}")
                endif()
            else()
                set(THRIFT_BISON_EXECUTABLE "${BISON_EXECUTABLE}")
            endif()
        endif()
        set(THRIFT_CMAKE_ARGS "-DBISON_EXECUTABLE=${THRIFT_BISON_EXECUTABLE}"
                ${THRIFT_CMAKE_ARGS})
    endif()

    externalproject_add(thrift_ep
            URL
            ${THRIFT_SOURCE_URL}
            BUILD_BYPRODUCTS
            "${THRIFT_STATIC_LIB}"
            "${THRIFT_COMPILER}"
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            CMAKE_ARGS
            ${THRIFT_CMAKE_ARGS}
            DEPENDS
            ${THRIFT_DEPENDENCIES}
            ${EP_LOG_OPTIONS})

    add_library(thrift STATIC IMPORTED)
    # The include directory must exist before it is referenced by a target.
    file(MAKE_DIRECTORY "${THRIFT_INCLUDE_DIR}")
    set_target_properties(thrift
            PROPERTIES IMPORTED_LOCATION "${THRIFT_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${THRIFT_INCLUDE_DIR}")
    add_dependencies(thrift thrift_ep)
endmacro()

if(MEGASEARCH_WITH_THRIFT)
    resolve_dependency(Thrift)
    # TODO: Don't use global includes but rather target_include_directories
#    MESSAGE(STATUS ${THRIFT_PREFIX}/lib/)
    link_directories(SYSTEM ${THRIFT_PREFIX}/lib/)
    include_directories(SYSTEM ${THRIFT_INCLUDE_DIR})
endif()

# ----------------------------------------------------------------------
# yaml-cpp

macro(build_yamlcpp)
    message(STATUS "Building yaml-cpp-${YAMLCPP_VERSION} from source")
    set(YAMLCPP_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/yaml-cpp_ep-prefix/src/yaml-cpp_ep")
    set(YAMLCPP_STATIC_LIB "${YAMLCPP_PREFIX}/lib/${CMAKE_STATIC_LIBRARY_PREFIX}yaml-cpp${CMAKE_STATIC_LIBRARY_SUFFIX}")
    set(YAMLCPP_CMAKE_ARGS
            ${EP_COMMON_CMAKE_ARGS}
            "-DCMAKE_INSTALL_PREFIX=${YAMLCPP_PREFIX}"
            -DCMAKE_INSTALL_LIBDIR=lib
            -DYAML_CPP_BUILD_TESTS=OFF
            -DYAML_CPP_BUILD_TOOLS=OFF)

    externalproject_add(yaml-cpp_ep
            URL
            ${YAMLCPP_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_BYPRODUCTS
            "${YAMLCPP_STATIC_LIB}"
            CMAKE_ARGS
            ${YAMLCPP_CMAKE_ARGS})

    file(MAKE_DIRECTORY "${YAMLCPP_PREFIX}/include")

    add_library(yaml-cpp STATIC IMPORTED)
    set_target_properties(yaml-cpp
            PROPERTIES IMPORTED_LOCATION "${YAMLCPP_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${YAMLCPP_PREFIX}/include")

    add_dependencies(yaml-cpp yaml-cpp_ep)
endmacro()

if(MEGASEARCH_WITH_YAMLCPP)
    resolve_dependency(yaml-cpp)

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(YAMLCPP_INCLUDE_DIR yaml-cpp INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${YAMLCPP_PREFIX}/lib/)
    include_directories(SYSTEM ${YAMLCPP_INCLUDE_DIR})
endif()

# ----------------------------------------------------------------------
# zlib

macro(build_zlib)
    message(STATUS "Building ZLIB-${ZLIB_VERSION} from source")
    set(ZLIB_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/zlib_ep-prefix/src/zlib_ep")
    if(MSVC)
        if(${UPPERCASE_BUILD_TYPE} STREQUAL "DEBUG")
            set(ZLIB_STATIC_LIB_NAME zlibstaticd.lib)
        else()
            set(ZLIB_STATIC_LIB_NAME zlibstatic.lib)
        endif()
    else()
        set(ZLIB_STATIC_LIB_NAME libz.a)
    endif()
    set(ZLIB_STATIC_LIB "${ZLIB_PREFIX}/lib/${ZLIB_STATIC_LIB_NAME}")
    set(ZLIB_CMAKE_ARGS ${EP_COMMON_CMAKE_ARGS} "-DCMAKE_INSTALL_PREFIX=${ZLIB_PREFIX}"
            -DBUILD_SHARED_LIBS=OFF)

    externalproject_add(zlib_ep
            URL
            ${ZLIB_SOURCE_URL}
            ${EP_LOG_OPTIONS}
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            BUILD_BYPRODUCTS
            "${ZLIB_STATIC_LIB}"
            CMAKE_ARGS
            ${ZLIB_CMAKE_ARGS})

    file(MAKE_DIRECTORY "${ZLIB_PREFIX}/include")

    add_library(zlib STATIC IMPORTED)
    set_target_properties(zlib
            PROPERTIES IMPORTED_LOCATION "${ZLIB_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_PREFIX}/include")

    add_dependencies(zlib zlib_ep)
endmacro()

if(MEGASEARCH_WITH_ZLIB)
    resolve_dependency(ZLIB)

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(ZLIB_INCLUDE_DIR zlib INTERFACE_INCLUDE_DIRECTORIES)
    include_directories(SYSTEM ${ZLIB_INCLUDE_DIR})
endif()

# ----------------------------------------------------------------------
# zstd

macro(build_zstd)
    message(STATUS "Building zstd-${ZSTD_VERSION} from source")
    set(ZSTD_PREFIX "${CMAKE_CURRENT_BINARY_DIR}/zstd_ep-prefix/src/zstd_ep")

    set(ZSTD_CMAKE_ARGS
            ${EP_COMMON_TOOLCHAIN}
            "-DCMAKE_INSTALL_PREFIX=${ZSTD_PREFIX}"
            -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
            -DCMAKE_INSTALL_LIBDIR=lib #${CMAKE_INSTALL_LIBDIR}
            -DZSTD_BUILD_PROGRAMS=off
            -DZSTD_BUILD_SHARED=off
            -DZSTD_BUILD_STATIC=on
            -DZSTD_MULTITHREAD_SUPPORT=off)

    if(MSVC)
        set(ZSTD_STATIC_LIB "${ZSTD_PREFIX}/lib/zstd_static.lib")
        if(MEGASEARCH_USE_STATIC_CRT)
            set(ZSTD_CMAKE_ARGS ${ZSTD_CMAKE_ARGS} "-DZSTD_USE_STATIC_RUNTIME=on")
        endif()
    else()
        set(ZSTD_STATIC_LIB "${ZSTD_PREFIX}/lib/libzstd.a")
        # Only pass our C flags on Unix as on MSVC it leads to a
        # "incompatible command-line options" error
        set(ZSTD_CMAKE_ARGS
                ${ZSTD_CMAKE_ARGS}
                -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
                -DCMAKE_CXX_COMPILER=${CMAKE_CXX_COMPILER}
                -DCMAKE_C_FLAGS=${EP_C_FLAGS}
                -DCMAKE_CXX_FLAGS=${EP_CXX_FLAGS})
    endif()

    if(CMAKE_VERSION VERSION_LESS 3.7)
        message(FATAL_ERROR "Building zstd using ExternalProject requires at least CMake 3.7")
    endif()

    externalproject_add(zstd_ep
            ${EP_LOG_OPTIONS}
            CMAKE_ARGS
            ${ZSTD_CMAKE_ARGS}
            SOURCE_SUBDIR
            "build/cmake"
            BUILD_COMMAND
            ${MAKE}
            ${MAKE_BUILD_ARGS}
            INSTALL_DIR
            ${ZSTD_PREFIX}
            URL
            ${ZSTD_SOURCE_URL}
            BUILD_BYPRODUCTS
            "${ZSTD_STATIC_LIB}")

    file(MAKE_DIRECTORY "${ZSTD_PREFIX}/include")

    add_library(zstd STATIC IMPORTED)
    set_target_properties(zstd
            PROPERTIES IMPORTED_LOCATION "${ZSTD_STATIC_LIB}"
            INTERFACE_INCLUDE_DIRECTORIES "${ZSTD_PREFIX}/include")

    add_dependencies(zstd zstd_ep)
endmacro()

if(MEGASEARCH_WITH_ZSTD)
    resolve_dependency(ZSTD)

    # TODO: Don't use global includes but rather target_include_directories
    get_target_property(ZSTD_INCLUDE_DIR zstd INTERFACE_INCLUDE_DIRECTORIES)
    link_directories(SYSTEM ${ZSTD_PREFIX}/lib)
    include_directories(SYSTEM ${ZSTD_INCLUDE_DIR})
endif()