CMakeLists.txt

cmake_minimum_required(VERSION 3.16)

project(ceph
  VERSION 19.0.0
  LANGUAGES CXX C ASM)

foreach(policy CMP0127 CMP0135)
  if(POLICY ${policy})
    cmake_policy(SET ${policy} NEW)
  endif()
endforeach()

list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules/")

if(NOT CMAKE_BUILD_TYPE)
  if (EXISTS "${CMAKE_SOURCE_DIR}/.git")
    message(WARNING "CMAKE_BUILD_TYPE not specified, assuming CMAKE_BUILD_TYPE=Debug because .git exists.")
    set(default_build_type "Debug")
    set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
        STRING "Default BUILD_TYPE is Debug, other options are: RelWithDebInfo, Release, and MinSizeRel." FORCE)
  else()
    message(WARNING "CMAKE_BUILD_TYPE not specified, leaving unset because .git does NOT exist.")
  endif()
endif()

if(CMAKE_SYSTEM_NAME MATCHES "Linux")
  set(LINUX ON)
  FIND_PACKAGE(Threads)
elseif(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
  set(FREEBSD ON)
  FIND_PACKAGE(Threads)
endif(CMAKE_SYSTEM_NAME MATCHES "Linux")

if(WIN32)
  # The Windows headers (e.g. coming from mingw or the Windows SDK) check
  # the targeted Windows version. The availability of certain functions and
  # structures will depend on it.
  set(WIN32_WINNT "0x0A00" CACHE STRING "Targeted Windows version.")
  add_definitions(
    -D_WIN32_WINNT=${WIN32_WINNT}
    -DFMT_USE_TZSET=0
  )
  # In order to avoid known winpthread issues, we're using the Boost
  # shared mutex implementation. This isn't required with llvm/libc++.
  # https://github.com/msys2/MINGW-packages/issues/3319
  if(CMAKE_CXX_COMPILER_ID STREQUAL GNU)
    add_definitions(
      -DBOOST_THREAD_PROVIDES_GENERIC_SHARED_MUTEX_ON_WIN
      -DBOOST_THREAD_V2_SHARED_MUTEX
    )
  endif()
  set(Boost_THREADAPI "win32")
endif()

if(MINGW)
  string(APPEND CMAKE_SHARED_LINKER_FLAGS " -Wl,-allow-multiple-definition")
  string(APPEND CMAKE_EXE_LINKER_FLAGS " -Wl,-allow-multiple-definition")

  # By default, cmake generates import libs for executables. The issue is that
  # for rados and rbd, the executable import lib overrides the library import lib.
  # For example, for rados.exe, it will end up generating a librados.dll.a import lib.
  # We're providing custom rules to disable import libs for executables.
  set(CMAKE_C_LINK_EXECUTABLE
    "<CMAKE_C_COMPILER> <FLAGS> <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES>")
  set(CMAKE_CXX_LINK_EXECUTABLE
    "<CMAKE_CXX_COMPILER> <FLAGS> <CMAKE_CXX_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> ${CMAKE_GNULD_IMAGE_VERSION} <LINK_LIBRARIES>")

  link_directories(${MINGW_LINK_DIRECTORIES})
endif()

option(WITH_CCACHE "Build with ccache.")
if(WITH_CCACHE)
  if(CMAKE_C_COMPILER_LAUNCHER OR CMAKE_CXX_COMPILER_LAUNCHER)
    message(WARNING "Compiler launcher already set. stop configuring ccache")
  else()
    find_program(CCACHE_EXECUTABLE ccache)
    if(NOT CCACHE_EXECUTABLE)
      message(FATAL_ERROR "Can't find ccache. Is it installed?")
    endif()
    message(STATUS "Building with ccache: ${CCACHE_EXECUTABLE}, CCACHE_DIR=$ENV{CCACHE_DIR}")
    set(CMAKE_C_COMPILER_LAUNCHER ${CCACHE_EXECUTABLE})
    set(CMAKE_CXX_COMPILER_LAUNCHER ${CCACHE_EXECUTABLE})
  endif()
endif(WITH_CCACHE)

option(WITH_SCCACHE "Build with sccache.")
if(WITH_SCCACHE)
  find_program(SCCACHE_EXECUTABLE sccache)
  if(NOT SCCACHE_EXECUTABLE)
    message(FATAL_ERROR "Can't find sccache. Is it installed?")
  endif()
  if(NOT NINJA_MAX_COMPILE_JOBS)
    if(CMAKE_VERSION VERSION_GREATER_EQUAL "3.19")
      execute_process(
        COMMAND "sccache" "--dist-status"
        OUTPUT_VARIABLE sccache_dist_status
      )
      string(
        JSON sccache_cores
        ERROR_VARIABLE sccache_dist_status_error
        GET "${sccache_dist_status}" SchedulerStatus 1 num_cpus
      )
      string(FIND "${sccache_dist_status}" "disabled" find_result)
      if(find_result EQUAL -1)
        message(STATUS "Using sccache with distributed compilation. Effective cores: ${sccache_cores}")
        set(NINJA_MAX_COMPILE_JOBS ${sccache_cores})
        set(NINJA_MAX_LINK_JOBS ${sccache_cores})
      else()
        message(WARNING "Using sccache, but it is not configured for distributed complilation")
      endif()
    else()
      message(WARNING "Using sccache, but cannot determine maximum job value since cmake version is <3.19")
    endif()
  endif()
  message(STATUS "Building with sccache: ${SCCACHE_EXECUTABLE}, SCCACHE_CONF=$ENV{SCCACHE_CONF}")
  set(CMAKE_C_COMPILER_LAUNCHER ${SCCACHE_EXECUTABLE})
  set(CMAKE_CXX_COMPILER_LAUNCHER ${SCCACHE_EXECUTABLE})
endif(WITH_SCCACHE)

option(WITH_MANPAGE "Build man pages." ON)
if(WITH_MANPAGE)
  find_program(SPHINX_BUILD
    NAMES sphinx-build sphinx-build-3)
  if(NOT SPHINX_BUILD)
    message(FATAL_ERROR "Can't find sphinx-build.")
  endif(NOT SPHINX_BUILD)
endif(WITH_MANPAGE)

include_directories(
  ${PROJECT_BINARY_DIR}/src/include
  ${PROJECT_SOURCE_DIR}/src)

if(WIN32)
  include_directories(
    ${PROJECT_SOURCE_DIR}/src/include/win32)
  # Boost complains if winsock2.h (or windows.h) is included before asio.hpp.
  add_compile_options("SHELL:-include winsock_wrapper.h")
  # Boost is also defining some of the errno values, we'll have
  # to avoid mismatches.
  add_compile_options("SHELL:-include win32_errno.h")
endif()

if(FREEBSD)
  include_directories(SYSTEM /usr/local/include)
  link_directories(/usr/local/lib)
  list(APPEND CMAKE_REQUIRED_INCLUDES /usr/local/include)
endif(FREEBSD)


#put all the libs and binaries in one place
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)

include(GNUInstallDirs)
include(CephChecks)
if(CMAKE_GENERATOR MATCHES Ninja)
  include(LimitJobs)
endif()

set(CEPH_MAN_DIR "share/man" CACHE STRING "Install location for man pages (relative to prefix).")

option(ENABLE_SHARED "build shared libraries" ON)
if(ENABLE_SHARED)
  set(CEPH_SHARED SHARED)
else(ENABLE_SHARED)
  set(CEPH_SHARED STATIC)
endif(ENABLE_SHARED)
set(CMAKE_POSITION_INDEPENDENT_CODE ${ENABLE_SHARED})

option(WITH_STATIC_LIBSTDCXX "Link against libstdc++ statically" OFF)
if(WITH_STATIC_LIBSTDCXX)
  if(NOT CMAKE_COMPILER_IS_GNUCXX)
    message(FATAL_ERROR "Please use GCC to enable WITH_STATIC_LIBSTDCXX")
  endif()
  set(static_linker_flags "-static-libstdc++ -static-libgcc")
  string(APPEND CMAKE_SHARED_LINKER_FLAGS " ${static_linker_flags}")
  string(APPEND CMAKE_EXE_LINKER_FLAGS " ${static_linker_flags}")
  unset(static_linker_flags)
  set(GPERFTOOLS_USE_STATIC_LIBS TRUE)
endif()
include(CheckCxxAtomic)
if(NOT HAVE_CXX11_ATOMIC)
  string(APPEND CMAKE_CXX_STANDARD_LIBRARIES
    " ${LIBATOMIC_LINK_FLAGS}")
endif()

option(WITH_RDMA "Enable RDMA in async messenger" ON)
if(WITH_RDMA)
  find_package(verbs REQUIRED)
  set(HAVE_VERBS ${VERBS_FOUND})
  find_package(rdmacm REQUIRED)
  set(HAVE_RDMACM ${RDMACM_FOUND})
  set(HAVE_RDMA TRUE)
endif()

find_package(Backtrace)

option(WITH_RBD "Enable RADOS Block Device related targets" ON)

if(LINUX)
  find_package(udev REQUIRED)
  set(HAVE_UDEV ${UDEV_FOUND})
  find_package(blkid REQUIRED)
  set(HAVE_BLKID ${BLKID_FOUND})
  find_package(keyutils REQUIRED)
  set(HAVE_KEYUTILS ${KEYUTILS_FOUND})
elseif(FREEBSD)
  set(HAVE_UDEV OFF)
  set(HAVE_LIBAIO OFF)
  set(HAVE_LIBDML OFF)
  set(HAVE_BLKID OFF)
  set(HAVE_KEYUTILS OFF)
else()
  set(HAVE_UDEV OFF)
  set(HAVE_BLKID OFF)
endif(LINUX)

option(WITH_OPENLDAP "OPENLDAP is here" ON)
if(WITH_OPENLDAP)
  find_package(OpenLDAP REQUIRED)
  set(HAVE_OPENLDAP ${OpenLDAP_FOUND})
endif()

option(WITH_GSSAPI "GSSAPI/KRB5 is here" OFF)
if(WITH_GSSAPI)
  find_package(GSSApi REQUIRED)
  set(HAVE_GSSAPI ${GSSApi_FOUND})
endif()

option(WITH_FUSE "Fuse is here" ON)
if(WITH_FUSE)
  find_package(FUSE REQUIRED)
  set(HAVE_LIBFUSE ${FUSE_FOUND})
endif()

option(WITH_DOKAN "Dokan is here" OFF)

option(WITH_XFS "XFS is here" ON)
if(WITH_XFS)
  find_package(xfs)
  set(HAVE_LIBXFS ${XFS_FOUND})
endif()

option(WITH_BLUESTORE "Bluestore OSD backend" ON)
if(WITH_BLUESTORE)
  if(LINUX)
    find_package(aio)
    set(HAVE_LIBAIO ${AIO_FOUND})
  elseif(FREEBSD)
    # POSIX AIO is integrated into FreeBSD kernel, and exposed by libc.
    set(HAVE_POSIXAIO ON)
  endif()
endif()

# libcryptsetup is only available on linux
if(WITH_RBD AND LINUX)
  find_package(libcryptsetup 2.0.5 REQUIRED)
  set(HAVE_LIBCRYPTSETUP ${LIBCRYPTSETUP_FOUND})
endif()

include(CMakeDependentOption)

CMAKE_DEPENDENT_OPTION(WITH_LIBURING "Enable io_uring bluestore backend" ON
  "WITH_BLUESTORE;HAVE_LIBAIO" OFF)
set(HAVE_LIBURING ${WITH_LIBURING})

CMAKE_DEPENDENT_OPTION(WITH_SYSTEM_LIBURING "Require and build with system liburing" OFF
  "HAVE_LIBAIO;WITH_BLUESTORE" OFF)

if(WITH_LIBURING)
  if(WITH_SYSTEM_LIBURING)
    find_package(uring REQUIRED)
  else()
    include(Builduring)
    build_uring()
  endif()
  # enable uring in boost::asio

  if(CMAKE_SYSTEM_VERSION VERSION_GREATER_EQUAL "5.10")
    add_compile_definitions("BOOST_ASIO_HAS_IO_URING")
  endif()
endif()

CMAKE_DEPENDENT_OPTION(WITH_BLUESTORE_PMEM "Enable PMDK libraries" OFF
  "WITH_BLUESTORE" OFF)
if(WITH_BLUESTORE_PMEM)
  find_package(dml)
  set(HAVE_LIBDML ${DML_FOUND})
endif()

CMAKE_DEPENDENT_OPTION(WITH_RBD_MIRROR "Enable build for rbd-mirror daemon executable" OFF
    "WITH_RBD" OFF)

CMAKE_DEPENDENT_OPTION(WITH_RBD_MIGRATION_FORMAT_QCOW_V1
  "Enable librbd QCOW v1 migration format support" ON
  "WITH_RBD" OFF)

CMAKE_DEPENDENT_OPTION(WITH_RBD_RWL "Enable librbd persistent write back cache" OFF
  "WITH_RBD" OFF)

CMAKE_DEPENDENT_OPTION(WITH_RBD_SSD_CACHE "Enable librbd persistent write back cache for SSDs" OFF
    "WITH_RBD" OFF)

CMAKE_DEPENDENT_OPTION(WITH_SYSTEM_PMDK "Require and build with system PMDK" OFF
  "WITH_RBD_RWL OR WITH_BLUESTORE_PMEM" OFF)

CMAKE_DEPENDENT_OPTION(WITH_RBD_UBBD "Enable ubbd support for rbd device utility" OFF
    "WITH_RBD" OFF)

if(WITH_RBD_UBBD)
  include(BuildUBBD)
  build_ubbd()
endif()

if(WITH_BLUESTORE_PMEM)
  set(HAVE_BLUESTORE_PMEM ON)
endif()

CMAKE_DEPENDENT_OPTION(WITH_SPDK "Enable SPDK" OFF
  "CMAKE_SYSTEM_PROCESSOR MATCHES i386|i686|amd64|x86_64|AMD64|aarch64" OFF)
if(WITH_SPDK)
  if(NOT WITH_BLUESTORE)
    message(SEND_ERROR "Please enable WITH_BLUESTORE for using SPDK")
  endif()
  include(BuildSPDK)
  build_spdk()
  set(HAVE_SPDK TRUE)
endif(WITH_SPDK)

if(WITH_BLUESTORE)
  if(NOT AIO_FOUND AND NOT HAVE_POSIXAIO AND NOT WITH_SPDK AND NOT WITH_BLUESTORE_PMEM)
    message(SEND_ERROR "WITH_BLUESTORE is ON, "
      "but none of the bluestore backends is enabled. "
      "Please install libaio, or enable WITH_SPDK or WITH_BLUESTORE_PMEM (experimental)")
  endif()
endif()

option(WITH_BLUEFS "libbluefs library" OFF)

CMAKE_DEPENDENT_OPTION(WITH_QATLIB "Enable QAT with qatlib" ON
  "CMAKE_SYSTEM_PROCESSOR MATCHES amd64|x86_64|AMD64" OFF)
option(WITH_SYSTEM_QATLIB "Use system packages for qatlib" OFF)
option(WITH_QATDRV "Enable QAT with out-of-tree driver" OFF)
CMAKE_DEPENDENT_OPTION(WITH_QATZIP "Enable QATzip" ON
  "CMAKE_SYSTEM_PROCESSOR MATCHES amd64|x86_64|AMD64" OFF)
option(WITH_SYSTEM_QATZIP "Use system packages for QATzip" OFF)

if(WITH_QATDRV)
  find_package(QatDrv REQUIRED COMPONENTS qat_s usdm_drv_s)
  set(HAVE_QAT TRUE)
elseif(WITH_QATLIB)
  if(NOT WITH_SYSTEM_QAT)
    include(BuildQAT)
    build_qat()
  endif()
  find_package(QAT REQUIRED)
  if(NOT WITH_SYSTEM_QAT)
    add_dependencies(QAT::qat qatlib_ext)
    add_dependencies(QAT::usdm qatlib_ext)
  endif()
  set(HAVE_QAT TRUE)
endif()

if(WITH_QATZIP)
  if(NOT HAVE_QAT)
    message(FATAL_ERROR "WITH_QATZIP requires WITH_QATLIB or WITH_QATDRV")
  endif()
  if(NOT WITH_SYSTEM_QATZIP)
    include(BuildQATzip)
    build_qatzip()
    # qatzip build depends on qatlib
    add_dependencies(qatzip_ext QAT::qat)
  endif()
  find_package(QATzip REQUIRED)
  if(NOT WITH_SYSTEM_QATZIP)
    add_dependencies(QAT::zip qatzip_ext)
  endif()
  set(HAVE_QATZIP TRUE)
endif(WITH_QATZIP)

CMAKE_DEPENDENT_OPTION(WITH_UADK "Enable UADK" ON
        "CMAKE_SYSTEM_PROCESSOR MATCHES aarch64" OFF)
if(WITH_UADK)
  include(Builduadk)
  build_uadk()
  set(HAVE_UADK TRUE)
  message("HAVE_UADK " ${HAVE_UADK})
endif(WITH_UADK)

# needs mds and? XXX
option(WITH_LIBCEPHFS "libcephfs client library" ON)

option(WITH_LIBCEPHSQLITE "libcephsqlite client library" ON)
if(WITH_LIBCEPHSQLITE)
  find_package(SQLite3 REQUIRED)
endif()

# key-value store
option(WITH_KVS "Key value store is here" OFF)

option(WITH_KRBD "Enable Linux krbd support of 'rbd' utility" ON)

if(WITH_KRBD AND NOT WITH_RBD)
  message(FATAL_ERROR "Cannot have WITH_KRBD without WITH_RBD.")
endif()
if(LINUX)
  if(WITH_LIBCEPHFS OR WITH_KRBD)
    # keyutils is only used when talking to the Linux Kernel key store 
    find_package(keyutils REQUIRED)
    set(HAVE_KEYUTILS ${KEYUTILS_FOUND})
  endif()
endif()

find_package(snappy REQUIRED)

option(WITH_BROTLI "Brotli compression support" OFF)
if(WITH_BROTLI)
  set(HAVE_BROTLI TRUE)
endif()

option(WITH_LZ4 "LZ4 compression support" ON)
if(WITH_LZ4)
  find_package(LZ4 1.7 REQUIRED)
  set(HAVE_LZ4 ${LZ4_FOUND})
endif(WITH_LZ4)

CMAKE_DEPENDENT_OPTION(WITH_CEPH_DEBUG_MUTEX "Use debug ceph::mutex with lockdep" ON
  "CMAKE_BUILD_TYPE STREQUAL Debug" OFF)

#if allocator is set on command line make sure it matches below strings
set(ALLOCATOR "" CACHE STRING
  "specify memory allocator to use. currently tcmalloc, tcmalloc_minimal, \
jemalloc, and libc is supported. if not specified, will try to find tcmalloc, \
and then jemalloc. If neither of then is found. use the one in libc.")
if(ALLOCATOR)
  if(${ALLOCATOR} MATCHES "tcmalloc(_minimal)?")
    find_package(gperftools 2.6.2 REQUIRED)
    set(ALLOC_LIBS gperftools::${ALLOCATOR})
    set(HAVE_LIBTCMALLOC ON)
  elseif(${ALLOCATOR} STREQUAL "jemalloc")
    find_package(JeMalloc REQUIRED)
    set(ALLOC_LIBS JeMalloc::JeMalloc)
    set(HAVE_JEMALLOC 1)
  elseif(NOT ALLOCATOR STREQUAL "libc")
    message(FATAL_ERROR "Unsupported allocator selected: ${ALLOCATOR}")
  endif()
else(ALLOCATOR)
  find_package(gperftools 2.6.2)
  set(HAVE_LIBTCMALLOC ${gperftools_FOUND})
  if(NOT gperftools_FOUND)
    find_package(JeMalloc)
  endif()
  if(gperftools_FOUND)
    set(ALLOCATOR tcmalloc)
    set(ALLOC_LIBS gperftools::tcmalloc)
  elseif(JeMalloc_FOUND)
    set(ALLOCATOR jemalloc)
    set(ALLOC_LIBS JeMalloc::JeMalloc)
  else()
    if(NOT FREEBSD)
      # FreeBSD already has jemalloc as its default allocator
      message(WARNING "tcmalloc and jemalloc not found, falling back to libc")
    endif()
    set(ALLOCATOR "libc")
  endif(gperftools_FOUND)
endif(ALLOCATOR)
if(NOT ALLOCATOR STREQUAL "libc")
  add_compile_options(
    $<$<COMPILE_LANGUAGE:CXX>:-fno-builtin-malloc>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-builtin-calloc>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-builtin-realloc>
    $<$<COMPILE_LANGUAGE:CXX>:-fno-builtin-free>)
endif()
message(STATUS "allocator selected: ${ALLOCATOR}")

# Mingw generates incorrect entry points when using "-pie".
if(WIN32 OR (HAVE_LIBTCMALLOC AND WITH_STATIC_LIBSTDCXX))
  set(EXE_LINKER_USE_PIE FALSE)
else()
  set(EXE_LINKER_USE_PIE ${ENABLE_SHARED})
endif()

if(NOT WIN32)
  # require libcurl with good curl_multi_wait(), see https://tracker.ceph.com/issues/15915
  find_package(CURL 7.32 REQUIRED)
endif()

find_package(OpenSSL REQUIRED)
set(CRYPTO_LIBS OpenSSL::Crypto)

option(WITH_DPDK "Enable DPDK messaging" OFF)
if(WITH_DPDK)
  find_package(dpdk)
  if(NOT DPDK_FOUND)
    include(BuildDPDK)
    build_dpdk(${CMAKE_BINARY_DIR}/src/dpdk)
  endif()
  set(HAVE_DPDK TRUE)
endif()

option(WITH_BLKIN "Use blkin to emit LTTng tracepoints for Zipkin" OFF)
if(WITH_BLKIN)
  find_package(LTTngUST REQUIRED)
  set(BLKIN_LIBRARIES blkin ${LTTNGUST_LIBRARIES} lttng-ust-fork)
  include_directories(SYSTEM src/blkin/blkin-lib)
endif(WITH_BLKIN)

option(WITH_JAEGER "Enable jaegertracing and it's dependent libraries" ON)
if(WITH_JAEGER)
  set(HAVE_JAEGER TRUE)
endif()

#option for RGW
option(WITH_RADOSGW "RADOS Gateway is enabled" ON)
option(WITH_RADOSGW_BEAST_OPENSSL "RADOS Gateway's Beast frontend uses OpenSSL" ON)
option(WITH_RADOSGW_AMQP_ENDPOINT "RADOS Gateway's pubsub support for AMQP push endpoint" ON)
option(WITH_RADOSGW_KAFKA_ENDPOINT "RADOS Gateway's pubsub support for Kafka push endpoint" ON)
option(WITH_RADOSGW_LUA_PACKAGES "RADOS Gateway's support for dynamically adding lua packagess" ON)
option(WITH_RADOSGW_DBSTORE "DBStore backend for RADOS Gateway" ON)
option(WITH_RADOSGW_MOTR "CORTX-Motr backend for RADOS Gateway" OFF)
option(WITH_RADOSGW_DAOS "DAOS backend for RADOS Gateway" OFF)
option(WITH_RADOSGW_D4N "D4N wrapper for RADOS Gateway" ON)
option(WITH_RADOSGW_POSIX "POSIX backend for Rados Gateway" ON)
option(WITH_RADOSGW_SELECT_PARQUET "Support for s3 select on parquet objects" ON)
option(WITH_RADOSGW_ARROW_FLIGHT "Build arrow flight when not using system-provided arrow" OFF)
option(WITH_RADOSGW_BACKTRACE_LOGGING "Enable backtraces in rgw logs" OFF)

option(WITH_SYSTEM_ARROW "Use system-provided arrow" OFF)
option(WITH_SYSTEM_UTF8PROC "Use system-provided utf8proc" OFF)

if(WITH_RADOSGW)
  find_package(EXPAT REQUIRED)
  find_package(OATH REQUIRED)

# https://curl.haxx.se/docs/install.html mentions the
# configure flags for various ssl backends
  execute_process(
    COMMAND
  "sh" "-c"
  "curl-config --configure | grep with-ssl"
  RESULT_VARIABLE NO_CURL_SSL_LINK
  ERROR_VARIABLE CURL_CONFIG_ERRORS
  )
  if (CURL_CONFIG_ERRORS)
    message(WARNING "unable to run curl-config; rgw cannot make ssl requests to external systems reliably")
  endif()

  if (NOT NO_CURL_SSL_LINK)
    message(STATUS "libcurl is linked with openssl: explicitly setting locks")
    set(WITH_CURL_OPENSSL ON)
  endif() # CURL_SSL_LINK
  execute_process(
    COMMAND
      "sh" "-c"
      "objdump -p ${OPENSSL_SSL_LIBRARY} | sed -n 's/^  SONAME  *//p'"
    OUTPUT_VARIABLE LIBSSL_SONAME
    ERROR_VARIABLE OBJDUMP_ERRORS
    RESULT_VARIABLE OBJDUMP_RESULTS
    OUTPUT_STRIP_TRAILING_WHITESPACE)
  if (OBJDUMP_RESULTS)
    message(FATAL_ERROR "can't run objdump: ${OBJDUMP_RESULTS}")
  endif()
  if (NOT OBJDUMP_ERRORS STREQUAL "")
    message(WARNING "message from objdump: ${OBJDUMP_ERRORS}")
  endif()
  execute_process(
    COMMAND
      "sh" "-c"
      "objdump -p ${OPENSSL_CRYPTO_LIBRARY} | sed -n 's/^  SONAME  *//p'"
    OUTPUT_VARIABLE LIBCRYPTO_SONAME
    ERROR_VARIABLE OBJDUMP_ERRORS
    RESULT_VARIABLE OBJDUMP_RESULTS
    OUTPUT_STRIP_TRAILING_WHITESPACE)
  if (OBJDUMP_RESULTS)
    message(FATAL_ERROR "can't run objdump: ${OBJDUMP_RESULTS}")
  endif()
  if (NOT OBJDUMP_ERRORS STREQUAL "")
    message(WARNING "message from objdump: ${OBJDUMP_ERRORS}")
  endif()
  message(STATUS "ssl soname: ${LIBSSL_SONAME}")
  message(STATUS "crypto soname: ${LIBCRYPTO_SONAME}")
endif (WITH_RADOSGW)

#option for CephFS
option(WITH_CEPHFS "CephFS is enabled" ON)

if(NOT WIN32)
# Please specify 3.x if you want to build with a certain version of python3.
set(WITH_PYTHON3 "3" CACHE STRING "build with specified python3 version")
find_package(Python3 ${WITH_PYTHON3} EXACT REQUIRED
  COMPONENTS Interpreter Development)
if(Python3_VERSION VERSION_LESS 3.9)
  message(FATAL_ERROR "${Python3_VERSION} is not supported, please use Python 3.9 and up")
endif()

option(WITH_MGR "ceph-mgr is enabled" ON)
if(WITH_MGR)
  set(MGR_PYTHON_EXECUTABLE ${Python3_EXECUTABLE})
  set(MGR_PYTHON_LIBRARIES ${Python3_LIBRARIES})
  set(MGR_PYTHON_VERSION_MAJOR ${Python3_VERSION_MAJOR})
  set(MGR_PYTHON_VERSION_MINOR ${Python3_VERSION_MINOR})
  # Boost dependency check deferred to Boost section
endif(WITH_MGR)
endif(NOT WIN32)

option(WITH_THREAD_SAFE_RES_QUERY "res_query is thread safe" OFF)
if(WITH_THREAD_SAFE_RES_QUERY)
  set(HAVE_THREAD_SAFE_RES_QUERY 1 CACHE INTERNAL "Thread safe res_query supported.")
endif()

option(WITH_REENTRANT_STRSIGNAL "strsignal is reentrant" OFF)
if(WITH_REENTRANT_STRSIGNAL)
  set(HAVE_REENTRANT_STRSIGNAL 1 CACHE INTERNAL "Reentrant strsignal is supported.")
endif()

# -lz link into kv
find_package(ZLIB REQUIRED)

#option for EventTrace
CMAKE_DEPENDENT_OPTION(
  WITH_EVENTTRACE "Event tracing support, requires WITH_LTTNG"
  OFF "USE_LTTNG" OFF)

#option for LTTng
option(WITH_LTTNG "LTTng tracing is enabled" ON)
if(${WITH_LTTNG})
  find_package(LTTngUST REQUIRED)
  find_program(LTTNG_GEN_TP
    lttng-gen-tp)
  if(NOT LTTNG_GEN_TP)
    message(FATAL_ERROR "Can't find lttng-gen-tp.")
  endif()
endif(${WITH_LTTNG})

option(WITH_OSD_INSTRUMENT_FUNCTIONS OFF)

#option for Babeltrace
option(WITH_BABELTRACE "Babeltrace libraries are enabled" ON)
if(WITH_BABELTRACE)
  set(HAVE_BABELTRACE ON)
  find_package(babeltrace REQUIRED)
  set(HAVE_BABELTRACE_BABELTRACE_H ${BABELTRACE_FOUND})
  set(HAVE_BABELTRACE_CTF_EVENTS_H ${BABELTRACE_FOUND})
  set(HAVE_BABELTRACE_CTF_ITERATOR_H ${BABELTRACE_FOUND})
endif(WITH_BABELTRACE)

option(DEBUG_GATHER "C_Gather debugging is enabled" ON)
option(PG_DEBUG_REFS "PG Ref debugging is enabled" OFF)

option(WITH_TESTS "enable the build of ceph-test package scripts/binaries" ON)
set(UNIT_TESTS_BUILT ${WITH_TESTS})
set(CEPH_TEST_TIMEOUT 7200 CACHE STRING
  "Maximum time before a CTest gets killed" )

# fio
option(WITH_FIO "build with fio plugin enabled" OFF)
if(WITH_FIO)
  include(BuildFIO)
  build_fio()
endif()

if(LINUX)
  add_definitions(-D__linux__)
endif(LINUX)

# ASAN and friends
option(WITH_ASAN "build with ASAN" OFF)
if(WITH_ASAN)
  list(APPEND sanitizers "address")
endif()

option(WITH_ASAN_LEAK "explicitly enable ASAN leak detection" OFF)
if(WITH_ASAN_LEAK)
  list(APPEND sanitizers "leak")
endif()

option(WITH_TSAN "build with TSAN" OFF)
if(WITH_TSAN)
  list(APPEND sanitizers "thread")
endif()

option(WITH_UBSAN "build with UBSAN" OFF)
if(WITH_UBSAN)
  list(APPEND sanitizers "undefined_behavior")
endif()

if(sanitizers)
  find_package(Sanitizers REQUIRED ${sanitizers})
  add_compile_options(${Sanitizers_COMPILE_OPTIONS})
  string(REPLACE ";" " " sanitiers_compile_flags "${Sanitizers_COMPILE_OPTIONS}")
  string(APPEND CMAKE_EXE_LINKER_FLAGS " ${sanitiers_compile_flags}")
  string(APPEND CMAKE_SHARED_LINKER_FLAGS " ${sanitiers_compile_flags}")
endif()

# Rocksdb
option(WITH_SYSTEM_ROCKSDB "require and build with system rocksdb" OFF)
if (WITH_SYSTEM_ROCKSDB)
  find_package(RocksDB 5.14 REQUIRED)
endif()

option(WITH_SEASTAR "Build seastar components")
set(HAVE_SEASTAR ${WITH_SEASTAR})

# Boost
option(WITH_SYSTEM_BOOST "require and build with system Boost" OFF)

# Boost::thread depends on Boost::atomic, so list it explicitly.
set(BOOST_COMPONENTS
  atomic chrono thread system regex random program_options date_time
  iostreams context coroutine url)
set(BOOST_HEADER_COMPONENTS container)

if(WITH_MGR)
  list(APPEND BOOST_COMPONENTS
    python${MGR_PYTHON_VERSION_MAJOR}${MGR_PYTHON_VERSION_MINOR})
endif()
if(WITH_SEASTAR)
  list(APPEND BOOST_COMPONENTS timer)
endif()

if(WITH_RADOSGW AND WITH_RADOSGW_LUA_PACKAGES)
  list(APPEND BOOST_COMPONENTS filesystem)
endif()

set(Boost_USE_MULTITHREADED ON)

CMAKE_DEPENDENT_OPTION(WITH_BOOST_VALGRIND "Boost support for valgrind" OFF
  "NOT WITH_SYSTEM_BOOST" OFF)
# require minimally the bundled version
if(WITH_SYSTEM_BOOST)
  if(ENABLE_SHARED)
    set(Boost_USE_STATIC_LIBS OFF)
  else()
    set(Boost_USE_STATIC_LIBS ON)
  endif()
  if(BOOST_ROOT AND CMAKE_LIBRARY_ARCHITECTURE)
    set(BOOST_LIBRARYDIR "${BOOST_ROOT}/lib/${CMAKE_LIBRARY_ARCHITECTURE}")
  endif()
  find_package(Boost 1.85 COMPONENTS ${BOOST_COMPONENTS} REQUIRED)
  if(NOT ENABLE_SHARED)
    set_property(TARGET Boost::iostreams APPEND PROPERTY
      INTERFACE_LINK_LIBRARIES ZLIB::ZLIB)
  endif()
else()
  include(ProcessorCount)
  ProcessorCount(DEFAULT_BOOST_J)
  if(DEFAULT_BOOST_J EQUAL 0)
    set(DEFAULT_BOOST_J 1)
  endif()
  set(BOOST_J ${DEFAULT_BOOST_J} CACHE STRING "max jobs for Boost build") # override w/-DBOOST_J=<n>
  set(Boost_USE_STATIC_LIBS ON)
  include(BuildBoost)
  build_boost(1.85
    COMPONENTS ${BOOST_COMPONENTS} ${BOOST_HEADER_COMPONENTS})
endif()
include_directories(BEFORE SYSTEM ${Boost_INCLUDE_DIRS})

# dashboard angular2 frontend
option(WITH_MGR_DASHBOARD_FRONTEND "Build the mgr/dashboard frontend using `npm`" ON)
option(WITH_SYSTEM_NPM "Assume that dashboard build tools already installed through packages" OFF)
if(WITH_SYSTEM_NPM)
  find_program(NPM_EXECUTABLE npm)
  if(NOT NPM_EXECUTABLE)
    message(FATAL_ERROR "Can't find npm.")
  endif()
endif()
set(DASHBOARD_FRONTEND_LANGS "ALL" CACHE STRING
  "List of comma separated ceph-dashboard frontend languages to build. \
  Use value `ALL` to build all languages")
CMAKE_DEPENDENT_OPTION(WITH_MGR_ROOK_CLIENT "Enable the mgr's Rook support" ON
  "WITH_MGR" OFF)

include_directories(SYSTEM ${PROJECT_BINARY_DIR}/include)

find_package(Threads REQUIRED)
find_package(StdFilesystem REQUIRED)

option(WITH_SELINUX "build SELinux policy" OFF)
if(WITH_SELINUX)
  find_file(SELINUX_MAKEFILE selinux/devel/Makefile
    PATH /usr/share)
  if(NOT SELINUX_MAKEFILE)
    message(FATAL_ERROR "Can't find selinux's Makefile")
  endif()
  add_subdirectory(selinux)
endif(WITH_SELINUX)

# enables testing and creates Make check command
add_custom_target(tests
  COMMENT "Building tests")
enable_testing()
set(CMAKE_CTEST_COMMAND ctest)
add_custom_target(check
  COMMAND ${CMAKE_CTEST_COMMAND}
  DEPENDS tests)

option(WITH_SYSTEMD "build with systemd support" ON)

add_subdirectory(src)

add_subdirectory(qa)
add_subdirectory(doc)
if(WITH_MANPAGE)
  add_subdirectory(man)
endif(WITH_MANPAGE)

if(WITH_SYSTEMD)
  add_subdirectory(systemd)
endif()

if(LINUX)
  add_subdirectory(etc/sysctl)
endif()

option(WITH_GRAFANA "install grafana dashboards" OFF)
add_subdirectory(monitoring/ceph-mixin)

include(CTags)
option(CTAG_EXCLUDES "Exclude files/directories when running ctag.")
add_tags(ctags
  SRC_DIR src
  TAG_FILE tags
  EXCLUDE_OPTS ${CTAG_EXCLUDES}
  EXCLUDES "*.js" "*.css" ".tox" "python-common/build")
add_custom_target(tags DEPENDS ctags)