update ceph source to reef 18.1.2

[ceph.git] / ceph / src / seastar / cmake / Findlz4.cmake

#
# This file is open source software, licensed to you under the terms
# of the Apache License, Version 2.0 (the "License").  See the NOTICE file
# distributed with this work for additional information regarding copyright
# ownership.  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.
#

#
# Copyright (C) 2018 Scylladb, Ltd.
#

find_package (PkgConfig REQUIRED)

pkg_search_module (PC_lz4 QUIET liblz4)

find_library (lz4_LIBRARY
  NAMES lz4
  HINTS
    ${PC_lz4_LIBDIR}
    ${PC_lz4_LIBRARY_DIRS})

find_path (lz4_INCLUDE_DIR
  NAMES lz4.h
  HINTS
    ${PC_lz4_INCLUDEDIR}
    ${PC_lz4_INCLUDE_DIRS})

mark_as_advanced (
  lz4_LIBRARY
  lz4_INCLUDE_DIR)

include (FindPackageHandleStandardArgs)

find_package_handle_standard_args (lz4
  REQUIRED_VARS
    lz4_LIBRARY
    lz4_INCLUDE_DIR
  VERSION_VAR lz4_VERSION)

if (lz4_FOUND)
  set (CMAKE_REQUIRED_LIBRARIES ${lz4_LIBRARY})
  include (CheckSymbolExists)

  check_symbol_exists (LZ4_compress_default
    ${lz4_INCLUDE_DIR}/lz4.h
    lz4_HAVE_COMPRESS_DEFAULT)

  set (lz4_LIBRARIES ${lz4_LIBRARY})
  set (lz4_INCLUDE_DIRS ${lz4_INCLUDE_DIR})

  if (NOT (TARGET lz4::lz4))
    add_library (lz4::lz4 UNKNOWN IMPORTED)

    set_target_properties (lz4::lz4
      PROPERTIES
        IMPORTED_LOCATION ${lz4_LIBRARY}
        INTERFACE_INCLUDE_DIRECTORIES ${lz4_INCLUDE_DIRS})
  endif ()
endif ()