cmake_modules/FindLz4.cmake

# Copyright 2012 Cloudera Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# - Find LZ4 (lz4.h, liblz4.a, liblz4.so, and liblz4.so.1)
# This module defines
#  LZ4_INCLUDE_DIR, directory containing headers
#  LZ4_LIBS, directory containing lz4 libraries
#  LZ4_STATIC_LIB, path to liblz4.a
#  LZ4_FOUND, whether lz4 has been found

set(LZ4_SEARCH_HEADER_PATHS
  ${THIRDPARTY_PREFIX}/include
)

set(LZ4_SEARCH_LIB_PATH
  ${THIRDPARTY_PREFIX}/lib
)

find_path(LZ4_INCLUDE_DIR lz4.h PATHS
  ${LZ4_SEARCH_HEADER_PATHS}
  # make sure we don't accidentally pick up a different version
  NO_DEFAULT_PATH
)

find_library(LZ4_LIB_PATH NAMES liblz4.a PATHS ${LZ4_SEARCH_LIB_PATH} NO_DEFAULT_PATH)

if (LZ4_INCLUDE_DIR AND LZ4_LIB_PATH)
  set(LZ4_FOUND TRUE)
  set(LZ4_LIBS ${LZ4_SEARCH_LIB_PATH})
  set(LZ4_STATIC_LIB ${LZ4_SEARCH_LIB_PATH}/liblz4.a)
else ()
  set(LZ4_FOUND FALSE)
endif ()

if (LZ4_FOUND)
  if (NOT Lz4_FIND_QUIETLY)
    message(STATUS "Found the Lz4 library: ${LZ4_LIB_PATH}")
  endif ()
else ()
  if (NOT Lz4_FIND_QUIETLY)
    set(LZ4_ERR_MSG "Could not find the Lz4 library. Looked for headers")
    set(LZ4_ERR_MSG "${LZ4_ERR_MSG} in ${LZ4_SEARCH_HEADER_PATHS}, and for libs")
    set(LZ4_ERR_MSG "${LZ4_ERR_MSG} in ${LZ4_SEARCH_LIB_PATH}")
    if (Lz4_FIND_REQUIRED)
      message(FATAL_ERROR "${LZ4_ERR_MSG}")
    else (Lz4_FIND_REQUIRED)
      message(STATUS "${LZ4_ERR_MSG}")
    endif (Lz4_FIND_REQUIRED)
  endif ()
endif ()

mark_as_advanced(
  LZ4_INCLUDE_DIR
  LZ4_LIBS
  LZ4_STATIC_LIB
)