| # |
| # 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. |
| # |
| # Tries to find ZLIB headers and libraries. |
| # |
| # Usage of this module as follows: |
| # |
| # find_package(ZLIB) |
| # |
| # Variables used by this module, they can change the default behaviour and need |
| # to be set before calling find_package: |
| # |
| # ZLIB_HOME - When set, this path is inspected instead of standard library |
| # locations as the root of the ZLIB installation. |
| # The environment variable ZLIB_HOME overrides this variable. |
| # |
| # - Find ZLIB (zlib.h, libz.a, libz.so, and libz.so.1) |
| # This module defines |
| # ZLIB_INCLUDE_DIR, directory containing headers |
| # ZLIB_LIBS, directory containing zlib libraries |
| # ZLIB_STATIC_LIB, path to libz.a |
| # ZLIB_SHARED_LIB, path to libz's shared library |
| # ZLIB_FOUND, whether zlib has been found |
| |
| if( NOT "${ZLIB_HOME}" STREQUAL "") |
| file( TO_CMAKE_PATH "${ZLIB_HOME}" _native_path ) |
| list( APPEND _zlib_roots ${_native_path} ) |
| elseif ( ZLIB_HOME ) |
| list( APPEND _zlib_roots ${ZLIB_HOME} ) |
| endif() |
| |
| # Try the parameterized roots, if they exist |
| if ( _zlib_roots ) |
| find_path( ZLIB_INCLUDE_DIR NAMES zlib.h |
| PATHS ${_zlib_roots} NO_DEFAULT_PATH |
| PATH_SUFFIXES "include" ) |
| find_library( ZLIB_LIBRARIES NAMES libz.a zlib |
| PATHS ${_zlib_roots} NO_DEFAULT_PATH |
| PATH_SUFFIXES "lib" ) |
| else () |
| find_path( ZLIB_INCLUDE_DIR NAMES zlib.h ) |
| # Only look for the static library |
| find_library( ZLIB_LIBRARIES NAMES libz.a zlib ) |
| endif () |
| |
| |
| if (ZLIB_INCLUDE_DIR AND (PARQUET_MINIMAL_DEPENDENCY OR ZLIB_LIBRARIES)) |
| set(ZLIB_FOUND TRUE) |
| get_filename_component( ZLIB_LIBS ${ZLIB_LIBRARIES} PATH ) |
| set(ZLIB_HEADER_NAME zlib.h) |
| set(ZLIB_HEADER ${ZLIB_INCLUDE_DIR}/${ZLIB_HEADER_NAME}) |
| set(ZLIB_LIB_NAME z) |
| if (MSVC) |
| if (NOT ZLIB_MSVC_STATIC_LIB_SUFFIX) |
| set(ZLIB_MSVC_STATIC_LIB_SUFFIX libstatic) |
| endif() |
| set(ZLIB_MSVC_SHARED_LIB_SUFFIX lib) |
| endif() |
| set(ZLIB_STATIC_LIB ${ZLIB_LIBS}/${CMAKE_STATIC_LIBRARY_PREFIX}${ZLIB_LIB_NAME}${ZLIB_MSVC_STATIC_LIB_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}) |
| set(ZLIB_SHARED_LIB ${ZLIB_LIBS}/${CMAKE_SHARED_LIBRARY_PREFIX}${ZLIB_LIB_NAME}${ZLIB_MSVC_SHARED_LIB_SUFFIX}${CMAKE_SHARED_LIBRARY_SUFFIX}) |
| else () |
| set(ZLIB_FOUND FALSE) |
| endif () |
| |
| if (ZLIB_FOUND) |
| if (NOT ZLIB_FIND_QUIETLY) |
| if (PARQUET_MINIMAL_DEPENDENCY) |
| message(STATUS "Found the ZLIB header: ${ZLIB_HEADER}") |
| else() |
| message(STATUS "Found the ZLIB library: ${ZLIB_LIBRARIES}") |
| endif () |
| endif () |
| else () |
| if (NOT ZLIB_FIND_QUIETLY) |
| set(ZLIB_ERR_MSG "Could not find the ZLIB library. Looked in ") |
| if ( _zlib_roots ) |
| set(ZLIB_ERR_MSG "${ZLIB_ERR_MSG} in ${_zlib_roots}.") |
| else () |
| set(ZLIB_ERR_MSG "${ZLIB_ERR_MSG} system search paths.") |
| endif () |
| if (ZLIB_FIND_REQUIRED) |
| message(FATAL_ERROR "${ZLIB_ERR_MSG}") |
| else (ZLIB_FIND_REQUIRED) |
| message(STATUS "${ZLIB_ERR_MSG}") |
| endif (ZLIB_FIND_REQUIRED) |
| endif () |
| endif () |
| |
| mark_as_advanced( |
| ZLIB_INCLUDE_DIR |
| ZLIB_LIBS |
| ZLIB_LIBRARIES |
| ZLIB_STATIC_LIB |
| ZLIB_SHARED_LIB |
| ) |