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FindZLIB.cmake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. #[=======================================================================[.rst: FindZLIB -------- Find the native ZLIB includes and library. IMPORTED Targets ^^^^^^^^^^^^^^^^ .. versionadded:: 3.1 This module defines :prop_tgt:`IMPORTED` target ``ZLIB::ZLIB``, if ZLIB has been found. Result Variables ^^^^^^^^^^^^^^^^ This module defines the following variables: ``ZLIB_INCLUDE_DIRS`` where to find zlib.h, etc. ``ZLIB_LIBRARIES`` List of libraries when using zlib. ``ZLIB_FOUND`` True if zlib found. ``ZLIB_VERSION`` .. versionadded:: 3.26 the version of Zlib found. See also legacy variable ``ZLIB_VERSION_STRING``. .. versionadded:: 3.4 Debug and Release variants are found separately. Legacy Variables ^^^^^^^^^^^^^^^^ The following variables are provided for backward compatibility: ``ZLIB_VERSION_MAJOR`` The major version of zlib. .. versionchanged:: 3.26 Superseded by ``ZLIB_VERSION``. ``ZLIB_VERSION_MINOR`` The minor version of zlib. .. versionchanged:: 3.26 Superseded by ``ZLIB_VERSION``. ``ZLIB_VERSION_PATCH`` The patch version of zlib. .. versionchanged:: 3.26 Superseded by ``ZLIB_VERSION``. ``ZLIB_VERSION_TWEAK`` The tweak version of zlib. .. versionchanged:: 3.26 Superseded by ``ZLIB_VERSION``. ``ZLIB_VERSION_STRING`` The version of zlib found (x.y.z) .. versionchanged:: 3.26 Superseded by ``ZLIB_VERSION``. ``ZLIB_MAJOR_VERSION`` The major version of zlib. Superseded by ``ZLIB_VERSION_MAJOR``. ``ZLIB_MINOR_VERSION`` The minor version of zlib. Superseded by ``ZLIB_VERSION_MINOR``. ``ZLIB_PATCH_VERSION`` The patch version of zlib. Superseded by ``ZLIB_VERSION_PATCH``. Hints ^^^^^ A user may set ``ZLIB_ROOT`` to a zlib installation root to tell this module where to look. .. versionadded:: 3.24 Set ``ZLIB_USE_STATIC_LIBS`` to ``ON`` to look for static libraries. Default is ``OFF``. #]=======================================================================] if(ZLIB_FIND_COMPONENTS AND NOT ZLIB_FIND_QUIETLY) message(AUTHOR_WARNING "ZLIB does not provide any COMPONENTS. Calling\n" " find_package(ZLIB COMPONENTS ...)\n" "will always fail." ) endif() set(_ZLIB_SEARCHES) # Search ZLIB_ROOT first if it is set. if(ZLIB_ROOT) set(_ZLIB_SEARCH_ROOT PATHS ${ZLIB_ROOT} NO_DEFAULT_PATH) list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_ROOT) endif() # Normal search. set(_ZLIB_x86 "(x86)") set(_ZLIB_SEARCH_NORMAL PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]" "$ENV{ProgramFiles}/zlib" "$ENV{ProgramFiles${_ZLIB_x86}}/zlib") unset(_ZLIB_x86) list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_NORMAL) if(ZLIB_USE_STATIC_LIBS) set(ZLIB_NAMES zlibstatic zlibstat zlib z) set(ZLIB_NAMES_DEBUG zlibstaticd zlibstatd zlibd zd) else() set(ZLIB_NAMES z zlib zdll zlib1 zlibstatic zlibwapi zlibvc zlibstat) set(ZLIB_NAMES_DEBUG zd zlibd zdlld zlibd1 zlib1d zlibstaticd zlibwapid zlibvcd zlibstatd) endif() # Try each search configuration. foreach(search ${_ZLIB_SEARCHES}) find_path(ZLIB_INCLUDE_DIR NAMES zlib.h ${${search}} PATH_SUFFIXES include) endforeach() # Allow ZLIB_LIBRARY to be set manually, as the location of the zlib library if(NOT ZLIB_LIBRARY) if(DEFINED CMAKE_FIND_LIBRARY_PREFIXES) set(_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}") else() set(_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES) endif() if(DEFINED CMAKE_FIND_LIBRARY_SUFFIXES) set(_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES "${CMAKE_FIND_LIBRARY_SUFFIXES}") else() set(_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES) endif() # Prefix/suffix of the win32/Makefile.gcc build if(WIN32) list(APPEND CMAKE_FIND_LIBRARY_PREFIXES "" "lib") list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".dll.a") endif() # Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES if(ZLIB_USE_STATIC_LIBS) if(WIN32) set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES}) else() set(CMAKE_FIND_LIBRARY_SUFFIXES .a) endif() endif() foreach(search ${_ZLIB_SEARCHES}) find_library(ZLIB_LIBRARY_RELEASE NAMES ${ZLIB_NAMES} NAMES_PER_DIR ${${search}} PATH_SUFFIXES lib) find_library(ZLIB_LIBRARY_DEBUG NAMES ${ZLIB_NAMES_DEBUG} NAMES_PER_DIR ${${search}} PATH_SUFFIXES lib) endforeach() # Restore the original find library ordering if(DEFINED _zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES) set(CMAKE_FIND_LIBRARY_SUFFIXES "${_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES}") else() set(CMAKE_FIND_LIBRARY_SUFFIXES) endif() if(DEFINED _zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES) set(CMAKE_FIND_LIBRARY_PREFIXES "${_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES}") else() set(CMAKE_FIND_LIBRARY_PREFIXES) endif() include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake) select_library_configurations(ZLIB) endif() unset(ZLIB_NAMES) unset(ZLIB_NAMES_DEBUG) mark_as_advanced(ZLIB_INCLUDE_DIR) if(ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h") file(STRINGS "${ZLIB_INCLUDE_DIR}/zlib.h" ZLIB_H REGEX "^#define ZLIB_VERSION \"[^\"]*\"$") string(REGEX REPLACE "^.*ZLIB_VERSION \"([0-9]+).*$" "\\1" ZLIB_VERSION_MAJOR "${ZLIB_H}") string(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_MINOR "${ZLIB_H}") string(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_PATCH "${ZLIB_H}") set(ZLIB_VERSION_STRING "${ZLIB_VERSION_MAJOR}.${ZLIB_VERSION_MINOR}.${ZLIB_VERSION_PATCH}") # only append a TWEAK version if it exists: set(ZLIB_VERSION_TWEAK "") if( "${ZLIB_H}" MATCHES "ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]+\\.([0-9]+)") set(ZLIB_VERSION_TWEAK "${CMAKE_MATCH_1}") string(APPEND ZLIB_VERSION_STRING ".${ZLIB_VERSION_TWEAK}") endif() set(ZLIB_MAJOR_VERSION "${ZLIB_VERSION_MAJOR}") set(ZLIB_MINOR_VERSION "${ZLIB_VERSION_MINOR}") set(ZLIB_PATCH_VERSION "${ZLIB_VERSION_PATCH}") set(ZLIB_VERSION ${ZLIB_VERSION_STRING}) endif() include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR VERSION_VAR ZLIB_VERSION HANDLE_COMPONENTS) if(ZLIB_FOUND) set(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR}) if(NOT ZLIB_LIBRARIES) set(ZLIB_LIBRARIES ${ZLIB_LIBRARY}) endif() if(NOT TARGET ZLIB::ZLIB) add_library(ZLIB::ZLIB UNKNOWN IMPORTED) set_target_properties(ZLIB::ZLIB PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_INCLUDE_DIRS}") if(ZLIB_LIBRARY_RELEASE) set_property(TARGET ZLIB::ZLIB APPEND PROPERTY IMPORTED_CONFIGURATIONS RELEASE) set_target_properties(ZLIB::ZLIB PROPERTIES IMPORTED_LOCATION_RELEASE "${ZLIB_LIBRARY_RELEASE}") endif() if(ZLIB_LIBRARY_DEBUG) set_property(TARGET ZLIB::ZLIB APPEND PROPERTY IMPORTED_CONFIGURATIONS DEBUG) set_target_properties(ZLIB::ZLIB PROPERTIES IMPORTED_LOCATION_DEBUG "${ZLIB_LIBRARY_DEBUG}") endif() if(NOT ZLIB_LIBRARY_RELEASE AND NOT ZLIB_LIBRARY_DEBUG) set_property(TARGET ZLIB::ZLIB APPEND PROPERTY IMPORTED_LOCATION "${ZLIB_LIBRARY}") endif() endif() endif()
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