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235 lines
7.3 KiB
CMake
235 lines
7.3 KiB
CMake
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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FindZLIB
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--------
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Find the native ZLIB includes and library.
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IMPORTED Targets
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^^^^^^^^^^^^^^^^
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.. versionadded:: 3.1
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This module defines :prop_tgt:`IMPORTED` target ``ZLIB::ZLIB``, if
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ZLIB has been found.
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Result Variables
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^^^^^^^^^^^^^^^^
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This module defines the following variables:
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``ZLIB_INCLUDE_DIRS``
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where to find zlib.h, etc.
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``ZLIB_LIBRARIES``
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List of libraries when using zlib.
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``ZLIB_FOUND``
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True if zlib found.
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``ZLIB_VERSION``
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.. versionadded:: 3.26
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the version of Zlib found.
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See also legacy variable ``ZLIB_VERSION_STRING``.
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.. versionadded:: 3.4
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Debug and Release variants are found separately.
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Legacy Variables
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^^^^^^^^^^^^^^^^
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The following variables are provided for backward compatibility:
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``ZLIB_VERSION_MAJOR``
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The major version of zlib.
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.. versionchanged:: 3.26
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Superseded by ``ZLIB_VERSION``.
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``ZLIB_VERSION_MINOR``
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The minor version of zlib.
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.. versionchanged:: 3.26
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Superseded by ``ZLIB_VERSION``.
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``ZLIB_VERSION_PATCH``
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The patch version of zlib.
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.. versionchanged:: 3.26
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Superseded by ``ZLIB_VERSION``.
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``ZLIB_VERSION_TWEAK``
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The tweak version of zlib.
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.. versionchanged:: 3.26
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Superseded by ``ZLIB_VERSION``.
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``ZLIB_VERSION_STRING``
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The version of zlib found (x.y.z)
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.. versionchanged:: 3.26
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Superseded by ``ZLIB_VERSION``.
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``ZLIB_MAJOR_VERSION``
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The major version of zlib. Superseded by ``ZLIB_VERSION_MAJOR``.
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``ZLIB_MINOR_VERSION``
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The minor version of zlib. Superseded by ``ZLIB_VERSION_MINOR``.
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``ZLIB_PATCH_VERSION``
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The patch version of zlib. Superseded by ``ZLIB_VERSION_PATCH``.
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Hints
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^^^^^
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A user may set ``ZLIB_ROOT`` to a zlib installation root to tell this
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module where to look.
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.. versionadded:: 3.24
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Set ``ZLIB_USE_STATIC_LIBS`` to ``ON`` to look for static libraries.
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Default is ``OFF``.
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#]=======================================================================]
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if(ZLIB_FIND_COMPONENTS AND NOT ZLIB_FIND_QUIETLY)
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message(AUTHOR_WARNING
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"ZLIB does not provide any COMPONENTS. Calling\n"
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" find_package(ZLIB COMPONENTS ...)\n"
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"will always fail."
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)
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endif()
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set(_ZLIB_SEARCHES)
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# Search ZLIB_ROOT first if it is set.
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if(ZLIB_ROOT)
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set(_ZLIB_SEARCH_ROOT PATHS ${ZLIB_ROOT} NO_DEFAULT_PATH)
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list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_ROOT)
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endif()
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# Normal search.
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set(_ZLIB_x86 "(x86)")
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set(_ZLIB_SEARCH_NORMAL
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PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]"
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"$ENV{ProgramFiles}/zlib"
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"$ENV{ProgramFiles${_ZLIB_x86}}/zlib")
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unset(_ZLIB_x86)
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list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_NORMAL)
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if(ZLIB_USE_STATIC_LIBS)
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set(ZLIB_NAMES zlibstatic zlibstat zlib z)
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set(ZLIB_NAMES_DEBUG zlibstaticd zlibstatd zlibd zd)
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else()
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set(ZLIB_NAMES z zlib zdll zlib1 zlibstatic zlibwapi zlibvc zlibstat)
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set(ZLIB_NAMES_DEBUG zd zlibd zdlld zlibd1 zlib1d zlibstaticd zlibwapid zlibvcd zlibstatd)
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endif()
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# Try each search configuration.
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foreach(search ${_ZLIB_SEARCHES})
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find_path(ZLIB_INCLUDE_DIR NAMES zlib.h ${${search}} PATH_SUFFIXES include)
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endforeach()
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# Allow ZLIB_LIBRARY to be set manually, as the location of the zlib library
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if(NOT ZLIB_LIBRARY)
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if(DEFINED CMAKE_FIND_LIBRARY_PREFIXES)
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set(_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES "${CMAKE_FIND_LIBRARY_PREFIXES}")
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else()
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set(_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES)
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endif()
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if(DEFINED CMAKE_FIND_LIBRARY_SUFFIXES)
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set(_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES "${CMAKE_FIND_LIBRARY_SUFFIXES}")
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else()
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set(_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES)
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endif()
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# Prefix/suffix of the win32/Makefile.gcc build
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if(WIN32)
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list(APPEND CMAKE_FIND_LIBRARY_PREFIXES "" "lib")
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list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES ".dll.a")
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endif()
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# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
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if(ZLIB_USE_STATIC_LIBS)
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if(WIN32)
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set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
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else()
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set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
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endif()
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endif()
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foreach(search ${_ZLIB_SEARCHES})
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find_library(ZLIB_LIBRARY_RELEASE NAMES ${ZLIB_NAMES} NAMES_PER_DIR ${${search}} PATH_SUFFIXES lib)
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find_library(ZLIB_LIBRARY_DEBUG NAMES ${ZLIB_NAMES_DEBUG} NAMES_PER_DIR ${${search}} PATH_SUFFIXES lib)
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endforeach()
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# Restore the original find library ordering
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if(DEFINED _zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES)
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set(CMAKE_FIND_LIBRARY_SUFFIXES "${_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES}")
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else()
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set(CMAKE_FIND_LIBRARY_SUFFIXES)
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endif()
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if(DEFINED _zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES)
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set(CMAKE_FIND_LIBRARY_PREFIXES "${_zlib_ORIG_CMAKE_FIND_LIBRARY_PREFIXES}")
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else()
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set(CMAKE_FIND_LIBRARY_PREFIXES)
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/SelectLibraryConfigurations.cmake)
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select_library_configurations(ZLIB)
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endif()
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unset(ZLIB_NAMES)
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unset(ZLIB_NAMES_DEBUG)
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mark_as_advanced(ZLIB_INCLUDE_DIR)
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if(ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h")
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file(STRINGS "${ZLIB_INCLUDE_DIR}/zlib.h" ZLIB_H REGEX "^#define ZLIB_VERSION \"[^\"]*\"$")
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if(ZLIB_H MATCHES "ZLIB_VERSION \"(([0-9]+)\\.([0-9]+)(\\.([0-9]+)(\\.([0-9]+))?)?)")
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set(ZLIB_VERSION_STRING "${CMAKE_MATCH_1}")
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set(ZLIB_VERSION_MAJOR "${CMAKE_MATCH_2}")
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set(ZLIB_VERSION_MINOR "${CMAKE_MATCH_3}")
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set(ZLIB_VERSION_PATCH "${CMAKE_MATCH_5}")
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set(ZLIB_VERSION_TWEAK "${CMAKE_MATCH_7}")
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else()
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set(ZLIB_VERSION_STRING "")
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set(ZLIB_VERSION_MAJOR "")
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set(ZLIB_VERSION_MINOR "")
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set(ZLIB_VERSION_PATCH "")
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set(ZLIB_VERSION_TWEAK "")
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endif()
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set(ZLIB_MAJOR_VERSION "${ZLIB_VERSION_MAJOR}")
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set(ZLIB_MINOR_VERSION "${ZLIB_VERSION_MINOR}")
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set(ZLIB_PATCH_VERSION "${ZLIB_VERSION_PATCH}")
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set(ZLIB_VERSION "${ZLIB_VERSION_STRING}")
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endif()
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include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR
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VERSION_VAR ZLIB_VERSION
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HANDLE_COMPONENTS)
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if(ZLIB_FOUND)
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set(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR})
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if(NOT ZLIB_LIBRARIES)
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set(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
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endif()
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if(NOT TARGET ZLIB::ZLIB)
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add_library(ZLIB::ZLIB UNKNOWN IMPORTED)
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set_target_properties(ZLIB::ZLIB PROPERTIES
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INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_INCLUDE_DIRS}")
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if(ZLIB_LIBRARY_RELEASE)
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set_property(TARGET ZLIB::ZLIB APPEND PROPERTY
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IMPORTED_CONFIGURATIONS RELEASE)
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set_target_properties(ZLIB::ZLIB PROPERTIES
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IMPORTED_LOCATION_RELEASE "${ZLIB_LIBRARY_RELEASE}")
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endif()
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if(ZLIB_LIBRARY_DEBUG)
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set_property(TARGET ZLIB::ZLIB APPEND PROPERTY
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IMPORTED_CONFIGURATIONS DEBUG)
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set_target_properties(ZLIB::ZLIB PROPERTIES
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IMPORTED_LOCATION_DEBUG "${ZLIB_LIBRARY_DEBUG}")
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endif()
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if(NOT ZLIB_LIBRARY_RELEASE AND NOT ZLIB_LIBRARY_DEBUG)
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set_property(TARGET ZLIB::ZLIB APPEND PROPERTY
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IMPORTED_LOCATION "${ZLIB_LIBRARY}")
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endif()
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endif()
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endif()
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