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# 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_STRING - The version of zlib found (x.y.z)
ZLIB_VERSION_MAJOR - The major version of zlib
ZLIB_VERSION_MINOR - The minor version of zlib
ZLIB_VERSION_PATCH - The patch version of zlib
ZLIB_VERSION_TWEAK - The tweak version of zlib
.. versionadded:: 3.4
Debug and Release variants are found separately.
Backward Compatibility
^^^^^^^^^^^^^^^^^^^^^^
The following variable are provided for backward compatibility
::
ZLIB_MAJOR_VERSION - The major version of zlib
ZLIB_MINOR_VERSION - The minor version of zlib
ZLIB_PATCH_VERSION - The patch version of zlib
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``.
#]=======================================================================]
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)
set(ZLIB_NAMES z zlib zdll zlib1 zlibstatic zlibstat zlibvc)
set(ZLIB_NAMES_DEBUG zd zlibd zdlld zlibd1 zlib1d zlibstaticd zlibstatd zlibvcd)
# 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)
# Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
if(ZLIB_USE_STATIC_LIBS)
set(_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
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(ZLIB_USE_STATIC_LIBS)
set(CMAKE_FIND_LIBRARY_SUFFIXES ${_zlib_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
endif()
include(${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}")
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_STRING)
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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