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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
# ^^^^^^^^^^^^^^^^
#
# 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
#
# 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.
set(_ZLIB_SEARCHES)
# Search ZLIB_ROOT first if it is set.
if(ZLIB_ROOT)
set(_ZLIB_SEARCH_ROOT PATHS ${ZLIB_ROOT} NO_DEFAULT_PATH)
list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_ROOT)
endif()
# Normal search.
set(_ZLIB_SEARCH_NORMAL
PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]"
"$ENV{PROGRAMFILES}/zlib"
)
list(APPEND _ZLIB_SEARCHES _ZLIB_SEARCH_NORMAL)
set(ZLIB_NAMES z zlib zdll zlib1)
set(ZLIB_NAMES_DEBUG zlibd zlibd1)
# 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)
foreach(search ${_ZLIB_SEARCHES})
find_library(ZLIB_LIBRARY_RELEASE NAMES ${ZLIB_NAMES} ${${search}} PATH_SUFFIXES lib)
find_library(ZLIB_LIBRARY_DEBUG NAMES ${ZLIB_NAMES_DEBUG} ${${search}} PATH_SUFFIXES lib)
endforeach()
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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