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# - Find zlib
#
# Find the native ZLIB includes and library.
# Once done this will define
#
# ZLIB_INCLUDE_DIRS - where to find zlib.h, etc.
# ZLIB_LIBRARIES - List of libraries when using zlib.
# ZLIB_FOUND - True if zlib found.
# ZLIB_DLL_DIR - (Windows) Path to the zlib DLL.
# ZLIB_DLL - (Windows) Name of the zlib DLL.
# ZLIB_PDB - (Windows) Name of the zlib PDB.
#
# 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
#
# 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
#=============================================================================
# Copyright 2001-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
# License text for the above reference.)
include( FindWSWinLibs )
# Zlib is included with GLib2
FindWSWinLibs( "vcpkg-export-*" "ZLIB_HINTS" )
if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY)
find_package(PkgConfig)
pkg_search_module(ZLIB zlib)
FIND_PATH(ZLIB_INCLUDE_DIR
NAMES
zlib.h
HINTS
"${ZLIB_INCLUDEDIR}"
${ZLIB_HINTS}/include
${ZLIB_HINTS}
PATHS
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/include"
)
SET(ZLIB_NAMES z zlib zdll zlib1 zlibd zlibd1)
FIND_LIBRARY(ZLIB_LIBRARY
NAMES
${ZLIB_NAMES}
HINTS
"${ZLIB_LIBDIR}"
${ZLIB_HINTS}/lib
${ZLIB_HINTS}
PATHS
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/lib"
)
endif()
MARK_AS_ADVANCED(ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
# handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if
# all listed variables are TRUE
INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR
VERSION_VAR ZLIB_VERSION_STRING)
if(ZLIB_FOUND)
IF(ZLIB_INCLUDE_DIR AND EXISTS "${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}")
SET(ZLIB_VERSION_STRING "${ZLIB_VERSION_STRING}.${ZLIB_VERSION_TWEAK}")
ENDIF( "${ZLIB_H}" MATCHES "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]+\\.([0-9]+).*$")
SET(ZLIB_MAJOR_VERSION "${ZLIB_VERSION_MAJOR}")
SET(ZLIB_MINOR_VERSION "${ZLIB_VERSION_MINOR}")
SET(ZLIB_PATCH_VERSION "${ZLIB_VERSION_PATCH}")
ENDIF()
#
# inflatePrime was added in zlib 1.2.2.4 in 2005. We're guaranteed
# to have it on Windows.
#
IF(WIN32)
SET(HAVE_INFLATEPRIME ON)
ELSE()
INCLUDE(CMakePushCheckState)
INCLUDE(CheckFunctionExists)
CMAKE_PUSH_CHECK_STATE()
set(CMAKE_REQUIRED_INCLUDES ${ZLIB_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${ZLIB_LIBRARY})
#
# Check for inflate() in zlib, to make sure the zlib library is
# usable.
#
# For example, on at least some versions of Fedora, if you have a
# 64-bit machine, have both the 32-bit and 64-bit versions of the
# run-time zlib package installed, and have only the *32-bit*
# version of the zlib development package installed, it'll find the
# header, and think it can use zlib, and will use it in subsequent
# tests, but it'll try and link 64-bit test programs with the 32-bit
# library, causing those tests to falsely fail. Hilarity ensues.
#
CHECK_FUNCTION_EXISTS("inflate" HAVE_INFLATE)
IF(NOT HAVE_INFLATE)
MESSAGE(FATAL_ERROR "zlib.h found but linking with -lz failed to find inflate(); do you have the right developer package installed (32-bit vs. 64-bit)?")
ENDIF()
CHECK_FUNCTION_EXISTS("inflatePrime" HAVE_INFLATEPRIME)
# reset
CMAKE_POP_CHECK_STATE()
ENDIF()
AddWSWinDLL(ZLIB ZLIB_HINTS "zlib*")
SET(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR})
SET(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
ELSE()
SET(ZLIB_INCLUDE_DIRS )
SET(ZLIB_LIBRARIES )
SET(ZLIB_DLL_DIR )
SET(ZLIB_DLL )
SET(ZLIB_PDB )
ENDIF()
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