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# - Try to find ZLIB
# Once done this will define
#
# ZLIB_ROOT_DIR - Set this variable to the root installation of ZLIB
#
# Read-Only variables:
# ZLIB_FOUND - system has ZLIB
# ZLIB_INCLUDE_DIRS - the ZLIB include directory
# ZLIB_LIBRARIES - Link these to use ZLIB
#
# 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 (c) 2001-2009 Kitware, Inc.
# Copyright (c) 2011 Andreas Schneider <asn@cryptomilk.org>
#
# 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.
#=============================================================================
#
if (ZLIB_LIBRARIES AND ZLIB_INCLUDE_DIRS)
# in cache already
set(ZLIB_FOUND TRUE)
else (ZLIB_LIBRARIES AND ZLIB_INCLUDE_DIRS)
set(_ZLIB_ROOT_HINTS
"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/include"
)
set(_ZLIB_ROOT_PATHS
"$ENV{PROGRAMFILES}/zlib"
)
find_path(ZLIB_ROOT_DIR
NAMES
include/zlib.h
HINTS
${_ZLIB_ROOT_HINTS}
PATHS
${_ZLIB_ROOT_PATHS}
)
mark_as_advanced(ZLIB_ROOT_DIR)
# check for header file
find_path(ZLIB_INCLUDE_DIR
NAMES
zlib.h
PATHS
/usr/local/include
/opt/local/include
/sw/include
/usr/lib/sfw/include
${ZLIB_ROOT_DIR}/include
)
mark_as_advanced(ZLIB_INCLUDE_DIR)
# check version number
if (ZLIB_INCLUDE_DIR AND EXISTS "${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 "${ZLIB_VERSION_PATCH}")
endif (ZLIB_INCLUDE_DIR AND EXISTS "${ZLIB_INCLUDE_DIR}/zlib.h")
find_library(ZLIB_LIBRARY
NAMES
z
zdll
zlib
zlib1
zlibd
PATHS
/usr/local/lib
/opt/local/lib
/sw/lib
/usr/sfw/lib/64
/usr/sfw/lib
${ZLIB_ROOT_DIR}/lib
)
mark_as_advanced(ZLIB_LIBRARY)
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(ZLIB DEFAULT_MSG ZLIB_INCLUDE_DIR ZLIB_LIBRARY)
#find_package_handle_standard_args(ZLIB REQUIRED_VARS ZLIB_INCLUDE_DIR ZLIB_LIBRARY
# VERSION_VAR ZLIB_VERSION_STRING)
if (ZLIB_FOUND)
set(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR})
set(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
endif (ZLIB_FOUND)
endif (ZLIB_LIBRARIES AND ZLIB_INCLUDE_DIRS)
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