143 lines
5.5 KiB
CMake
143 lines
5.5 KiB
CMake
# - Find zlib
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#
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# Find the native ZLIB includes and library.
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# Once done this will define
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#
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# ZLIB_INCLUDE_DIRS - where to find zlib.h, etc.
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# ZLIB_LIBRARIES - List of libraries when using zlib.
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# ZLIB_FOUND - True if zlib found.
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# ZLIB_DLL_DIR - (Windows) Path to the zlib DLL.
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# ZLIB_DLL - (Windows) Name of the zlib DLL.
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# ZLIB_PDB - (Windows) Name of the zlib PDB.
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#
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# ZLIB_VERSION_STRING - The version of zlib found (x.y.z)
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# ZLIB_VERSION_MAJOR - The major version of zlib
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# ZLIB_VERSION_MINOR - The minor version of zlib
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# ZLIB_VERSION_PATCH - The patch version of zlib
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# ZLIB_VERSION_TWEAK - The tweak version of zlib
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#
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# The following variable are provided for backward compatibility
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#
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# ZLIB_MAJOR_VERSION - The major version of zlib
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# ZLIB_MINOR_VERSION - The minor version of zlib
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# ZLIB_PATCH_VERSION - The patch version of zlib
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#=============================================================================
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# Copyright 2001-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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include( FindWSWinLibs )
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# Zlib is included with GLib2
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FindWSWinLibs( "vcpkg-export-*" "ZLIB_HINTS" )
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if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY)
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if (NOT WIN32) # else we'll find Strawberry Perl's pkgconfig
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find_package(PkgConfig)
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pkg_search_module(ZLIB zlib)
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endif()
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FIND_PATH(ZLIB_INCLUDE_DIR
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NAMES
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zlib.h
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HINTS
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"${ZLIB_INCLUDEDIR}"
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${ZLIB_HINTS}/include
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${ZLIB_HINTS}
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PATHS
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/include"
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)
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SET(ZLIB_NAMES z zlib zdll zlib1 zlibd zlibd1)
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FIND_LIBRARY(ZLIB_LIBRARY
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NAMES
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${ZLIB_NAMES}
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HINTS
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"${ZLIB_LIBDIR}"
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${ZLIB_HINTS}/lib
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${ZLIB_HINTS}
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PATHS
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"[HKEY_LOCAL_MACHINE\\SOFTWARE\\GnuWin32\\Zlib;InstallPath]/lib"
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)
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endif()
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MARK_AS_ADVANCED(ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
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# handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if
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# all listed variables are TRUE
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INCLUDE(FindPackageHandleStandardArgs)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR
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VERSION_VAR ZLIB_VERSION_STRING)
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if(ZLIB_FOUND)
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IF(ZLIB_INCLUDE_DIR AND EXISTS "${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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STRING(REGEX REPLACE "^.*ZLIB_VERSION \"([0-9]+).*$" "\\1" ZLIB_VERSION_MAJOR "${ZLIB_H}")
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STRING(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_MINOR "${ZLIB_H}")
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STRING(REGEX REPLACE "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.([0-9]+).*$" "\\1" ZLIB_VERSION_PATCH "${ZLIB_H}")
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SET(ZLIB_VERSION_STRING "${ZLIB_VERSION_MAJOR}.${ZLIB_VERSION_MINOR}.${ZLIB_VERSION_PATCH}")
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# only append a TWEAK version if it exists:
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SET(ZLIB_VERSION_TWEAK "")
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IF( "${ZLIB_H}" MATCHES "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]+\\.([0-9]+).*$")
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SET(ZLIB_VERSION_TWEAK "${CMAKE_MATCH_1}")
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SET(ZLIB_VERSION_STRING "${ZLIB_VERSION_STRING}.${ZLIB_VERSION_TWEAK}")
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ENDIF( "${ZLIB_H}" MATCHES "^.*ZLIB_VERSION \"[0-9]+\\.[0-9]+\\.[0-9]+\\.([0-9]+).*$")
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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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ENDIF()
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#
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# inflatePrime was added in zlib 1.2.2.4 in 2005. We're guaranteed
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# to have it on Windows.
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#
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IF(WIN32)
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SET(HAVE_INFLATEPRIME ON)
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ELSE()
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INCLUDE(CMakePushCheckState)
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INCLUDE(CheckFunctionExists)
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CMAKE_PUSH_CHECK_STATE()
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set(CMAKE_REQUIRED_INCLUDES ${ZLIB_INCLUDE_DIR})
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set(CMAKE_REQUIRED_LIBRARIES ${ZLIB_LIBRARY})
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#
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# Check for inflate() in zlib, to make sure the zlib library is
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# usable.
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#
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# For example, on at least some versions of Fedora, if you have a
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# 64-bit machine, have both the 32-bit and 64-bit versions of the
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# run-time zlib package installed, and have only the *32-bit*
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# version of the zlib development package installed, it'll find the
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# header, and think it can use zlib, and will use it in subsequent
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# tests, but it'll try and link 64-bit test programs with the 32-bit
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# library, causing those tests to falsely fail. Hilarity ensues.
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#
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CHECK_FUNCTION_EXISTS("inflate" HAVE_INFLATE)
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IF(NOT HAVE_INFLATE)
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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)?")
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ENDIF()
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CHECK_FUNCTION_EXISTS("inflatePrime" HAVE_INFLATEPRIME)
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# reset
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CMAKE_POP_CHECK_STATE()
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ENDIF()
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AddWSWinDLL(ZLIB ZLIB_HINTS "zlib*")
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SET(ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR})
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SET(ZLIB_LIBRARIES ${ZLIB_LIBRARY})
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ELSE()
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SET(ZLIB_INCLUDE_DIRS )
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SET(ZLIB_LIBRARIES )
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SET(ZLIB_DLL_DIR )
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SET(ZLIB_DLL )
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SET(ZLIB_PDB )
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ENDIF()
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