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Diffstat (limited to 'cmake/modules/FindZLIB.cmake')
| -rw-r--r-- | cmake/modules/FindZLIB.cmake | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/cmake/modules/FindZLIB.cmake b/cmake/modules/FindZLIB.cmake new file mode 100644 index 00000000..b6ac9858 --- /dev/null +++ b/cmake/modules/FindZLIB.cmake @@ -0,0 +1,150 @@ +# - 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(MSVC) + # else we'll find Strawberry Perl's version + set (_zlib_sys_env_option NO_SYSTEM_ENVIRONMENT_PATH) +endif() + +if (NOT ZLIB_INCLUDE_DIR OR NOT ZLIB_LIBRARY) + if (NOT USE_REPOSITORY) # else we'll find Strawberry Perl's pkgconfig + find_package(PkgConfig) + pkg_search_module(ZLIB zlib) + endif() + + 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" + ${_zlib_sys_env_option} + ) + + 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" + ${_zlib_sys_env_option} + ) +endif() +unset(_zlib_sys_env_option) +MARK_AS_ADVANCED(ZLIB_LIBRARY ZLIB_INCLUDE_DIR) + +# handle the QUIETLY and REQUIRED arguments and set ZLIB_FOUND to TRUE if +# all listed variables are TRUE +INCLUDE(FindPackageHandleStandardArgs) +FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZLIB REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR + VERSION_VAR ZLIB_VERSION_STRING) + +if(ZLIB_FOUND) + IF(ZLIB_INCLUDE_DIR AND EXISTS "${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() |