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# - Find zlib
# Find the native ZLIB includes and library
#
# ZLIB_INCLUDE_DIR - where to find zlib.h, etc.
# ZLIB_LIBRARIES - List of libraries when using zlib.
# ZLIB_FOUND - True if zlib found.
if (ZLIB_INCLUDE_DIR)
# Already in cache, be silent
set(ZLIB_FIND_QUIETLY TRUE)
endif (ZLIB_INCLUDE_DIR)
find_path(ZLIB_INCLUDE_DIR zlib.h)
# On win32, qt statically links to zlib and libpng, and exports their symbols.
# We can just link to Qt to get zlib and libpng. We still require the user to
# supply their own headers on the search path, but they can and should just
# specify ${QTDIR}/src/3rdparty/zlib/include .
# To use this, you must use FindQt before FindZlib.
if(QT_QTCORE_LIBRARY AND USE_QT_ZLIB_PNGLIB)
message("Using zlib from qt")
set(ZLIB_LIBRARY_RELEASE ${QT_QTCORE_LIBRARY_RELEASE})
set(ZLIB_LIBRARY_DEBUG ${QT_QTCORE_LIBRARY_DEBUG})
set(ZLIB_LIBRARY ${QT_QTCORE_LIBRARY})
else(QT_QTCORE_LIBRARY AND USE_QT_ZLIB_PNGLIB)
set(ZLIB_NAMES_RELEASE ${ZLIB_NAMES_RELEASE} ${ZLIB_NAMES} z zlib zdll zlib1)
find_library(ZLIB_LIBRARY_RELEASE NAMES ${ZLIB_NAMES_RELEASE} )
# Find a debug library if one exists and use that for debug builds.
# This really only does anything for win32, but does no harm on other
# platforms.
set(ZLIB_NAMES_DEBUG ${ZLIB_NAMES_DEBUG} zlibd zlib1d)
find_library(ZLIB_LIBRARY_DEBUG NAMES ${ZLIB_NAMES_DEBUG})
include(LibraryDebugAndRelease)
SET_LIBRARY_FROM_DEBUG_AND_RELEASE(ZLIB)
endif(QT_QTCORE_LIBRARY AND USE_QT_ZLIB_PNGLIB)
# 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 DEFAULT_MSG ZLIB_LIBRARY ZLIB_INCLUDE_DIR)
if(ZLIB_FOUND)
set( ZLIB_LIBRARIES ${ZLIB_LIBRARY} )
else(ZLIB_FOUND)
set( ZLIB_LIBRARIES )
endif(ZLIB_FOUND)
mark_as_advanced( ZLIB_LIBRARY ZLIB_INCLUDE_DIR )
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