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# Finds zlib.
#
# This module defines:
# ZLIB_INCLUDE_DIR
# ZLIB_LIBRARY
#
# There is no default installation for zlib on Windows so a
# XTrackCAD specific directory tree is assumed
#
if(WIN32)
set(ZLIBBASEDIR "$ENV{XTCEXTERNALROOT}/${XTRKCAD_ARCH_SUBDIR}/zlib" )
find_path( ZLIB_INCLUDE_DIR zlib.h
PATHS ${ZLIBBASEDIR} "${ZLIBBASEDIR}/include"
DOC "The directory where zlib.h resides")
find_library( ZLIB_LIBRARY
NAMES zlibstatic
PATHS ${ZLIBBASEDIR} "${ZLIBBASEDIR}/lib"
DOC "The zlib library")
else()
find_package(PkgConfig)
pkg_check_modules(PC_ZLIB QUIET zlib)
find_path(ZLIB_INCLUDE_DIR
NAMES zlib.h
HINTS ${PC_ZLIB_INCLUDE_DIRS})
find_library(ZLIB_LIBRARY
NAMES z)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(
Zlib
REQUIRED_VARS
ZLIB_LIBRARY
ZLIB_INCLUDE_DIR
)
if(Zlib_FOUND)
mark_as_advanced(
ZLIB_LIBRARY
ZLIB_INCLUDE_DIR
)
endif()
if(Zlib_FOUND AND NOT TARGET Zlib::Zlib)
add_library(Zlib::Zlib UNKNOWN IMPORTED)
set_property(TARGET Zlib::Zlib PROPERTY IMPORTED_LOCATION ${ZLIB_LIBRARY})
target_include_directories(Zlib::Zlib INTERFACE ${ZLIB_INCLUDE_DIR})
if (ZLIB_INCLUDE_DIR)
file(READ "${ZLIB_INCLUDE_DIR}/zlib.h" _ZLIB_VERSION_CONTENTS)
if (_ZLIB_VERSION_CONTENTS)
string(REGEX REPLACE ".*#define ZLIB_VERSION \"([0-9a-z.]+)\".*" "\\1" ZLIB_VERSION "${_ZLIB_VERSION_CONTENTS}")
endif ()
endif ()
set(ZLIB_VERSION ${ZLIB_VERSION} CACHE STRING "Version number of zlib")
endif()
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