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COPASI / data /CMakeModules /FindZLIB.cmake

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# Copyright (C) 2022 - 2025 by Pedro Mendes, Rector and Visitors of the 
# University of Virginia, University of Heidelberg, and University 
# of Connecticut School of Medicine. 
# All rights reserved. 

# - Try to find the Zlib XML parsing library 

# Once done this will define
#
#  ZLIB_FOUND       - system has Zlib
#  ZLIB_LIBRARIES   - Link these to use Zlib
#  ZLIB_INCLUDE_DIR - Include directory for using Zlib
#  ZLIB_DEFINITIONS - Compiler switches required for using Zlib
#
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.


MACRO (FIND_ZLIB)

ENDMACRO ()

string(TOUPPER ${PROJECT_NAME} _UPPER_PROJECT_NAME)
set(_PROJECT_DEPENDENCY_DIR ${_UPPER_PROJECT_NAME}_DEPENDENCY_DIR)

# Check if we have cached results in case the last round was successful.
if (NOT (ZLIB_INCLUDE_DIR AND ZLIB_LIBRARY) OR NOT ZLIB_FOUND)

    set(ZLIB_LDFLAGS)
	
    find_path(ZLIB_INCLUDE_DIR zlib.h zlib/zlib.h
	    PATHS $ENV{ZLIB_DIR}/include
	          $ENV{ZLIB_DIR}
              ${${_PROJECT_DEPENDENCY_DIR}}/include
	          ~/Library/Frameworks
	          /Library/Frameworks
	          /sw/include        # Fink
	          /opt/local/include # MacPorts
	          /opt/csw/include   # Blastwave
	          /opt/include
	          /usr/freeware/include
              CMAKE_FIND_ROOT_PATH_BOTH
              NO_DEFAULT_PATH)

    if (NOT ZLIB_INCLUDE_DIR)
        find_path(ZLIB_INCLUDE_DIR zlib.h zlib/zlib.h
        CMAKE_FIND_ROOT_PATH_BOTH )
    endif ()

    find_library(ZLIB_LIBRARY 
	    NAMES zdll.lib z zlib.lib libzlib zlib libzlib.a libzdll.a
	    PATHS $ENV{ZLIB_DIR}/lib
	          $ENV{ZLIB_DIR}/lib-dbg
	          $ENV{ZLIB_DIR}
              ${${_PROJECT_DEPENDENCY_DIR}}/${CMAKE_INSTALL_LIBDIR}
              ${${_PROJECT_DEPENDENCY_DIR}}/lib
              ${${_PROJECT_DEPENDENCY_DIR}}
	          ~/Library/Frameworks
	          /Library/Frameworks
	          /sw/lib        # Fink
	          /opt/local/lib # MacPorts
	          /opt/csw/lib   # Blastwave
	          /opt/lib
	          /usr/freeware/lib64
              CMAKE_FIND_ROOT_PATH_BOTH
             NO_DEFAULT_PATH)

    if (NOT ZLIB_LIBRARY)
        find_library(ZLIB_LIBRARY NAMES zdll.lib z zlib.lib libzlib zlib libzlib.a libzdll.a
        CMAKE_FIND_ROOT_PATH_BOTH )
    endif ()

    if (NOT WIN32)
        find_package(PkgConfig)
        pkg_check_modules(PC_ZLIB QUIET zlib)

        message(VERBOSE "${PC_ZLIB_STATIC_LDFLAGS}")

        if (PC_ZLIB_FOUND)
            set(ZLIB_DEFINITIONS ${PC_ZLIB_CFLAGS_OTHER})
            set(ZLIB_VERSION ${PC_ZLIB_VERSION} CACHE STRING "Zlib Version found" )
        endif (PC_ZLIB_FOUND)
    endif (NOT WIN32)
    
    
    # make sure that we have a valid zip library
    file(TO_CMAKE_PATH "${ZLIB_LIBRARY}" LIBZ_CMAKE_PATH)
    include (CheckLibraryExists)
    check_library_exists("${LIBZ_CMAKE_PATH}" "gzopen" "" LIBZ_FOUND_SYMBOL)
    if(NOT LIBZ_FOUND_SYMBOL)
        # this is odd, but on windows this check always fails! must be a
        # bug in the current cmake version so for now only issue this
        # warning on linux
        if(UNIX)
            message(WARNING
"The chosen zlib library does not appear to be valid because it is
missing certain required symbols. Please check that ${LIBZ_LIBRARY} is
the correct zlib library. For details about the error, please see
CMakeError.log or CMakeConfigureLog.yaml in the build directory.")
        endif()
    endif()

    mark_as_advanced(ZLIB_INCLUDE_DIR ZLIB_LIBRARY)

endif () # Check for cached values

# create an zlib target to link against
if(NOT TARGET ZLIB::ZLIB)
  add_library(ZLIB::ZLIB UNKNOWN IMPORTED)
  set_target_properties(ZLIB::ZLIB PROPERTIES
    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
    IMPORTED_LOCATION "${ZLIB_LIBRARY}"
    INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_INCLUDE_DIR}")
endif()


include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(
    ZLIB
    VERSION_VAR   ZLIB_VERSION
    REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR)

mark_as_advanced(ZLIB_VERSION)

	# Copyright (C) 2022 - 2025 by Pedro Mendes, Rector and Visitors of the
	# University of Virginia, University of Heidelberg, and University
	# of Connecticut School of Medicine.
	# All rights reserved.

	# - Try to find the Zlib XML parsing library

	# Once done this will define
	#
	# ZLIB_FOUND - system has Zlib
	# ZLIB_LIBRARIES - Link these to use Zlib
	# ZLIB_INCLUDE_DIR - Include directory for using Zlib
	# ZLIB_DEFINITIONS - Compiler switches required for using Zlib
	#
	# Redistribution and use is allowed according to the terms of the BSD license.
	# For details see the accompanying COPYING-CMAKE-SCRIPTS file.


	MACRO (FIND_ZLIB)

	ENDMACRO ()

	string(TOUPPER ${PROJECT_NAME} _UPPER_PROJECT_NAME)
	set(_PROJECT_DEPENDENCY_DIR ${_UPPER_PROJECT_NAME}_DEPENDENCY_DIR)

	# Check if we have cached results in case the last round was successful.
	if (NOT (ZLIB_INCLUDE_DIR AND ZLIB_LIBRARY) OR NOT ZLIB_FOUND)

	set(ZLIB_LDFLAGS)

	find_path(ZLIB_INCLUDE_DIR zlib.h zlib/zlib.h
	PATHS $ENV{ZLIB_DIR}/include
	$ENV{ZLIB_DIR}
	${${_PROJECT_DEPENDENCY_DIR}}/include
	~/Library/Frameworks
	/Library/Frameworks
	/sw/include # Fink
	/opt/local/include # MacPorts
	/opt/csw/include # Blastwave
	/opt/include
	/usr/freeware/include
	CMAKE_FIND_ROOT_PATH_BOTH
	NO_DEFAULT_PATH)

	if (NOT ZLIB_INCLUDE_DIR)
	find_path(ZLIB_INCLUDE_DIR zlib.h zlib/zlib.h
	CMAKE_FIND_ROOT_PATH_BOTH )
	endif ()

	find_library(ZLIB_LIBRARY
	NAMES zdll.lib z zlib.lib libzlib zlib libzlib.a libzdll.a
	PATHS $ENV{ZLIB_DIR}/lib
	$ENV{ZLIB_DIR}/lib-dbg
	$ENV{ZLIB_DIR}
	${${_PROJECT_DEPENDENCY_DIR}}/${CMAKE_INSTALL_LIBDIR}
	${${_PROJECT_DEPENDENCY_DIR}}/lib
	${${_PROJECT_DEPENDENCY_DIR}}
	~/Library/Frameworks
	/Library/Frameworks
	/sw/lib # Fink
	/opt/local/lib # MacPorts
	/opt/csw/lib # Blastwave
	/opt/lib
	/usr/freeware/lib64
	CMAKE_FIND_ROOT_PATH_BOTH
	NO_DEFAULT_PATH)

	if (NOT ZLIB_LIBRARY)
	find_library(ZLIB_LIBRARY NAMES zdll.lib z zlib.lib libzlib zlib libzlib.a libzdll.a
	CMAKE_FIND_ROOT_PATH_BOTH )
	endif ()

	if (NOT WIN32)
	find_package(PkgConfig)
	pkg_check_modules(PC_ZLIB QUIET zlib)

	message(VERBOSE "${PC_ZLIB_STATIC_LDFLAGS}")

	if (PC_ZLIB_FOUND)
	set(ZLIB_DEFINITIONS ${PC_ZLIB_CFLAGS_OTHER})
	set(ZLIB_VERSION ${PC_ZLIB_VERSION} CACHE STRING "Zlib Version found" )
	endif (PC_ZLIB_FOUND)
	endif (NOT WIN32)


	# make sure that we have a valid zip library
	file(TO_CMAKE_PATH "${ZLIB_LIBRARY}" LIBZ_CMAKE_PATH)
	include (CheckLibraryExists)
	check_library_exists("${LIBZ_CMAKE_PATH}" "gzopen" "" LIBZ_FOUND_SYMBOL)
	if(NOT LIBZ_FOUND_SYMBOL)
	# this is odd, but on windows this check always fails! must be a
	# bug in the current cmake version so for now only issue this
	# warning on linux
	if(UNIX)
	message(WARNING
	"The chosen zlib library does not appear to be valid because it is
	missing certain required symbols. Please check that ${LIBZ_LIBRARY} is
	the correct zlib library. For details about the error, please see
	CMakeError.log or CMakeConfigureLog.yaml in the build directory.")
	endif()
	endif()

	mark_as_advanced(ZLIB_INCLUDE_DIR ZLIB_LIBRARY)

	endif () # Check for cached values

	# create an zlib target to link against
	if(NOT TARGET ZLIB::ZLIB)
	add_library(ZLIB::ZLIB UNKNOWN IMPORTED)
	set_target_properties(ZLIB::ZLIB PROPERTIES
	IMPORTED_LINK_INTERFACE_LANGUAGES "C"
	IMPORTED_LOCATION "${ZLIB_LIBRARY}"
	INTERFACE_INCLUDE_DIRECTORIES "${ZLIB_INCLUDE_DIR}")
	endif()


	include(FindPackageHandleStandardArgs)

	find_package_handle_standard_args(
	ZLIB
	VERSION_VAR ZLIB_VERSION
	REQUIRED_VARS ZLIB_LIBRARY ZLIB_INCLUDE_DIR)

	mark_as_advanced(ZLIB_VERSION)