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# FindLFortranZLIB.cmake
# Finds the ZLIB compression library for LFortran
#
# Respects the USE_DYNAMIC_ZLIB variable:
# OFF (default): Search for static libraries first (.a, .lib)
# ON: Search for dynamic libraries first (.so, .dylib, .dll), then static
#
# If USE_DYNAMIC_ZLIB is OFF but no static library is available, fall back to
# a default search so builds work on systems that do not ship static zlib.
# Backup the original value of the requested library suffixes
set(_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
if (USE_DYNAMIC_ZLIB)
if(WIN32)
set(CMAKE_FIND_LIBRARY_SUFFIXES .dll .lib .a)
elseif(APPLE)
set(CMAKE_FIND_LIBRARY_SUFFIXES .dylib .so .a .lib)
else()
set(CMAKE_FIND_LIBRARY_SUFFIXES .so .a .lib)
endif()
else()
# Prefer static libraries first
set(CMAKE_FIND_LIBRARY_SUFFIXES .a .lib)
endif()
find_package(ZLIB QUIET)
# Reset the library suffixes to the original value
set(CMAKE_FIND_LIBRARY_SUFFIXES ${_CMAKE_FIND_LIBRARY_SUFFIXES})
# Unset the temporary to not pollute the global namespace
unset(_CMAKE_FIND_LIBRARY_SUFFIXES)
if (NOT ZLIB_FOUND OR NOT ZLIB_LIBRARY)
unset(ZLIB_FOUND)
unset(ZLIB_LIBRARY CACHE)
unset(ZLIB_LIBRARIES CACHE)
find_package(ZLIB REQUIRED)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LFortranZLIB DEFAULT_MSG ZLIB_LIBRARY
ZLIB_INCLUDE_DIRS)
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