find_package(ZLIB) if(NOT ZLIB_FOUND) message(STATUS "Using Athena's built-in zlib") add_library(z adler32.c compress.c crc32.c deflate.c infback.c inffast.c inflate.c inftrees.c trees.c uncompr.c zutil.c crc32.h deflate.h gzguts.h inffast.h inffixed.h inflate.h inftrees.h trees.h zconf.h zlib.h zutil.h) if(WIN32 AND NOT UNIX) install(FILES zconf.h zlib.h DESTINATION include COMPONENT zlib) install(TARGETS z DESTINATION lib COMPONENT zlib) endif() set(ZLIB_LIBRARIES z CACHE PATH "Zlib libraries" FORCE) set(ZLIB_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR} CACHE PATH "Zlib include path" FORCE) else() set(ZLIB_LIBRARIES ${ZLIB_LIBRARIES} CACHE PATH "Zlib libraries" FORCE) find_path(ZLIB_INCLUDE_DIR zlib.h) endif()