cmake YARP_HAS_ZLIB examples

robotology/yarp src/libYARP_dev/src/CMakeLists.txt :352 

target_compile_definitions(YARP_dev PRIVATE YARP_HAS_ZLIB)

robotology/yarp src/libYARP_sig/src/CMakeLists.txt :166 

target_compile_definitions(YARP_sig PRIVATE YARP_HAS_ZLIB)