cmake HAVE_EXTATTR_SET_LINK examples

libarchive/libarchive CMakeLists.txt :1867 

CHECK_FUNCTION_EXISTS(extattr_set_link HAVE_EXTATTR_SET_LINK)

bareos/bareos core/cmake/BareosCheckFunctions.cmake :38 

check_function_exists(extattr_set_link HAVE_EXTATTR_SET_LINK)