Found the following significant warnings:
  redland.c:1564:29: warning: pointer targets in passing argument 2 of ‘librdf_digest_update’ differ in signedness [-Wpointer-sign]
  redland.c:1600:36: warning: pointer targets in passing argument 2 of ‘librdf_digest_update_string’ differ in signedness [-Wpointer-sign]
  redland.c:2211:46: warning: pointer targets in passing argument 2 of ‘librdf_new_uri’ differ in signedness [-Wpointer-sign]
  redland.c:2457:64: warning: pointer targets in passing argument 2 of ‘librdf_new_node_from_uri_string’ differ in signedness [-Wpointer-sign]
  redland.c:2536:73: warning: pointer targets in passing argument 3 of ‘librdf_new_node_from_uri_local_name’ differ in signedness [-Wpointer-sign]
  redland.c:2589:75: warning: pointer targets in passing argument 2 of ‘librdf_new_node_from_normalised_uri_string’ differ in signedness [-Wpointer-sign]
  redland.c:2638:61: warning: pointer targets in passing argument 2 of ‘librdf_new_node_from_literal’ differ in signedness [-Wpointer-sign]
  redland.c:2693:67: warning: pointer targets in passing argument 2 of ‘librdf_new_node_from_typed_literal’ differ in signedness [-Wpointer-sign]
  redland.c:2757:70: warning: pointer targets in passing argument 2 of ‘librdf_new_node_from_blank_identifier’ differ in signedness [-Wpointer-sign]
  redland.c:3810:74: warning: pointer targets in passing argument 4 of ‘librdf_model_add_string_literal_statement’ differ in signedness [-Wpointer-sign]
  redland.c:3869:73: warning: pointer targets in passing argument 4 of ‘librdf_model_add_typed_literal_statement’ differ in signedness [-Wpointer-sign]
  redland.c:5492:71: warning: pointer targets in passing argument 2 of ‘librdf_parser_parse_string_as_stream’ differ in signedness [-Wpointer-sign]
  redland.c:5545:60: warning: pointer targets in passing argument 2 of ‘librdf_parser_parse_string_into_model’ differ in signedness [-Wpointer-sign]
  redland.c:5599:79: warning: pointer targets in passing argument 2 of ‘librdf_parser_parse_counted_string_as_stream’ differ in signedness [-Wpointer-sign]
  redland.c:5661:68: warning: pointer targets in passing argument 2 of ‘librdf_parser_parse_counted_string_into_model’ differ in signedness [-Wpointer-sign]
  redland.c:5796:70: warning: pointer targets in passing argument 3 of ‘librdf_parser_guess_name2’ differ in signedness [-Wpointer-sign]
  redland.c:5796:89: warning: pointer targets in passing argument 4 of ‘librdf_parser_guess_name2’ differ in signedness [-Wpointer-sign]
  redland.c:5943:74: warning: pointer targets in passing argument 4 of ‘librdf_new_query’ differ in signedness [-Wpointer-sign]
See ‘/data/gannet/ripley/R/packages/tests-devel/redland.Rcheck/00install.out’ for details.