Warnings when compiling mod_cluster

Solaris
gives the following warning at compile time

"mod_advertise.c", line 683: warning: implicit function declaration: getpid
"mod_advertise.c", line 798: warning: argument #5 is incompatible with prototype:
prototype: pointer to const void : "/tmp/xbroot/ROOT/include/httpd/ap_provider.h", line 50
argument : pointer to function(pointer to struct request_rec {pointer to struct apr_pool_t

{..} pool, pointer to struct conn_rec {..}

connection, pointer to struct server_rec

{..} server, pointer to struct request_rec {..}

next, pointer to struct request_rec

{..} prev, pointer to struct request_rec {..}

main, pointer to char the_request, int assbackwards, int proxyreq, int header_only, pointer to char protocol, int proto_num, pointer to const char hostname, long request_time, pointer to const char status_line, int status, pointer to const char method, int method_number, long allowed, pointer to struct apr_array_header_t

{..} allowed_xmethods, pointer to struct ap_method_list_t {..}

allowed_methods, long sent_bodyct, long bytes_sent, long mtime, int chunked, pointer to const char range, long clength, long remaining, long read_length, int read_body, int read_chunked, unsigned int expecting_100, pointer to struct apr_table_t

{..} headers_in, pointer to struct apr_table_t {..}

headers_out, pointer to struct apr_table_t

{..} err_headers_out, pointer to struct apr_table_t {..}

subprocess_env, pointer to struct apr_table_t

{..} notes, pointer to const char content_type, pointer to const char handler, pointer to const char content_encoding, pointer to struct apr_array_header_t {..}

content_languages, pointer to char vlist_validator, pointer to char user, pointer to char ap_auth_type, int no_cache, int no_local_copy, pointer to char unparsed_uri, pointer to char uri, pointer to char filename, pointer to char canonical_filename, pointer to char path_info, pointer to char args, struct apr_finfo_t

{..} finfo, struct apr_uri_t {..}

parsed_uri, int used_path_info, pointer to struct ap_conf_vector_t

{..} per_dir_config, pointer to struct ap_conf_vector_t {..}

request_config, pointer to const struct htaccess_result

{..} htaccess, pointer to struct ap_filter_t {..}

output_filters, pointer to struct ap_filter_t

{..} input_filters, pointer to struct ap_filter_t {..}

proto_output_filters, pointer to struct ap_filter_t

{..}

proto_input_filters, int eos_sent}) returning void