A very strange problem(about the code structure when set mib2c -S cache=0)

A very strange problem(about the code structure when set mib2c -S cache=0)
 When my uit.h file is something like this:
  
  
 [SKIP]
void initialize_table_hostInterFCTable(void);
Netsnmp_Node_Handler hostInterFCTable_handler;
Netsnmp_First_Data_Point  hostInterFCTable_get_first_data_point;
Netsnmp_Next_Data_Point   hostInterFCTable_get_next_data_point;
NetsnmpCacheLoad hostInterFCTable_load;
NetsnmpCacheFree hostInterFCTable_free;
#define HOSTINTERFCTABLE_TIMEOUT  60
[SKIP]
  
  
 I got something like this:
 
[SKIP]
uit.c: In function ‘init_uit’:
uit.c:189: warning: useless type name in empty declaration
uit.c: At top level:
uit.c:2852: error: conflicting types for ‘hostInterFCTable_free’
uit.h:93: error: previous declaration of ‘hostInterFCTable_free’ was here
[SKIP]
  
  
 and uit.c source code correspond like this:
  
 [SKIP]
    /* Typical data structure for a row entry */
struct hostInterFCTable_entry {
    /* Index values */
[SKIP]
     /* Illustrate using a simple linked list */
    int   valid;
    struct hostInterFCTable_entry *next;
};
 struct hostInterFCTable_entry  *hostInterFCTable_head;
 /* create a new row in the (unsorted) table */
struct hostInterFCTable_entry *
hostInterFCTable_createEntry(
[SKIP]
                ) {
    struct hostInterFCTable_entry *entry;
     entry = SNMP_MALLOC_TYPEDEF(struct hostInterFCTable_entry);
    if (!entry)
        return NULL;
 [SKIP]
}
 /*  # Determine the first/last column names */
 /** Initialize the hostInterFCTable table by defining its contents and how it's structured */
void
initialize_table_hostInterFCTable(void)
{
    PRINT_SNMP(__FUNCTION__,__LINE__);
     static oid hostInterFCTable_oid[] = {1,3,6,1,4,1,30901,2090,7000,2,1,5,1};
    size_t hostInterFCTable_oid_len   = OID_LENGTH(hostInterFCTable_oid);
    netsnmp_handler_registration    *reg;
    netsnmp_iterator_info           *iinfo;
    netsnmp_table_registration_info *table_info;
     reg = netsnmp_create_handler_registration(
              "hostInterFCTable",     hostInterFCTable_handler,
              hostInterFCTable_oid, hostInterFCTable_oid_len,
              HANDLER_CAN_RONLY
              );
     table_info = SNMP_MALLOC_TYPEDEF( netsnmp_table_registration_info );
    netsnmp_table_helper_add_indexes(table_info,
                           ASN_INTEGER,  /* tableindex: fcIndexNum */
                           0);
    table_info->min_column = COLUMN_FCPORT;
    table_info->max_column = COLUMN_FCLOGINNUMS;
     iinfo = SNMP_MALLOC_TYPEDEF( netsnmp_iterator_info );
    iinfo->get_first_data_point = hostInterFCTable_get_first_data_point;
    iinfo->get_next_data_point  = hostInterFCTable_get_next_data_point;
    iinfo->table_reginfo        = table_info;
     netsnmp_register_table_iterator( reg, iinfo );
    PRINT_SNMP(__FUNCTION__,__LINE__);
    netsnmp_inject_handler_before( reg,
        netsnmp_get_cache_handler(HOSTINTERFCTABLE_TIMEOUT,
                                  hostInterFCTable_load, hostInterFCTable_free,
                                  hostInterFCTable_oid, hostInterFCTable_oid_len),
            TABLE_ITERATOR_NAME);
     /* XXXX Initialise the contents of the table here. */
}
/* remove a row from the table */
void
hostInterFCTable_removeEntry( struct hostInterFCTable_entry *entry ) {
 int
hostInterFCTable_load( netsnmp_cache *cache, void *vmagic ) {
    FILE *fp;
    struct hostInterFCTable_entry *this;
    char buf[STRMAX];
     fp = fopen( "/data/for/hostInterFCTable", "r" );
    while ( fgets( buf, STRMAX, fp )) {
        this = SNMP_MALLOC_TYPEDEF( struct hostInterFCTable_entry );
        /* Unpick 'buf' and populate 'this' */
         this->next = hostInterFCTable_head;
        hostInterFCTable_head = this;    /* Iterate helper is fine with unordered lists! */
    }
    fclose(fp);
}
 int
hostInterFCTable_free( netsnmp_cache *cache, void *vmagic ) {
    struct hostInterFCTable_entry *this, *that;
     for ( this = hostInterFCTable_head; this; this=that ) {
        that = this->next;
        SNMP_FREE( this );   /* XXX - release any other internal resources */
    }
    hostInterFCTable_head = NULL;
}
 /* Example iterator hook routines - using 'get_next' to do most of the work */
netsnmp_variable_list *
hostInterFCTable_get_first_data_point([SKIP])
 netsnmp_variable_list *
hostInterFCTable_get_next_data_point([SKIP])
int
hostInterFCTable_handler([SKIP])
[SKIP]
 if I modified the uit.h like this
 [SKIP]
void initialize_table_hostInterFCTable(void);
Netsnmp_Node_Handler hostInterFCTable_handler;
Netsnmp_First_Data_Point  hostInterFCTable_get_first_data_point;
Netsnmp_Next_Data_Point   hostInterFCTable_get_next_data_point;
NetsnmpCacheLoad hostInterFCTable_load;
// NetsnmpCacheFree hostInterFCTable_free;
#define HOSTINTERFCTABLE_TIMEOUT  60
[SKIP]
  
 I got the wrong information like this:
  
 [SKIP]
uit.c: In function ‘init_uit’:
uit.c:189: warning: useless type name in empty declaration
uit.c: In function ‘initialize_table_hostInterFCTable’:
uit.c:2766: error: ‘hostInterFCTable_free’ undeclared (first use in this function)
uit.c:2766: error: (Each undeclared identifier is reported only once
uit.c:2766: error: for each function it appears in.)
uit.c: At top level:
[SKIP]
  
 I was muddled by this situation,I didnot use -S cache=0 command got my generated code first,and then I use the -S cache=0 got the generated code,and modified the code file in order to testing the net-snmp cache up-to-date problem,the previous code version worked perfect right.
  
 Dave,tell me where I am wrong again.Thank you !

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