Question

我正在尝试向LambdaMOO服务器添加文件实用程序补丁，但是链接程序始终为目标文件之一中的变量提供“未定义符号”错误。我不认为我的问题与顶部链接的问题/答案或一堆“未定义的建筑符号...”帖子相同，除非我弄糟了头文件。这不是不包括库的情况。我不知道该错误是什么意思或引起它的原因。

 Undefined symbols:
   "register_files()", referenced from:
       bi_function_registries       in functions.o
 ld: symbol(s) not found

register_files（）在头文件中声明为外部，并在files.c中定义。

files.h

extern void register_files(void);

files.c

void
register_files(void)
{ 
    (void) register_function("fileappend",  3,  3, bf_fileappend,  TYPE_STR, TYPE_STR, TYPE_LIST);

#ifdef INCLUDE_FILECHMOD
    (void) register_function("filechmod",   3,  3, bf_filechmod,   TYPE_STR, TYPE_STR, TYPE_STR);
#endif

    (void) register_function("filedelete",  2,  2, bf_filedelete,  TYPE_STR, TYPE_STR);
    (void) register_function("fileerror",   0,  0, bf_fileerror);
    (void) register_function("fileexists",  2,  2, bf_fileexists,  TYPE_STR, TYPE_STR);
    (void) register_function("fileextract", 4,  5, bf_fileextract, TYPE_STR, TYPE_STR, TYPE_STR, TYPE_STR, TYPE_STR);
    (void) register_function("filegrep",    3,  4, bf_filegrep,    TYPE_STR, TYPE_STR, TYPE_STR, TYPE_STR);
    (void) register_function("fileinfo",    2,  2, bf_fileinfo,    TYPE_STR, TYPE_STR);
    (void) register_function("filelength",  2,  2, bf_filelength,  TYPE_STR, TYPE_STR);
    (void) register_function("filelist",    1,  2, bf_filelist,    TYPE_STR, TYPE_STR);
    (void) register_function("filemkdir",   2,  2, bf_filemkdir,   TYPE_STR, TYPE_STR);
    (void) register_function("fileread",    2,  4, bf_fileread,    TYPE_STR, TYPE_STR, TYPE_INT, TYPE_INT);
    (void) register_function("filerename",  3,  3, bf_filerename,  TYPE_STR, TYPE_STR, TYPE_STR);
    (void) register_function("filermdir",   2,  2, bf_filermdir,   TYPE_STR, TYPE_STR);

#ifdef INCLUDE_FILERUN
    (void) register_function("filerun",     1, -1, bf_filerun,     TYPE_STR, TYPE_LIST, TYPE_LIST); 
#endif

    (void) register_function("filesize",    2,  2, bf_filesize,    TYPE_STR, TYPE_STR);
    (void) register_function("fileversion", 0,  0, bf_fileversion);
    (void) register_function("filewrite",   3,  5, bf_filewrite,   TYPE_STR, TYPE_STR, TYPE_LIST, TYPE_INT, TYPE_INT);
    (void) register_function("fileinsert",  3,  5, bf_fileinsert,  TYPE_STR, TYPE_STR, TYPE_LIST, TYPE_INT, TYPE_INT);
    (void) register_function("filecut",     2,  4, bf_filecut,     TYPE_STR, TYPE_STR, TYPE_INT,  TYPE_INT);
}

functions.cc

typedef void (*registry) ();

static registry bi_function_registries[] =
{
    register_collection,
    register_disassemble,
    register_extensions,
    register_execute,
    register_functions,
    register_list,
    register_log,
    register_map,
    register_numbers,
    register_objects,
    register_property,
    register_server,
    register_tasks,
    register_verbs,
    register_yajl,
    register_base64,
    register_fileio,
    register_exec,
    register_builtins,
    register_files

};


void
register_bi_functions()
{
    int loop, num_registries =
    sizeof(bi_function_registries) / sizeof(bi_function_registries[0]);

    for (loop = 0; loop < num_registries; loop++)
    (void) (*(bi_function_registries[loop])) ();
}

“未定义符号”是什么意思？

0 个答案: