“error LNK2001：未解析的外部符号” [英] "error LNK2001: unresolved external symbol"

问题描述

我在VC ++ 2008中的我的程序有一个问题
当我编译它，列出以下错误。我在groups.google.com上花了很多
的时间来找出原因，但没有任何评论
无法帮助我。任何机构知道什么是问题吗？
感谢。

 错误LNK2001：未解析的外部符号long rfl_xref_id（？rfl_xref_id @@ 3JA）
错误LNK2001：无法解析的外部符号结构obj_name * pat_objname_list（pat_objname_list @@ 3PAUobj_name @@？A）
错误LNK2001：无法解析的外部符号结构obj_name * pat_recall_objname_list（？pat_recall_objname_list @@ 3PAUobj_name @@ A）
错误LNK2001：未解析的外部符号wchar_t * rfl_unresolved_xref_tag（？rfl_unresolved_xref_tag @@ 3PA_WA）
错误LNK2001：未解析的外部符号struct ref_pages * rfl_pages（？rfl_pages @@ 3PAUref_pages @@ A）
错误LNK2001：未解析的外部符号short rfl_use_regen_id（？rfl_use_regen_id @@ 3FA）
错误LNK2001：未解决的外部符号long rfl_regen_id（？rfl_regen_id @@ 3JA）
错误LNK2001：未解析的外部符号无符号短rfl_list_status
错误LNK2001（rfl_list_status @@ 3GA）：无法解析的外部符号无符号短rfl_inst_hdr_page
错误LNK2001（rfl_inst_hdr_page @@ 3GA）：无法解析的外部符号无符号短rfl_inst_hdr_ptr（？ rfl_inst_hdr_ptr @@ 3GA）
错误LNK2001：未解析的外部符号unsigned short rfl_inst_obj（？rfl_inst_obj @@ 3GA）
错误LNK2001：未解决的外部符号short rfl_instance_level（？rfl_instance_level @@ 3FA）
错误LNK2001：（？rfl_access_mode @@ 3FA）解析外部符号短rfl_access_mode
错误LNK2001：无法解析的外部符号长rfl_select_ref_offset
错误LNK2001（rfl_select_ref_offset @@ 3JA）：解析的外部符号长rfl_edit_ref_id（？rfl_edit_ref_id @@ 3JA）
错误LNK2001：（？rfl_add_att_offset @@ 3JA）解析外部符号长rfl_add_att_offset
错误LNK2001：无法解析的外部符号短rfl_adding_ent_data（rfl_adding_ent_data @ @ 3FA）
错误LNK2001：未解决的外部符号long rfl_xref_def_inst_ukey（？rfl_xref_def_inst_ukey @@ 3JA）
错误LNK2001：未解决的外部符号long rfl_xref_def_ukey（？rfl_xref_def_ukey @@ 3JA）
错误LNK2001：未解析外部符号long rfl_instance_ukey（？rfl_instance_ukey @@ 3JA）
错误LNK2001：未解析外部符号long rfl_ref_id（？rfl_ref_id @@ 3JA）
错误LNK2001：未解析外部符号unsigned short rfl_next_page_num
错误LNK2001（rfl_next_page_num @@ 3GA）：无法解析的外部符号无符号短rfl_num_pages（？rfl_num_pages @@ 3GA）
错误LNK2001：无法解析的外部符号？无符号短rfl_page_size（rfl_page_size @ @ 3GA）
错误LNK2001：未解析的外部符号struct ref_pages * rfl_cur_page（？rfl_cur_page @@ 3PAUref_pages @@ A）
错误LNK2001：未解析的外部符号struct ref_def_map * rfl_recall_map（？rfl_recall_map @@ 3PAUref_def_map @@ A）
错误LNK2001：无法解析的外部符号结构ref_xref_image * rfl_image_list（rfl_image_list @@ 3PAUref_xref_image @@ A）
错误LNK2001：？解析的外部符号结构ref_xref_refresh * rfl_refresh_info（rfl_refresh_info @@ 3PAUref_xref_refresh @@ A）
错误LNK2001：未解析的外部符号short * rfl_form_status（？rfl_form_status @@ 3PAFA）
错误LNK2001：未解决的外部符号short rfl_num_forms（？rfl_num_forms @@ 3FA） 
错误LNK2001：未解析的外部符号long rfl_recall_start_id（？rfl_recall_start_id @@ 3JA）
错误LNK2001：未解析的外部符号long rfl_recall_end_id（？rfl_recall_end_id @@ 3JA）
 error LNK2001：unresolved外部符号结构ref_pages rfl_begin_add_page
错误LNK2001（rfl_begin_add_page @@ 3Uref_pages @@？A）：解析的外部符号长rfl_add_length
错误LNK2001（rfl_add_length @@ 3JA）：无法解析的外部符号结构ref_pages rfl_found_page（？rfl_found_page @@ 3Uref_pages @@ A）
错误LNK2001：未解析的外部符号short rfl_scan_status（？rfl_scan_status @@ 3FA）
错误LNK2001：未解析的外部符号struct ref_pages rfl_scan_info ？rfl_scan_info @@ 3Uref_pages @@ A）
错误LNK2001：无法解析的外部符号结构ref_recall_xrefs * rfl_xref_list（rfl_xref_list @@ 3PAUref_recall_xrefs @@ A）
错误LNK2001：无法解析的外部符号结构ref_xref_image * rfl_recall_image_list （？rfl_recall_image_list @@ 3PAUref_xref_image @@ A）
错误LNK2001：未解析的外部符号struct ref_xref_image * rfl_found_image（？rfl_found_image @@ 3PAUref_xref_image @@ A）
  pre> 
 
 
我已经包含了intdef.h文件，其内容是所有上述外部符号的定义。 Intdef.h包含：
  extern struct ref_pages * rfl_pages; 
 extern struct ref_pages * rfl_cur_page; 
 extern struct ref_pages rfl_begin_add_page; 
 extern struct ref_pages rfl_scan_info; 
 extern struct ref_pages rfl_found_page; 
 extern struct ref_def_map * rfl_recall_map; 
 extern struct ref_select_info * rfl_select; 
 extern struct ref_recall_xrefs * rfl_xref_list; 
 extern struct ref_xref_image * rfl_image_list; 
 extern struct ref_xref_image * rfl_found_image; 
 extern struct ref_xref_image * rfl_recall_image_list; 
 extern struct ref_xref_refresh * rfl_refresh_info; 
 extern unsigned short rfl_page_size; 
 extern unsigned short rfl_num_pages; 
 extern unsigned short rfl_next_page_num; 
 extern unsigned short rfl_inst_obj; 
 extern unsigned short rfl_inst_hdr_ptr; 
 extern unsigned short rfl_inst_hdr_page; 
 extern unsigned short rfl_list_status; 
 extern short rfl_adding_ent_data; 
 extern short rfl_scan_status; 
 extern short rfl_access_mode; 
 extern short rfl_instance_level; 
 extern short rfl_redraw_layer; 
 extern long rfl_add_length; 
 extern long rfl_ref_id; 
 extern long rfl_edit_ref_id; 
 extern long rfl_recall_start_id; 
 extern long rfl_recall_end_id; 
 extern long rfl_import_ref_id; 
 extern long rfl_import_xref_id; 
 extern long rfl_xref_id; 
 extern long rfl_instance_ukey; 
 extern long rfl_xref_def_ukey; 
 extern long rfl_xref_def_inst_ukey; 
 extern length rfl_add_att_offset; 
 extern long rfl_select_ref_offset; 
 extern long rfl_regen_id; 
 extern double * rfl_extents; 
 extern _TCHAR ** rfl_ref_names; 
 extern short rfl_use_regen_id; 
 extern short rfl_ref_cntr; 
 extern short rfl_num_forms; 
 extern short * rfl_form_status; 
 extern _TCHAR * rfl_xref_fpath; 
 extern _TCHAR * rfl_xref_name; 
 extern _TCHAR * rfl_xref_ref_name; 
 extern _TCHAR * rfl_xref_ref_label; 
 extern _TCHAR * rfl_unresolved_xref_tag; 
 extern _TCHAR rfl_tran_is_iso; 
 extern _TCHAR rfl_doing_area; 
 extern int rfl_nv; 
 extern double * rfl_ar; 
 extern short rfl_regen_xref_mode; 
  
 
 
解决方案
我认为问题是'extern' 。该关键字指定那些值在代码中的其他地方声明。也许你缺少另一个.c / .cpp文件来编译，其中包含这些变量的声明。同样，你包含这个头文件实际上不是定义任何变量 - 它只是要求它们存在别的地方！
 
I have a problem with my program in VC++ 2008
When I compile it, the following errors are listed. I spend a lot of
time on the groups.google.com to find its reason, but none of comments
could not help me. Does any body know what is the problem?.
Thanks.
error LNK2001: unresolved external symbol "long rfl_xref_id" (?rfl_xref_id@@3JA)
error LNK2001: unresolved external symbol "struct obj_name * pat_objname_list" (?pat_objname_list@@3PAUobj_name@@A)
error LNK2001: unresolved external symbol "struct obj_name * pat_recall_objname_list" (?pat_recall_objname_list@@3PAUobj_name@@A)
error LNK2001: unresolved external symbol "wchar_t * rfl_unresolved_xref_tag" (?rfl_unresolved_xref_tag@@3PA_WA)
error LNK2001: unresolved external symbol "struct ref_pages * rfl_pages" (?rfl_pages@@3PAUref_pages@@A)
error LNK2001: unresolved external symbol "short rfl_use_regen_id" (?rfl_use_regen_id@@3FA)
error LNK2001: unresolved external symbol "long rfl_regen_id" (?rfl_regen_id@@3JA)
error LNK2001: unresolved external symbol "unsigned short rfl_list_status" (?rfl_list_status@@3GA)
error LNK2001: unresolved external symbol "unsigned short rfl_inst_hdr_page" (?rfl_inst_hdr_page@@3GA)
error LNK2001: unresolved external symbol "unsigned short rfl_inst_hdr_ptr" (?rfl_inst_hdr_ptr@@3GA)
error LNK2001: unresolved external symbol "unsigned short rfl_inst_obj" (?rfl_inst_obj@@3GA)
error LNK2001: unresolved external symbol "short rfl_instance_level" (?rfl_instance_level@@3FA)
error LNK2001: unresolved external symbol "short rfl_access_mode" (?rfl_access_mode@@3FA)
error LNK2001: unresolved external symbol "long rfl_select_ref_offset" (?rfl_select_ref_offset@@3JA)
error LNK2001: unresolved external symbol "long rfl_edit_ref_id" (?rfl_edit_ref_id@@3JA)
error LNK2001: unresolved external symbol "long rfl_add_att_offset" (?rfl_add_att_offset@@3JA)
error LNK2001: unresolved external symbol "short rfl_adding_ent_data" (?rfl_adding_ent_data@@3FA)
error LNK2001: unresolved external symbol "long rfl_xref_def_inst_ukey" (?rfl_xref_def_inst_ukey@@3JA)
error LNK2001: unresolved external symbol "long rfl_xref_def_ukey" (?rfl_xref_def_ukey@@3JA)
error LNK2001: unresolved external symbol "long rfl_instance_ukey" (?rfl_instance_ukey@@3JA)
error LNK2001: unresolved external symbol "long rfl_ref_id" (?rfl_ref_id@@3JA)
error LNK2001: unresolved external symbol "unsigned short rfl_next_page_num" (?rfl_next_page_num@@3GA)
error LNK2001: unresolved external symbol "unsigned short rfl_num_pages" (?rfl_num_pages@@3GA)
error LNK2001: unresolved external symbol "unsigned short rfl_page_size" (?rfl_page_size@@3GA)
error LNK2001: unresolved external symbol "struct ref_pages * rfl_cur_page" (?rfl_cur_page@@3PAUref_pages@@A)
error LNK2001: unresolved external symbol "struct ref_def_map * rfl_recall_map" (?rfl_recall_map@@3PAUref_def_map@@A)
error LNK2001: unresolved external symbol "struct ref_xref_image * rfl_image_list" (?rfl_image_list@@3PAUref_xref_image@@A)
error LNK2001: unresolved external symbol "struct ref_xref_refresh * rfl_refresh_info" (?rfl_refresh_info@@3PAUref_xref_refresh@@A)
error LNK2001: unresolved external symbol "short * rfl_form_status" (?rfl_form_status@@3PAFA)
error LNK2001: unresolved external symbol "short rfl_num_forms" (?rfl_num_forms@@3FA)
error LNK2001: unresolved external symbol "long rfl_recall_start_id" (?rfl_recall_start_id@@3JA)
error LNK2001: unresolved external symbol "long rfl_recall_end_id" (?rfl_recall_end_id@@3JA)
error LNK2001: unresolved external symbol "struct ref_pages rfl_begin_add_page" (?rfl_begin_add_page@@3Uref_pages@@A)
error LNK2001: unresolved external symbol "long rfl_add_length" (?rfl_add_length@@3JA)
error LNK2001: unresolved external symbol "struct ref_pages rfl_found_page" (?rfl_found_page@@3Uref_pages@@A)
error LNK2001: unresolved external symbol "short rfl_scan_status" (?rfl_scan_status@@3FA)
error LNK2001: unresolved external symbol "struct ref_pages rfl_scan_info" (?rfl_scan_info@@3Uref_pages@@A)
error LNK2001: unresolved external symbol "struct ref_recall_xrefs * rfl_xref_list" (?rfl_xref_list@@3PAUref_recall_xrefs@@A)
error LNK2001: unresolved external symbol "struct ref_xref_image * rfl_recall_image_list" (?rfl_recall_image_list@@3PAUref_xref_image@@A)
error LNK2001: unresolved external symbol "struct ref_xref_image * rfl_found_image" (?rfl_found_image@@3PAUref_xref_image@@A)
I have included "intdef.h" file which contents the definition of all the above external symbol. Intdef.h contains:
extern struct ref_pages *rfl_pages;
extern struct ref_pages *rfl_cur_page;
extern struct ref_pages rfl_begin_add_page;
extern struct ref_pages rfl_scan_info;
extern struct ref_pages rfl_found_page;
extern struct ref_def_map *rfl_recall_map;
extern struct ref_select_info *rfl_select;
extern struct ref_recall_xrefs *rfl_xref_list;
extern struct ref_xref_image *rfl_image_list;
extern struct ref_xref_image *rfl_found_image;
extern struct ref_xref_image *rfl_recall_image_list;
extern struct ref_xref_refresh *rfl_refresh_info;
extern unsigned short rfl_page_size;
extern unsigned short rfl_num_pages;
extern unsigned short rfl_next_page_num;
extern unsigned short rfl_inst_obj;
extern unsigned short rfl_inst_hdr_ptr;
extern unsigned short rfl_inst_hdr_page;
extern unsigned short rfl_list_status;
extern short rfl_adding_ent_data;
extern short rfl_scan_status;
extern short rfl_access_mode;
extern short rfl_instance_level;
extern short rfl_redraw_layer;
extern long rfl_add_length;
extern long rfl_ref_id;
extern long rfl_edit_ref_id;
extern long rfl_recall_start_id;
extern long rfl_recall_end_id;
extern long rfl_import_ref_id;
extern long rfl_import_xref_id;
extern long rfl_xref_id;
extern long rfl_instance_ukey;
extern long rfl_xref_def_ukey;
extern long rfl_xref_def_inst_ukey;
extern long rfl_add_att_offset;
extern long rfl_select_ref_offset;
extern long rfl_regen_id;
extern double *rfl_extents;
extern _TCHAR **rfl_ref_names;
extern short rfl_use_regen_id;
extern short rfl_ref_cntr;
extern short rfl_num_forms;
extern short *rfl_form_status;
extern _TCHAR *rfl_xref_fpath;
extern _TCHAR *rfl_xref_name;
extern _TCHAR *rfl_xref_ref_name;
extern _TCHAR *rfl_xref_ref_label;
extern _TCHAR *rfl_unresolved_xref_tag;
extern _TCHAR rfl_tran_is_iso;
extern _TCHAR rfl_doing_area;
extern int rfl_nv;
extern double *rfl_ar;
extern short rfl_regen_xref_mode;

解决方案
I think the problem is with the 'extern' keyword. That keyword specifies that those values be declared somewhere else in your code. Perhaps you're missing another .c/.cpp file to compile which contains the declarations of those variables. Again, your inclusion of this header file isn't actually defining any variables -- it's just requiring that they exist somewhere else!

                        
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