Question

我不知道问题是什么。我正在尝试构建我的项目以供发布，但链接器抱怨没有找到外部符号。

奇怪的是我复制＆amp;粘贴从 Debug 到 Release 构建配置的所有包含路径和依赖项，并仔细检查它。

get_PC_definition()例如在cpudefs.h声明：

/* Return register definition of instruction pointer */
extern RegisterDefinition * get_PC_definition(Context * ctx);

这个函数有一些实现 - 我选择的是由宏控制的，所以是的，我也定义了所有必需的宏：

RegisterDefinition * get_PC_definition(Context * ctx) {
    static RegisterDefinition * reg_def = NULL;

    if (!context_has_state(ctx)) 
        return NULL;

    // and so on ..

    return reg_def;
}

cpudefs.obj到目前为止构建，但链接器只是嘲笑...也许我已经对错误视而不见但是就像我说的那样，我将配置从 Debug 复制到< em>发布构建配置。

我能尝试什么想法？

错误输出：

Error   43  error LNK1120: 9 unresolved externals   C:\svn\AgentSib\Release\agentsib.exe    agentsib
Error   31  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\registers.obj  agentsib
Error   32  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\runctrl.obj    agentsib
Error   34  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\symbols_cdb.obj    agentsib
Error   35  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\cpudefs.obj    agentsib
Error   36  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\expressions.obj    agentsib
Error   37  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\funccall.obj   agentsib
Error   38  error LNK2001: unresolved external symbol _get_PC_definition    C:\svn\AgentSib\AgentSib\profiler_sst.obj   agentsib
Error   41  error LNK2019: unresolved external symbol _BREAK_INST referenced in function _get_break_instruction C:\svn\AgentSib\AgentSib\cpudefs.obj    agentsib
Error   27  error LNK2019: unresolved external symbol _cpu_bp_get_capabilities referenced in function _context_get_supported_bp_access_types    C:\svn\AgentSib\AgentSib\context-sib.obj    agentsib
Error   30  error LNK2019: unresolved external symbol _cpu_bp_on_resume referenced in function _sib_resume  C:\svn\AgentSib\AgentSib\context-sib.obj    agentsib
Error   28  error LNK2019: unresolved external symbol _cpu_bp_plant referenced in function _context_plant_breakpoint    C:\svn\AgentSib\AgentSib\context-sib.obj    agentsib
Error   29  error LNK2019: unresolved external symbol _cpu_bp_remove referenced in function _context_unplant_breakpoint C:\svn\AgentSib\AgentSib\context-sib.obj    agentsib
Error   42  error LNK2019: unresolved external symbol _crawl_stack_frame referenced in function _trace_stack    C:\svn\AgentSib\AgentSib\stacktrace.obj agentsib
Error   33  error LNK2019: unresolved external symbol _get_PC_definition referenced in function _command_get_children_cache_client  C:\svn\AgentSib\AgentSib\stacktrace.obj agentsib
Error   39  error LNK2019: unresolved external symbol _ini_cpudefs_mdep referenced in function _ini_cpudefs C:\svn\AgentSib\AgentSib\cpudefs.obj    agentsib
Error   40  error LNK2019: unresolved external symbol _regs_index referenced in function _get_reg_by_dwarf_id   C:\svn\AgentSib\AgentSib\cpudefs.obj    agentsib

修改

调用函数get_PC_definition()

static int set_debug_regs(Context * ctx, int check_ip, int * step_over_hw_bp) {
    int i;
    int ret;
    uint32_t dr7      = 0;
    ContextAddress ip = 0;
    ContextExtensioni8051 * dext = EXT(ctx);
    ContextExtensioni8051 * bps  = EXT(context_get_group(ctx, CONTEXT_GROUP_BREAKPOINT));
    RegisterDefinition *reg_def  = NULL;

    ret = 0;

    if (check_ip) {

        *step_over_hw_bp = 0;

        reg_def = get_PC_definition(ctx);
        ret     = context_read_reg(ctx, reg_def, 0, reg_def->size, &ip);

        if ( ret < 0 )
            return -1;
    }

    return 0;
}

Answer 1

这个问题＆＃34; Visual Studio 2010's strange "warning LNK4042"＆＃34;解决了我的问题。

毕竟这是编译器导致的链接器问题..

在Configuratoin Properties >> C/C++ >> Output Files >> Object File Name下我用于两个配置$(IntDir)，而它适用于 Debug 但不适用于 Release 。有人知道为什么吗？

将其更改为

$(IntDir)\%(RelativeDir)

是节省我一天的解决方案。

LNK1120，LNK2001，LNK2019 - 无法追查原因

1 个答案: