使用Microchip C30编译器进行Openpicus编译时的链接错误

我正在编译一个有很多外部库的项目。该项目有一些警告，但我相信它不应该妨碍.hex文件的创建。因此，当我编译项目时，我会得到一个链接错误列表

Compiling C:\liblwm2m\Libs\ExternalLib\heap.s

*                     Total program memory used (bytes):        0x28ef3  (167667) 64%

*                        Total data memory used (bytes):         0x360a  (13834) 84%
x_object_device.o(.text+0x688):C:\liblwm2m\Libs\ExternalLib\object_device.c: undefined reference to `strdup'
x_object_device.o(.text+0x68a):C:\liblwm2m\Libs\ExternalLib\object_device.c: undefined reference to `strdup'
x_object_device.o(.text+0x6b6):C:\liblwm2m\Libs\ExternalLib\object_device.c: undefined reference to `strdup'
x_object_device.o(.text+0x6b8):C:\liblwm2m\Libs\ExternalLib\object_device.c: undefined reference to `strdup'
x_object_device.o(.text+0x6e4):C:\liblwm2m\Libs\ExternalLib\object_device.c: undefined reference to `strdup'
x_object_device.o(.text+0x6e6):C:\liblwm2m\Libs\ExternalLib\object_device.c: more undefined references to `strdup' follow
x_observe.o(.text+0x3c2):C:\liblwm2m\Libs\ExternalLib\observe.c: undefined reference to `object_read'
x_observe.o(.text+0x3c4):C:\liblwm2m\Libs\ExternalLib\observe.c: undefined reference to `object_read'
x_liblwm2m.o(.text+0x86):C:\liblwm2m\Libs\ExternalLib\liblwm2m.c: undefined reference to `strdup'
x_liblwm2m.o(.text+0x88):C:\liblwm2m\Libs\ExternalLib\liblwm2m.c: undefined reference to `strdup'
x_management.o(.text+0x48):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_read'
x_management.o(.text+0x4a):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_read'
x_management.o(.text+0xa6):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_create'
x_management.o(.text+0xa8):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_create'
x_management.o(.text+0x154):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_isInstanceNew'
x_management.o(.text+0x156):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_isInstanceNew'
x_management.o(.text+0x16e):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_create'
x_management.o(.text+0x170):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_create'
x_management.o(.text+0x188):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_write'
x_management.o(.text+0x18a):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_write'
x_management.o(.text+0x1a2):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_execute'
x_management.o(.text+0x1a4):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_execute'
x_management.o(.text+0x1da):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_write'
x_management.o(.text+0x1dc):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_write'
x_management.o(.text+0x208):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_delete'
x_management.o(.text+0x20a):C:\liblwm2m\Libs\ExternalLib\management.c: undefined reference to `object_delete'
x_registration.o(.text+0x8c):C:\liblwm2m\Libs\ExternalLib\registration.c: undefined reference to `prv_getRegisterPayload'
x_registration.o(.text+0x8e):C:\liblwm2m\Libs\ExternalLib\registration.c: undefined reference to `prv_getRegisterPayload'
  C:\Program Files\Microchip\MPLAB C30\bin\bin/pic30-coff-bin2hex.exe: a.cof could not be opened.
The system cannot find the file specified.
---------------------------------- COMPILING ERROR ---------------------------------------

这里是由openpicus支持的strdup函数，我也声明了它。令我惊讶的是，该程序编译正确，但抛出链接错误。有什么想法吗

---

提前感谢

这些是代码中的错误 对

strdup'的未定义引用
对对象的未定义引用

object\u read' 对

对象\u create'的未定义引用
对对象的未定义引用\u isInstanceNew'
对
对象\u create'的未定义引用
对对象的未定义引用
object\u write'
对
对象\u execute'的未定义引用
对对象的未定义引用
object\u write'
对
对象的未定义引用\u delete'
未定义对
prv_getRegisterPayload'的引用
注意，这些不是警告

该错误表示没有函数“strdup”的定义，“prv_getRegisterPayload”。链接器找不到对这些例程的引用，并以链接时间错误终止。不链接意味着不生成十六进制文件，这是所有工具链的标准行为

检查已附加到项目的库。添加具有这些例程的引用/定义的库，然后代码应该可以很好地构建

将产生类似错误的伪代码如下所示：

extern void parabola ();
int main(void)
{
    parabola ();   // ERROR here "undefined reference to `parabola'
}

--函数抛物线的定义在哪里？难道不是吗

void parabola ()
{}
int main(void)
{
    parabola ();   // Builds like magic
}