c - 这个 `ld` 错误 ("undefined reference") 是什么意思？

Question

这个错误是什么意思？

/tmp/ccevEqoI.o: In function `main':
funcptr.c:(.text+0x61): undefined reference to `AddALL'
collect2: ld returned 1 exit status

我正在尝试编写一个将所有整数相加到极限的函数 由用户输入。

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转录的“答案”是来自 OP 的评论:

I wrote a program that would add all the integers upto the limit Specified. For that I had to write a function. So I made a function called 'AddAll' but when I called it from my program I called it as 'AddALL'.

Note: C is case sensitive. Eventually when I changed the name of the function where I was calling it. It compiled perfectly :)

Just thought that this piece of info would be useful to beginners.

Answer 1

这意味着链接器(在 gcc 中称为 ld)没有在指定的目标文件中找到符号 AddALL。基本上，该函数没有主体，或者它是一个声明为 extern 且没有定义的变量。