如何在 C 中链接目标文件?因“架构 x86_64 的未定义符号"而失败； [英] How do I link object files in C? Fails with "Undefined symbols for architecture x86_64"

问题描述

所以我试图在我的文件 (file2.c) 中使用另一个 C (file1.c) 文件中定义的函数.为了做到这一点，我包含了 file1 (file1.h) 的头文件.

So I'm trying trying to use a function defined in another C (file1.c) file in my file (file2.c). I'm including the header of file1 (file1.h) in order to do this.

然而，每当我尝试使用 gcc 编译我的文件时，我总是收到以下错误:

However, I keep getting the following error whenever I try to compile my file using gcc:

Undefined symbols for architecture x86_64:
  "_init_filenames", referenced from:
      _run_worker in cc8hoqCM.o
  "_read_list", referenced from:
      _run_worker in cc8hoqCM.o
ld: symbol(s) not found for architecture x86_64

有人告诉我，我需要将目标文件链接在一起"才能使用文件 2 中的文件 1 中的函数，但我不知道这意味着什么:(

I've been told I need to "link the object files together" in order to use the functions from file1 in file2, but I have no clue what that means :(

推荐答案

我假设你正在使用 gcc，来简单地链接目标文件:

I assume you are using gcc, to simply link object files do:

$ gcc -o output file1.o file2.o

要获得目标文件，只需使用

To get the object-files simply compile using

$ gcc -c file1.c

这会产生 file1.o 等等.

this yields file1.o and so on.

如果要将文件链接到可执行文件，请执行

If you want to link your files to an executable do

$ gcc -o output file1.c file2.c

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