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未定义的参考`的readline” [重复](undefined reference to `rea

2019-07-19 14:39发布

这个问题已经在这里有一个答案:

  • 反编译库时,“未定义参考”错误 2个回答

我有一个问题,尝试运行GNU的Readline库示例代码中提供维基百科 。 这里有云:

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <readline/readline.h>
#include <readline/history.h>

int main()
{
    char* input, shell_prompt[100];

    // Configure readline to auto-complete paths when the tab key is hit.
    rl_bind_key('\t', rl_complete);

    for(;;) {
        // Create prompt string from user name and current working directory.
        snprintf(shell_prompt, sizeof(shell_prompt), "%s:%s $ ", getenv("USER"), getcwd(NULL, 1024));

        // Display prompt and read input (n.b. input must be freed after use)...
        input = readline(shell_prompt);

        // Check for EOF.
        if (!input)
            break;

        // Add input to history.
        add_history(input);

        // Do stuff...

        // Free input.
        free(input);
    }
}

我工作的一个受限制的环境中的readline是不可用的,所以我不得不下载源代码,编译并安装到我的主目录。

这里面我的家目录结构:

.local
├── include
│   └── readline
│       ├── chardefs.h
│       ├── history.h
│       ├── keymaps.h
│       ├── readline.h
│       ├── rlconf.h
│       ├── rlstdc.h
│       ├── rltypedefs.h
│       └── tilde.h
└── lib
    ├── libhistory.a
    ├── libhistory.so -> libhistory.so.6
    ├── libhistory.so.6 -> libhistory.so.6.2
    ├── libhistory.so.6.2
    ├── libreadline.a
    ├── libreadline.so -> libreadline.so.6
    ├── libreadline.so.6 -> libreadline.so.6.2
    └── libreadline.so.6.2

问题是,当我叫GCC它将引发我一个错误:

$ gcc hello.c -o hello_c.o -I /home/my-home-dir/.local/include
/tmp/cckC236E.o: In function `main':
hello.c:(.text+0xa): undefined reference to `rl_complete'
hello.c:(.text+0x14): undefined reference to `rl_bind_key'
hello.c:(.text+0x60): undefined reference to `readline'
hello.c:(.text+0x77): undefined reference to `add_history'
collect2: error: ld returned 1 exit status

有关于这个答案在这里 ,但我不使用NetBeans,我不太清楚如何指定要在命令行上库的路径。

我想告诉在库链接,但结果还是一样:

$ gcc hello.c -o hello_c.o -I /home/my-home-dir/.local/include -Xlinker "-L /home/my-home-dir/.local/lib"
/tmp/cceiePMr.o: In function `main':
hello.c:(.text+0xa): undefined reference to `rl_complete'
hello.c:(.text+0x14): undefined reference to `rl_bind_key'
hello.c:(.text+0x60): undefined reference to `readline'
hello.c:(.text+0x77): undefined reference to `add_history'
collect2: error: ld returned 1 exit status

任何想法我可能会丢失吗?

Answer 1:

你需要在反对票GCC参数使用-lreadline实际库进行链接



文章来源: undefined reference to `readline' [duplicate]