C语言Bug记录

在学习用C语言写个简单的Lisp语言

源代码如下:

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

int main(int argc, char *argv[]) {
    puts("Lispy Version 0.1");
    puts("Press Ctrl+c to Exit\n");
    while(1){
        char* input = readline("lispy> ");
        add_history(input);
        printf("no you're a %s\n",input);
        free(input);
    }
    return 0;
}

bug1:fatal error: 'editline/history.h' file not found

解决:

1. 移除#include <editline/history.h>

出现:

Undefined symbols for architecture x86_64:
  "_add_history", referenced from:
      _main in Untitled 4-73916f.o
  "_readline", referenced from:
      _main in Untitled 4-73916f.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

解决:
增加编译参数:
-std=c99 -Wall -ledit

-Wall 是将产生尽可能多的警告信息 ,-ledit是链接edit库(猜测)

记录一个搜索问题,当我谷歌 gcc -Wall的时候没有搜到想要的信息,想起几天前看的搜索技巧,可能把-后的参数去除了,于是再次搜索"gcc -Wall",加了引号,搜到了结果,注:mac是用cc编译的,但是cc -Wall没有搜索想要的信息,于是换成了gcc