未定义对"crypt"的引用 [英] undefined reference to `crypt'

问题描述

我正在使用下面的代码，这些代码是我在网上找到的，尝试构建它时出现错误.编译正常.

I am using the below code that i found somewhere in the net and i am getting an error when i try to build it. The compilation is ok.

这是错误:

/tmp/ccCnp11F.o: In function `main':

crypt.c:(.text+0xf1): undefined reference to `crypt'

collect2: ld returned 1 exit status

这是代码:

#include <stdio.h>
 #include <time.h>
 #include <unistd.h>
 #include <crypt.h>

 int main()
 {
   unsigned long seed[2];
   char salt[] = "$1$........";
   const char *const seedchars =
     "./0123456789ABCDEFGHIJKLMNOPQRST"
     "UVWXYZabcdefghijklmnopqrstuvwxyz";
   char *password;
   int i;

   /* Generate a (not very) random seed.
      You should do it better than this... */
   seed[0] = time(NULL);
   seed[1] = getpid() ^ (seed[0] >> 14 & 0x30000);

   /* Turn it into printable characters from `seedchars'. */
   for (i = 0; i < 8; i++)
     salt[3+i] = seedchars[(seed[i/5] >> (i%5)*6) & 0x3f];

   /* Read in the user's password and encrypt it. */
   password = crypt(getpass("Password:"), salt);

   /* Print the results. */
   puts(password);
   return 0;
 }

推荐答案

crypt.c:(.text+0xf1): undefined reference to 'crypt'是链接器错误.

尝试与-lcrypt链接:gcc crypt.c -lcrypt.

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