[英]implicit declaration of function [-Wimplicit-function-declaration]
[英]error: implicit declaration of function 'rl_replace_line' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
我試圖在我的代碼中實現 rl_replace_line() 但是當我嘗試像這樣編譯它時:
gcc -lreadline test.c -o test
我收到此錯誤消息:
error: implicit declaration of function 'rl_replace_line' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
但是我認為我使用了好的 header 文件? 這是我的代碼:
# include <stdio.h>
# include <readline/readline.h>
# include <readline/history.h>
# include <unistd.h>
# include <stdlib.h>
char *get_line()
{
char *line;
line = NULL;
if (line)
{
free(line);
line = NULL;
}
line = readline("Minishell>");
if (line)
add_history(line);
return (line);
}
void sig_handler(int signum)
{
if (signum == SIGINT)
{
printf("\n");
rl_on_new_line();
rl_replace_line("", 0);
rl_redisplay();
}
}
int main(void)
{
char *line;
signal(SIGINT, sig_handler);
line = get_line();
printf("%s\n", line);
}
我不明白為什么它不起作用,我希望你們能幫助謝謝!
我設法通過包含正確的路徑來解決我的問題:
-L.brew/opt/readline/lib
和-I.brew/opt/readline/include
現在我像這樣編譯並且它正在工作:
gcc test.c -o test -lreadline -L .brew/opt/readline/lib -I .brew/opt/readline/include
我通過使用命令 ==> find / -name libreadline.a 2> /dev/null 找到 libreadline.a 來解決這個問題。
結果是 ==> /opt/homebrew/Cellar/readline/8.1.2/lib/libreadline.a
所以我把正確的編譯路徑:-L libs -lft -L /opt/homebrew/Cellar/readline/8.1.2/lib -lreadline。
不,這是完美的工作
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