在開發C和MYSQL應用程序時生成錯誤

Question

我正在寫一些連接到MYSQL服務器的C代碼。我正在使用Netbeans，對此也是新手。我按照指示配置它並安裝了MYSQL連接器C.我還從cygwin站點安裝了CYGWIN GCC，G ++，GDB，MAKE。我創建了一個c項目，並在properties-> build-> c compiler-> Include目錄中設置mysql連接器的路徑（C：\ Program Files \ MySQL \ Connector C 6.0.2 \ include）。現在我編寫一些代碼來與MYSQL服務器進行交互，在構建時會發生一些錯誤。

#include <stdio.h> 
#include <stdlib.h> 
#include <mysql.h> 


int main(int argc, char** argv) { 


MYSQL *conn; 
MYSQL_RES *res; 
MYSQL_ROW row; 
char *server = "localhost"; 
char *user = "root"; 
char *password = "aaaa"; /* set me first */ 
char *database = "mysql"; 
conn = mysql_init(NULL); 
/* Connect to database */ 
if (!mysql_real_connect(conn, server, 
    user, password, database, 0, NULL, 0)) { 
    fprintf(stderr, "%s\n", mysql_error(conn)); 
    exit(1); 
} 
/* send SQL query */ 
if (mysql_query(conn, "show tables")) { 
    fprintf(stderr, "%s\n", mysql_error(conn)); 
    exit(1); 
} 
res = mysql_use_result(conn); 
/* output table name */ 
printf("MySQL Tables in mysql database:\n"); 
while ((row = mysql_fetch_row(res)) != NULL) 
    printf("%s \n", row[0]); 
/* close connection */ 
mysql_free_result(res); 
mysql_close(conn); 

return (EXIT_SUCCESS); 
} 

生成以下錯誤出現後：

build/Debug/Cygwin-Windows/main.o: In function `main': 
/cygdrive/c/Documents and Settings/AEM/My  Documents/NetBeansProjects/CppApplication_2/main.c:26: undefined reference to `_mysql_init' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:28: undefined reference to  `_mysql_real_connect' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:30: undefined reference to `_mysql_error' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:34: undefined reference to `_mysql_query' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:35: undefined reference to `_mysql_error' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:38: undefined reference to `_mysql_use_result' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:41: undefined reference to `_mysql_fetch_row' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:44: undefined reference to `_mysql_free_result' 
/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2/main.c:45: undefined reference to `_mysql_close' 
make[2]: Leaving directory `/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2' 
make[1]: Leaving directory `/cygdrive/c/Documents and Settings/AEM/My Documents/NetBeansProjects/CppApplication_2' 
collect2: ld returned 1 exit status 
make[2]: *** [dist/Debug/Cygwin-Windows/cppapplication_2.exe] Error 1 
make[1]: *** [.build-conf] Error 2 
make: *** [.build-impl] Error 2 


BUILD FAILED (exit value 2, total time: 1s) 

我GOOGLE了很多，但找不到任何東西來解決這個問題。需要幫忙。

Answer 1

add -lmysql與mysql庫（適用於gcc）鏈接。或者，如果您使用其它編譯器，告訴編譯器

• 其中的lib（添加路徑）
• 到庫鏈接到可執行文件。這是不同的，然後添加路徑。