WhyCan Forum(哇酷开发者社区)

wget http://ftp.gnu.org/pub/gnu/ncurses/ncurses-5.6.tar.gz
tar zxvf ncurses-5.6.tar.gz
cd ncurses-5.6.tar.gz

su

./configure -host=arm-buildroot-linux-gnueabi -prefix=/ -enable-static

make -j2
make install DESTDIR=$PWD/tmp

echo 'main(){}'|arm-buildroot-linux-gnueabi-gcc  -E -v -

cd tmp
cp -rf include/* /home/lmnb/f1c100s/buildroot-2017.08/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/include
cp -rfd lib/* /home/lmnb/f1c100s/buildroot-2017.08/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/lib/

unzip mysql-5.1.73.zip

cp mysql-5.1.73 pc-mysql-5.1.73
mv mysql-5.1.73 arm-mysql-5.1.73

cd pc-mysql-5.1.73/
./configure -prefix=/usr
make -j2

cd arm-mysql-5.1.73/
vim configure

  { { $as_echo "$as_me:$LINENO: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
{ { $as_echo "$as_me:$LINENO: error: cannot run test program while cross compiling
See \`config.log' for more details." >&5
$as_echo "$as_me: error: cannot run test program while cross compiling
See \`config.log' for more details." >&2;}
   { (exit 1); exit 1; }; }; }

echo "skip....!"
#  { { $as_echo "$as_me:$LINENO: error: in \`$ac_pwd':" >&5
#$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
#{ { $as_echo "$as_me:$LINENO: error: cannot run test program while cross compiling
#See \`config.log' for more details." >&5
#$as_echo "$as_me: error: cannot run test program while cross compiling
#See \`config.log' for more details." >&2;}
#   { (exit 1); exit 1; }; }; }

./configure --host=arm-buildroot-linux-gnueabi --enable-static  --prefix=/usr --without-debug --without-docs --without-man --without-bench --with-charset=gb2312 --with-extra-charsets=ascii,latin1,utf8

make -j2
报错内容
./gen_lex_hash > lex_hash.h-t

cp ../pc-mysql-5.1.73/sql/gen_lex_hash
touch -m sql/gen_lex_hash

make
make install DESTDIR=$PWD/tmp

cd tmp/usr/
cp -rf bin/* /usr/bin
cp -rfd lib/mysql/* /usr/lib
cp -rf libexec/* /usr/libexec/
cp -rf share/mysql /usr/share/

cd /etc
vi my.cnf

[client]
port = 3306
socket = /tmp/mysql.sock
[mysqld]
port = 3306
datadir=/usr/var/data
socket=/tmp/mysql.sock
user=root
old_passwords=1
skip-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M
log-bin=mysql-bin
binlog_format=mixed
server-id = 1
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/lib/mysqld/mysqld.pid

[mysqldump]
quick
max_allowed_packet = 16M

[mysql]
no-auto-rehash

[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M

[mysqlhotcopy]
interactive-timeout

mkdir -p /var/lib/mysqld/
mkdir -p /var/log/
touch /var/lib/mysqld/mysqld.pid
mkdir -p /usr/var/data/

mysql_install_db -u root
mysqld_safe --user=root --skip-grant-tables --skip-networking &

cd /root/tmp/usr
cp share/mysql/mysql.server /etc/init.d/S90mysqld
cd /etc/init.d/

./S90mysqld start

mysql -h 192.168.43.198 -P 3306 -u lmnb -p
show databases;

/*************************************************************************
    > File Name: connect.c
    > Author: 杨永利
    > Mail: 1795018360@qq.com 
    > Created Time: 2020年08月14日 星期五 20时39分56秒
 ************************************************************************/

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <mysql/mysql.h>

// 定义连接时所需要的数据宏
#define HOST "192.168.43.198"    // 所连数据库的ip 127.0.0.1是本机ip
#define USER "lmnb"         // 数据库用户
#define PASSWORD "123456"   // 该用户密码（自设）
#define DBNAME "szjcxt"       // 要操作的数据库名

// 打印结果集函数
void show_result(MYSQL_RES * result)
{
	//打印表头
	unsigned int num_fields;
	unsigned int i;
    // MYSQL_FIELD 该结构包含关于字段的信息，如字段名、类型和大小
	MYSQL_FIELD *fields;
	// 返回结果集中的行数。
	num_fields = mysql_num_fields(result);
    // mysql_fetch_fields 对于结果集，返回所有MYSQL_FIELD结构的数组。每个结构提供了结果集中1列的字段定义。
	fields = mysql_fetch_fields(result);
    // 输出结果
	for(i = 0; i < num_fields; i++)
	{
	   printf("%s\t", fields[i].name);
	}
    // 这个输出是打造表的结构边框便于查看数据，准确的输出按照你的数据自行增加减去+号
	printf("\n+----+-------+\n");
	
	// 行数
	MYSQL_ROW row;
		num_fields = mysql_num_fields(result);//取字段个数
	while ((row = mysql_fetch_row(result)))//循环取一行
	{
	   for(i = 0; i < num_fields; i++)
	   {
           // 看是否为空
	       printf("%s\t",  row[i] ? row[i] : "NULL");
	   }
	   printf("\n");
	}
}


int main(int argc, char* argv[])
{
    // 定义mysql指针并初始化
    MYSQL *mysql=mysql_init(NULL);
    if(mysql== NULL)
    {
        printf("init err! 数据库初始化错误！\n");
        return -1;
    }
    // 初始化成功就连接数据库
    mysql = mysql_real_connect(mysql,HOST,USER,PASSWORD,DBNAME,0,NULL,0);
    if(mysql == NULL)
    {
        printf("connect err! 数据库连接失败！ \n");
        return -1;
    }
    printf("数据库连接成功！\n"); 
    
    // 定义查询语句
    char rSql[256]={0};
    // 我的表名为example
    strcpy(rSql,"select * from users");
    // 查询指向的SQL查询
    if(mysql_query(mysql,rSql) != 0){
    	printf("mysql_query err! 查询失败\n");
    	exit(1);
    }

    // 取回结果集
    int i=0;
    // mysql_store_result()将查询的全部结果读取到客户端，分配1个MYSQL_RES结构，并将结果置于该结构中。
    MYSQL_RES * result = mysql_store_result(mysql);
    MYSQL_ROW row;
    if(result != NULL){
    	//需要打印结果集
    	show_result(result);
		mysql_free_result(result);//释放结果集
    }
    // 最后关闭连接
    mysql_close(mysql);
    printf("数据库关闭成功！\n");
    return 0;
}

arm-buildroot-linux-gnueabi-gcc -o select select.c -lmysqlclient