Question

我正在使用Mysql连接c program in eclipse，我正在使用CYGWIN编译器来编译程序。我已经安装了mysql c connector并将包含文件添加到编译器和链接器

但我收到错误

**** Build of configuration Debug for project DbConnectionC ****

make all 
Building file: ../connection.c
Invoking: Cygwin C Compiler
gcc -I"C:\Program Files (x86)\MySQL\MySQL Connector C 6.0.2\include" -include"C:\Program Files (x86)\MySQL\MySQL Connector C 6.0.2\include\mysql.h" -O0 -g3 -Wall -c -fmessage-length=0 -MMD -MP -MF"connection.d" -MT"connection.d" -o "connection.o" "../connection.c"
cygwin warning:
  MS-DOS style path detected: D:\java\workspace\DbConnectionC\Debug
  Preferred POSIX equivalent is: /cygdrive/d/java/workspace/DbConnectionC/Debug
  CYGWIN environment variable option "nodosfilewarning" turns off this warning.
  Consult the user's guide for more details about POSIX paths:
    http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
../connection.c: In function `main':
../connection.c:57: warning: char format, different type arg (arg 2)
../connection.c:57: warning: char format, different type arg (arg 2)
../connection.c:61: warning: char format, different type arg (arg 2)
../connection.c:61: warning: char format, different type arg (arg 2)
Finished building: ../connection.c

Building target: DbConnectionC.exe
Invoking: Cygwin C Linker
gcc -L"C:\Program Files (x86)\MySQL\MySQL Connector C 6.0.2\lib\opt" -o "DbConnectionC.exe"  ./connection.o   -llibmysql.lib -lmysqlclient.lib
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: cannot find -llibmysql.lib
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: cannot find -lmysqlclient.lib
collect2: ld returned 1 exit status
make: *** [DbConnectionC.exe] Error 1
makefile:29: recipe for target `DbConnectionC.exe' failed

**** Build Finished ****

请帮我解决这个问题提前谢谢

Answer 1

在第一部分中，您会对可能出现的问题发出一些警告：

../ connection.c：39：警告：隐式声明函数`exit'

这意味着未声明函数exit()，您的来源需要#include <stdlib.h>

../ connection.c:46:warning:control到达非空函数的结尾

您不会在main()的末尾返回值，如果程序成功，则添加return 0;。

第二部分是链接器警告：

/usr/lib/gcc/i686-pc-cygwin/3.4.4 /../../../../ i686-pc-cygwin / bin / ld：找不到-llibmysql.lib
/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld：找不到-lmysqlclient.lib

表示链接器需要指向库的路径，或者库不存在或库名称拼写错误。

一种可能的解决方案是使用-lmysql -lmysqlclient而不是-llibmysql.lib -lmysqlclient.lib，但我对Windows并不熟悉。

话虽如此，我强烈建议您查看https://stackoverflow.com/tags/c/info并查看一些图书链接。

在Eclipse中使用C程序连接MYSQL

1 个答案: