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From:Deepak Shrestha Date:August 13 2008 7:26am
Subject:Re: Undefined Reference Error
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Deepak Shrestha wrote:
> Hi,
>
> I am getting a strange "Undefined Reference Error" when trying to 
> build a modified "Simple1.cpp" example file. Here is the code:
>
> main.cpp
> =================================
> #include <iostream>
> #include <mysql++.h>
>
> using namespace std;
>
>
> int main()
> {
>    const char *db = "mydb", *server = "mysrvr", *user = "deepak", 
> *pass = "myapp";
>
>    //connect to database
>    mysqlpp::Connection conn(false); //<--- ERROR SHOWS UP HERE
>
>    if (conn.connect(db, server, user, pass))
>    {
>        mysqlpp::Query query = conn.query("SELECT * FROM Category");
>        if (mysqlpp::StoreQueryResult res = query.store())
>        {
>            cout << "Movie Categories are:" << endl;
>            for (size_t i = 0; i < res.num_rows(); i++)
>            {
>                cout << '\t' << res[i][0] << endl;
>            }
>        }
>        else
>        {
>            cerr << "Failed to get the Movie category list." << endl;
>            return 1;
>        }
>        return 0;
>    }
>    else
>    {
>        cerr << "DB connection failed: " << conn.error() << endl;
>        return 1;
>    }
>
> }
> ===============================
>
>
> and the error message is:
> ===============================
> ||=== SimpleSQLPPTest, Debug ===|
> obj\Debug\main.o||In function `main':|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|12|undefined 
> reference to `_imp___ZN7mysqlpp10ConnectionC1Eb'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|14|undefined 
> reference to `mysqlpp::Connection::connect(char const*, char const*, 
> char const*, char const*, unsigned int)'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|16|undefined 
> reference to `_imp___ZN7mysqlpp10Connection5queryEPKc'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|22|undefined 
> reference to `_imp___ZN7mysqlpplsERSoRKNS_6StringE'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|28|undefined 
> reference to `mysqlpp::Connection::~Connection()'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|30|undefined 
> reference to `mysqlpp::Connection::~Connection()'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|34|undefined 
> reference to `_imp___ZNK7mysqlpp10Connection5errorEv'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|35|undefined 
> reference to `mysqlpp::Connection::~Connection()'|
> D:\CODE_BLOCKS_WORKSPACE\SimpleSQLPPTest\main.cpp|35|undefined 
> reference to `mysqlpp::Connection::~Connection()'|
> obj\Debug\main.o||In function `ZTv0_n12_N7mysqlpp5QueryD0Ev':|
>
> C:\MySQL++\include\result.h:(.text$_ZN7mysqlpp5Query5storeEv[mysqlpp::Query::store()]+0x4d)||undefined
> 
> reference to `_imp___ZN7mysqlpp5Query3strERNS_13SQLQueryParmsE'|
>
> C:\MySQL++\include\result.h:(.text$_ZN7mysqlpp5Query5storeEv[mysqlpp::Query::store()]+0x73)||undefined
> 
> reference to `_imp___ZN7mysqlpp14SQLTypeAdapterC1ERKSsb'|
>
> C:\MySQL++\include\result.h:(.text$_ZN7mysqlpp5Query5storeEv[mysqlpp::Query::store()]+0x95)||undefined
> 
> reference to `_imp___ZN7mysqlpp5Query5storeERKNS_14SQLTypeAdapterE'|
> ||=== Build finished: 12 errors, 0 warnings ===|
>
> ==================================
>
> I can see that it successfully compiles but this error shows up during 
> the linking process.
>
> I am trying to use MySQL++ in WindowsXP-MingW environment. I am still 
> catching up with the examples to be confident enough to do something 
> using this API.
>
> Any Suggestions? I am completely new in this topic.
>
> Thanks!
>
As suggested in my previous thread http://lists.mysql.com/plusplus/7854 
, I had read the FAQ on link errors and I have "mysqlpp.a", 
"mysqlpp.dll" in my C:\MySQL++\lib. Also "mysqlclient.a" and 
"mysqlclient.lib" are present in C:\Program Files\MySQL\MySQL Server 
5.0\lib\opt. I followed the "README-MinGW.txt" for building this and 
built examples are working.


Thread
Undefined Reference ErrorDeepak Shrestha12 Aug
  • Re: Undefined Reference ErrorDeepak Shrestha13 Aug
    • Re: Undefined Reference ErrorWarren Young13 Aug
      • Re: Undefined Reference ErrorDeepak Shrestha13 Aug
        • Re: Undefined Reference ErrorDeepak Shrestha13 Aug