trying the following code to test SQL connection to MS SQL server using machine DNS name. receiving errors: [linker error] undefined reference to 'SQLAllocEnv@4' [linker error] undefined reference to 'SQLAllocConnect@8' (etc. for all SQL function calls in the code) using Dev-C++ 4.9.9.2 and the latest mingw WindowsAPI package (where the sql header files are) I've found others who have had the same problem, but no solution - going nuts! test code: #include <windows.h> #include <sqlext.h> #include <cstdlib> #include <iostream> int main(int argc, char *argv[]) { HENV hEnv = NULL; // Env Handle from SQLAllocEnv() HDBC hDBC = NULL; // Connection handle HSTMT hStmt = NULL;// Statement handle UCHAR szDSN[SQL_MAX_DSN_LENGTH] = 'mydsn';// Data Source Name buffer UCHAR szUID[13] = 'username';// User ID buffer UCHAR szPasswd[7] = 'passwd';// Password buffer UCHAR szModel[128];// Model buffer SDWORD cbModel;// Model buffer bytes recieved UCHAR szSqlStr[128]= 'SELECT test FROM testtable where test = 'test_success'; RETCODE retcode; // Allocate memory for ODBC Environment handle SQLAllocEnv (&hEnv); // Allocate memory for the connection handle SQLAllocConnect (hEnv, &hDBC); // Connect to the data source 'szDSN' using userid and password. retcode = SQLConnect (hDBC, szDSN, SQL_NTS, szUID, SQL_NTS, szPasswd, SQL_NTS); if (retcode SQL_SUCCESS retcode SQL_SUCCESS_WITH_INFO) { // Allocate memory for the statement handle retcode = SQLAllocStmt (hDBC, &hStmt); // Prepare the SQL statement by assigning it to the statement handle retcode = SQLPrepare (hStmt, szSqlStr, sizeof (szSqlStr)); // Execute the SQL statement handle retcode = SQLExecute (hStmt); // Project only column 1 which is the models SQLBindCol (hStmt, 1, SQL_C_CHAR, szModel, sizeof(szModel), &cbModel); // Get row of data from the result set defined above in the statement retcode = SQLFetch (hStmt); // Free the allocated statement handle SQLFreeStmt (hStmt, SQL_DROP); // Disconnect from datasource SQLDisconnect (hDBC); } std::cout << retcode << 'n'; // Free the allocated connection handle SQLFreeConnect (hDBC); // Free the allocated ODBC environment handle SQLFreeEnv (hEnv); system('PAUSE'); return EXIT_SUCCESS; }
Jun 05, 2012 Linker errorundefined reference to 'ibdev@24' Linker errorundefined reference to 'ibwrt@12' Linker errorundefined reference to 'ibrd@12' Linker errorundefined reference to 'ibcntl' and a host of other undefined references to functions defined in the header file mentioned above. Dev c++ font spacing.
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Mar 31, 2012 hay I am using dev c and I am having these errors. Linker error undefined reference to `point::point(double, double)' Linker error undefined reference to `point::tostring const' Linker error undefined reference to `point::point(double, double)' Linker error undefined reference to `point::tostring. How do I generate a Windows popup in C? How to include multiple header file? C# Updating changes to sql database; Gradebook Project help c with two dimensional arrays; warning and errors after compiling; Passing a value; String cannot be of zero length. Visual c.net form opening problem. Help needed for how to store lstbox with 2 arrays. The information on Computing.Net is the opinions of its users. Such opinions may not be accurate and they are to be used at your own risk. Computing.Net cannot verify the validity of the statements made on this site. Dev C linker errors, undefined reference. Like if I used Linked list i added both linkedlist.cpp and linkedlist.h to the project. Still the linker reports. Educated guess, how is 'DLLExport' defined? If it is a macro, did you define the right macro to get it defined correctly? Related question. Is the library providing the missing linking function static or shared (DLL)?
Dev C Project Undefined Reference Pdf
C++ Link Error Undefined Reference
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I have designed a package with several files, which is listed bellow base.cpp & base.hpp - define the template class base tree.cpp & tree.hpp - define the class tree derived from base<int> client.cpp & client.hpp - define the class client derived from tree main.cpp - the main function instantiate client and run All these files are compiled successfully, but there's a linker error ' [Linker error] undefined reference to `base<int>::base_run()' '. However, I have defined this function in base.cpp, and all .cpp files are added to the project. I use IDE Dev-C++ 4.9.9.2. I don't know why the linker cannot find this function. When I get ride of the template, then problem solved. But I really need the class 'base' to be a template class. When I use the template but melt all these files into one file, problem also solved. But I don't like that. I have made the program to be very small (doing nothing, only shows the problems) and attached it with this note in the file problem_example.zip. Can anybody tell me why this happen? what's wrong with template class? thanks a lot
