mysql++1.7.1 vc++6 compile errors

[Keith Lee]

Hi

I am using visual studio C++ 6, with SDK, my mysql database is 4.1.18, i 
downloaded mysql++ 1.7.1 as this is the compatiable version for vc++6. 

the example program compiles and runs. when i go to make my own project i use 
the wizard and create a basic dialog MFC app. at the top of the main cpp file i 
add #include mysql++ and then in the program call Connection 
con(login,localhost,root,abc);

in the mysql++ download there is many lib and include folders, i have copyied 
the contents of these in the the vc++6 include and lib folders. 

when come to compile i get many errors as seen below. please help

c:\program files\microsoft visual studio\vc98\include\type_info1.hh(39) : 
warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance 
warning)
c:\program files\microsoft visual studio\vc98\include\type_info1.hh(159) : 
warning C4800: 'unsigned int' : forcing value to bool 'true' or 'false' 
(performance warning)
c:\program files\microsoft visual studio\vc98\include\type_info1.hh(172) : 
warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance 
warning)
c:\program files\microsoft visual studio\vc98\include\type_info1.hh(176) : 
warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance 
warning)
c:\program files\microsoft visual studio\vc98\include\type_info1.hh(180) : 
warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance 
warning)
c:\program files\microsoft visual studio\vc98\include\type_info1.hh(184) : 
warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance 
warning)
c:\program files\microsoft visual studio\vc98\include\convert1.hh(40) : warning 
C4273: 'strtol' : inconsistent dll linkage.  dllexport assumed.
c:\program files\microsoft visual studio\vc98\include\convert1.hh(41) : warning 
C4273: 'strtoul' : inconsistent dll linkage.  dllexport assumed.
c:\program files\microsoft visual studio\vc98\include\sql_query1.hh(37) : 
warning C4800: 'class SQLQuery *' : forcing value to bool 'true' or 'false' 
(performance warning)
c:\program files\microsoft visual studio\vc98\include\sql_query1.hh(135) : 
warning C4355: 'this' : used in base member initializer list
c:\program files\microsoft visual studio\vc98\include\compare1.hh(48) : warning 
C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning)
c:\program files\microsoft visual studio\vc98\include\result1.hh(33) : warning 
C4355: 'this' : used in base member initializer list
c:\program files\microsoft visual studio\vc98\include\result1.hh(42) : warning 
C4800: 'char' : forcing value to bool 'true' or 'false' (performance warning)
c:\program files\microsoft visual studio\vc98\include\utility(25) : warning 
C4786: 
'std::_Treestd::basic_stringchar,std::char_traitschar,std::allocatorchar 
,std::pairstd::basic_stringchar,std::char_traitschar,std::allocatorchar 
 const 
,int,std::mapstd::basic_stringchar,std::char_traitschar,std::allocatorchar
 
,int,std::lessstd::basic_stringchar,std::char_traitschar,std::allocatorchar
  ,std::allocatorint 
::_Kfn,std::lessstd::basic_stringchar,std::char_traitsch
ar,std::allocatorchar  ,std::allocatorint ::iterator' : identifier was 
truncated to '255' characters in the debug information
c:\program files\microsoft visual studio\vc98\include\map(93) : see 
reference to class template instantiation 
'std::pairstd::_Treestd::basic_stringchar,std::char_traitschar,std::allocatorchar
 ,std::pairstd::basic_stringchar,std::ch
ar_traitschar,std::allocatorchar  const 
,int,std::mapstd::basic_stringchar,std::char_traitschar,std::allocatorchar
 
,int,std::lessstd::basic_stringchar,std::char_traitschar,std::allocatorchar
  ,std::allocatorint ::_Kfn,std::le
ssstd::basic_stringchar,std::char_traitschar,std::allocatorchar  
,std::allocatorint ::iterator,bool' being compiled
c:\program files\microsoft visual studio\vc98\include\map(93) : while 
compiling class-template member function 'int __thiscall 
std::mapstd::basic_stringchar,std::char_traitschar,std::allocatorchar 
,int,std::lessstd::basic_stringcha
r,std::char_traitschar,std::allocatorchar  ,std::allocatorint 
::operator [](const 
std::basic_stringchar,std::char_traitschar,std::allocatorchar  )'
Generating Code...
Linking...
mysqlDlg.obj : error LNK2001: unresolved external symbol public: __thiscall 
MysqlConnection::~MysqlConnection(void) (??1MysqlConnection@@[EMAIL PROTECTED])
mysqlDlg.obj : error LNK2001: unresolved external symbol public: __thiscall 
MysqlConnection::MysqlConnection(char const *,char const *,char const *,char 
const *,bool) (??0MysqlConnection@@[EMAIL PROTECTED]@Z)
Debug/mysql.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

mysql.exe - 3 error(s), 14 warning(s)




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RE: mysql++1.7.1 vc++6 compile errors

[Jason Teagle]

 the example program compiles and runs. when i go to make my own
 project i use the wizard and create a basic dialog MFC app. at
 the top of the main cpp file i add #include mysql++ and then in
 the program call Connection con(login,localhost,root,abc);

 in the mysql++ download there is many lib and include folders, i
 have copyied the contents of these in the the vc++6 include and
 lib folders.

 when come to compile i get many errors as seen below. please help

...snip...

 Generating Code...
 Linking...
 mysqlDlg.obj : error LNK2001: unresolved external symbol public:
 __thiscall MysqlConnection::~MysqlConnection(void)
 (??1MysqlConnection@@[EMAIL PROTECTED])
 mysqlDlg.obj : error LNK2001: unresolved external symbol public:
 __thiscall MysqlConnection::MysqlConnection(char const *,char
 const *,char const *,char const *,bool)
 (??0MysqlConnection@@[EMAIL PROTECTED]@Z)
 Debug/mysql.exe : fatal error LNK1120: 2 unresolved externals
 Error executing link.exe.

 mysql.exe - 3 error(s), 14 warning(s)

Have you included mysql++.lib in your list of libraries to link to within
your project?

(Project - Settings - 'All Configurations' from 'Settings for:' combo, Link
tab, 'Input' from 'Category' combo)

--
Jason Teagle
[EMAIL PROTECTED]


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mysql++1.7.1 vc++6 compile errors

[Keith Lee]

thanks for the reply Jason, i have now added mysql++.lib to the linker and also 
copyied the libmysql.dll to the system folder. the program complies now with a 
few performance warnings but no errors.

there is one link error
LINK : warning LNK4098: defaultlib LIBC conflicts with use of other libs; use 
/NODEFAULTLIB:library
In the settings if i do as it says above, i get over 200 errors!! so i revert 
back.


i have the simple code below but when the program is ran, the first message box 
comes up and then the program crashes

MessageBox(test1);
Connection con(login, localhost, root, abc);
MessageBox(test2);

the crash error is abnormal program termination

if i use the example console code that comes with mysql++ 1.7.1 i get the 
following error at run time.
Error: Client does not support authentication protocol requested by server; 
consider upgrading MySQL client

as i already said, i am running mysql++1.7.1 and mysql 4.1.18 and vc++6

please help











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Re: mysql++1.7.1 vc++6 compile errors

[Warren Young]

Keith Lee wrote:


there is one link error
LINK : warning LNK4098: defaultlib LIBC conflicts with use of other libs; use 
/NODEFAULTLIB:library
In the settings if i do as it says above, i get over 200 errors!! so i revert 
back.


Visual C++ is very picky about the way programs are built when linked 
against third-party libraries.  Those libraries have to be built using 
the exact same build settings: whether to use multithreading or not, 
whether to use the dynamic C runtime library or the static one, whether 
to use Unicode or not, etc...  If you get one of these wrong, you can 
get all kinds of havoc.


Study the project settings for MySQL++ and either change them to match 
your program's build settings, or vice versa.



the crash error is abnormal program termination


Wrap the Connection object creation in a try block.  MySQL++ may be 
throwing an exception.  An uncaught exception kills the program.


P.S. You do realize that you can get the entry level version of Visual 
Studio 2005 for free right now, don't you?  Then you will be able to use 
the current version of MySQL++, so we can offer you better support. 
We're not picking on Visual C++ here.  We don't support eight year old 
versions of GCC, either.

--
Warren Young
Maintainer of MySQL++

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