473,382 Members | 1,583 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,382 software developers and data experts.

std::map<std::string, std::string> produces complie errors Managed C++ Class Library

Hello,

I having having oodles of trouble using the std lib in my MC++ (VS.NET
2003) Class library. I figured out a simple sample to reproduce the
errors I am having. Create a MC++ (VS.NET 2003) class library and type
in the following code below:

#include <map>
#include<string>

using std::string;
using std::map;

using namespace System;
using namespace std;

namespace ManagedLib
{
public __gc class Class1
{
public:
Class1(){};
~Class1(){};

void DoNativeHashMap()
{
std::map<std::string,std::string> x;
return;
}
};
};

when I go to complie this I get the following errors:

Linking...
LINK : error LNK2020: unresolved token (0A000008) ??_7type_info@@6B@
LINK : error LNK2020: unresolved token (0A000009) _CxxThrowException
LINK : error LNK2020: unresolved token (0A00000A) exception.__ctor
LINK : error LNK2020: unresolved token (0A00000C) exception.__dtor
LINK : error LNK2020: unresolved token (0A00000E) delete
LINK : fatal error LNK1120: 5 unresolved externals

Ok so I figured this must have something to do with std::map because
when I just have std::string everything is beautiful.

So I add a reference to msvcrtd.lib (for debug config) and msvcrt.lib
(for release config) thinking that would do the trick then the errors
go awy but I then get this warning (not error):

ibcpmtd.lib(xlock.obj) : warning LNK4210: .CRT section exists; there
may be unhandled static initializers or terminators

I looked on the msdn site and found something about Converting Managed
Extensions for C++ Projects from Pure Intermediate Language to Mixed
Mode ->

http://msdn.microsoft.com/library/de...oMixedMode.asp

I just can't imagine this is what one would have to do to use teh
std::map or std::set in a MC++ class library...

Can someonw confirm this...Please say it aint so :(

Help help would definitely be appretiated..

Regards

Max

Nov 23 '05 #1
1 3679
Ok, So I did some additonal playing around after lookiing through that
MS article like 34 times while pulling my hair out :). I think i might
have answered my own question, but can anyone confirm this behavor?
Again I I am trying to do is us objects in the standard template lib no
fancy win32 API calls or AFX stuff, etc. Just stuff like std::list,
std::string, std::map, std::vector, etc. Everything complied and
"seems" to be running fine. I guess the only thing I did not do is add
the entry points song and dance and call some kind of ::intialize and
::terminate method as they described in the MS article.

I am a little worried (even though everything is working right now)
that because I didnt initialize the whatever static library variables
that CRT might require via ::intialize and ::terminate that I might run
into problems but figured since I am only trying to use the basic
std::string, std::map, etc type stuff that it shouldn't be a problem?

Anyway Here is what I did:

Went to the project properties pages ->Linker->Input:
1. Added __DllMainCRTStartup@12 to Force Symbol References
2. Added msvcrt.lib and msvcrtd.lib to Release and Debug configurations
respectively
3. Removed the nochkclr.obj
4. Add /noentry to the Additional Options field of the Command Line
page

Can Anyone confirm this or have they tried to access std::map in
managed c++ in vs.net2003?

Nov 26 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

1
by: gipsy boy | last post by:
// -- using namespace std; map<string,string> formMap; list<string> formParams; for(list<string>::iterator fit = formParams.begin(); fit!=formParams.end(); fit++) { cout << "key=" << *fit;...
5
by: Peter Jansson | last post by:
Hello, I have the following code: std::map<int,std::set<std::string> > k; k="1234567890"; k="2345678901"; //... std::set<std::string> myMethod(std::map<int,std::set<std::string> > k)...
13
by: jstanforth | last post by:
This is probably a very obvious question, but I'm not clear on what operators need to be implemented for std::map.find() to work. For example, I have a class MyString that wraps std::string, and...
19
by: Erik Wikström | last post by:
First of all, forgive me if this is the wrong place to ask this question, if it's a stupid question (it's my second week with C++), or if this is answered some place else (I've searched but not...
4
by: lada77 | last post by:
All, Just wondering if one of you very helpful guru's out there could comment on some odd behaviour I am seeing. I'm betting it is something obvious but I am not experienced enough to tell...
2
by: brzozo2 | last post by:
Hello, this program might look abit long, but it's pretty simple and easy to follow. What it does is read from a file, outputs the contents to screen, and then writes them to a different file. It...
2
by: jabbah | last post by:
I have some data in a map and I want to sort it. Currently I have implemented it like this: #include <iostream> #include <map> #include <string> using namespace std; int main(){
0
by: Faith0G | last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 3 Apr 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome former...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.