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Header correct, but identifier not found

Answer 1

A:

If wxWidgets is C++, and it includes and and your compiler prevents inclusion of and when cstring/cstdio are included, then strlen would be in the std namespace instead of global. Try std::strlen and see if that fixes the error.

Mark B 2010-03-26 21:05:07

Unfortunately, that does not work. Message: std is not a class or namespace. The headers of the wxcrtbase.h file are: "#include "wx/chartype.h" #include <stdio.h> #include <string.h> #include <ctype.h> #include <wctype.h> #include <time.h> #include <io.h>"

sciloop 2010-03-26 21:13:45

#include of system headers (<>) should almost always come before #include of local headers ("")

Ben Voigt 2010-03-26 21:56:32

Putting the system headers in front did not change the error messages.

sciloop 2010-03-26 22:14:48

Answer 2

A:

Try #include<cstdio> and #include<cstring>, which are the headers for C++

gc 2010-03-26 21:06:10

Also this does not work. The same messages appear...too bad.

sciloop 2010-03-26 21:16:32

Answer 3

+1 A:

A few things to try and/or answer:

Can you post at least the few lines around and including the one that the compiler generates the 'identifier not found' error?
When you say you have an #include <string.h> line, exactly which file(s) and does it precede the various wx includes?
Can you post the output of the included headers when you build with the /showIncludes option (it's in the VS 2008 IDE's C++ project property page under "C/C++/Advanced/Show Includes")?

Edit, with new information:

Based on the edit you made that included a more complete listing from /showIncludes, it appears that you might have the INCLUDE path set incorrectly. Here are a couple of lines from the log:

1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\cstring
1>Note: including file: M:\Visual Studio 2008\Projects\general\wxWidgets-2.9.0\include\wx\string.h

When MSVC's cstring header is trying to include string.h, it's picking up a string.h header from the wx library instead of the one that's part of the compiler distribution (which would be in C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\string.h).

I'm not sure why the wx library would name one of their own headers string.h (instead of, say, wxString.h), but I assume that it's intended to be picked up by someone using something like:

#include "wx/string.h"

Regardless, I think you'll fix your problem by making sure that the MSVC include directory is in the INCLUDE search path before any other directory.

Michael Burr 2010-03-26 21:37:05

1.#ifdef __cplusplusinline size_t wxStrlen(const char *s) { return s ? wxCRT_StrlenA(s) : 0; }inline size_t wxStrlen(const wchar_t *s) { return s ? wcslen(s) : 0; }2. the string.h is only in the wxWidgets files. There the original order is:#include <stdio.h>#include <string.h>#include <ctype.h>#include <wctype.h>#include <time.h>#include <io.h>3. I did what you suggested. The output is very long.I have to do a new post for that.

sciloop 2010-03-26 22:02:27

Michael, thanks very much for the great help. With the MSVC directory in the first place it works now!

sciloop 2010-03-29 18:36:37

Answer 4

A:

The comment field is too small. I answer to Michael Burr:

A.

#ifdef __cplusplus
inline size_t wxStrlen(const char *s) { return s ? wxCRT_StrlenA(s) : 0; }
inline size_t wxStrlen(const wchar_t *s) { return s ? wcslen(s) : 0; }`

B. the string.h is only in the wxWidgets files.

There the original order is:

#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <wctype.h>
#include <time.h>
#include <io.h>

C. Here`s the some lines before and a line after the first error message:

1>Note: including file: M:\Visual Studio 2008\Projects\general\wxWidgets-2.9.0\include\wx/chartype.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\ctype.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\crtdefs.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\wctype.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\crtdefs.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\time.h
1>Note: including file:  C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\crtdefs.h
1>Note: including file:  C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\time.inl
1>Note: including file:  C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\io.h
1>Note: including file: C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\crtdefs.h
1>M:\Visual Studio 2008\Projects\general\wxWidgets-2.9.0\include\wx/wxcrtbase.h(696) : error C3861: 'strlen': identifier not found
1>M:\Visual Studio 2008\Projects\general\wxWidgets-2.9.0\include\wx/wxcrtbase.h(709) : error C3861: '_strdup': identifier not found

sciloop 2010-03-26 22:07:10

I think you should edit your question to include this information instead of having it in a answer to make it easier on people who might want to help answer the question. Also, I think you may need to include all the lines from the `/showIncludes` output for one .c/.cpp file - at least up to the error C3861 lines. What you've shown doesn't indicate that `string.h` was included, but that's probably because it was before wherever you decided to start the copy/paste.

Michael Burr 2010-03-26 22:32:49

ok, I`ll do so.

sciloop 2010-03-26 22:43:34

@sciloop: I've modified my answer based on the infomration you added to your question.

Michael Burr 2010-03-27 09:20:22

Answer 5

A:

Try:

#include <cstdio>
#include <cstring>
#include <cctype>
#include <cwctype>
#include <ctime>
#include <cio>

using namespace std;

#include "wxcrtbase.h"
#include "wx/chartype.h"

int main(void) {
    return strlen("hey there good buddy!");
}

This is the stuff that I hate about c++ the most.

nategoose 2010-03-26 22:07:55

Are you sure "<cio>" exists? I get errors and I cannot find it on the internet( google )?

sciloop 2010-03-26 22:24:43

When I compile YOUR code with cio replaced with io.h, I get the same error messages again

sciloop 2010-03-26 23:39:40

But, at least its good to see that the problem exists even without my own project B. So, it must be a problem inside wxWidgets?!

sciloop 2010-03-27 06:57:40

All I was trying to demonstrate was a different ordering of the includes and namespace usage. <cio> should mean "namespace std { #include <io.h> }".

nategoose 2010-03-28 23:07:04

Answer 6

A:

I indeed think that you have to include cstdio and cstring (as proposed above), but in this case everything will reside in namespace std, like std::strlen and such...

Randall Flagg 2010-03-26 22:14:40

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Header correct, but identifier not found

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