473,835 Members | 1,778 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

conflicting declaration for iostream, namespace conflict?

Hi,

I am compiling a collection of C++ code. Most of them are using the new
format #include <iostream>. I think all of them because I failed at
finding out which header file uses the old format #include
<iostream.h>. However, I met the following error messages.

"/usr/vacpp/include/iostream.h", line 74.7: 1540-0400 (S) "class
ostream" has a conflicting declaration
"../include/myfile.h", line 7.1: 1540-0424 (I) "ostream" is declared on
line 7 of "../include/myfile.h".

in "myfile.h", it declares
#include <iostream>
using std::streambuf;
using std::ostream;

The platform I am working on is IBM SP2 using xlC_r (VisualAge C++
Professional / C for AIX Compiler, Version 6).
Did you ever have similar problems? Thanks a lot.

Alex

Jul 22 '05 #1
2 3995
<hu******@gmail .com> wrote...
I am compiling a collection of C++ code. Most of them are using the new
format #include <iostream>. I think all of them because I failed at
finding out which header file uses the old format #include
<iostream.h>. However, I met the following error messages.

"/usr/vacpp/include/iostream.h", line 74.7: 1540-0400 (S) "class
ostream" has a conflicting declaration
"../include/myfile.h", line 7.1: 1540-0424 (I) "ostream" is declared on
line 7 of "../include/myfile.h".

in "myfile.h", it declares
#include <iostream>
using std::streambuf;
using std::ostream;

The platform I am working on is IBM SP2 using xlC_r (VisualAge C++
Professional / C for AIX Compiler, Version 6).
Did you ever have similar problems? Thanks a lot.


Yes, I actually have seen something of the sort. It turned out that
in the old code I had to maintain, both <iostream> and <iostream.h>
were used without care. I had to weed out all uses of the old non-
standard header (<iostream.h>) and the problem had gone away.

Search through all source files and headers and remove non-standard
"library" headers like <iostream.h>. Standard C++ headers do not
have the '.h' in their names.

Victor
Jul 22 '05 #2
Thank you very much Victor. I finally found that I missed a small
header file in a subdirecotry that includes "iostream.h ". The
conflicting problem is solved. What a good day :).

Enjoy your holiday.

Alex
Victor Bazarov wrote:
<hu******@gmail .com> wrote...
I am compiling a collection of C++ code. Most of them are using the new format #include <iostream>. I think all of them because I failed at
finding out which header file uses the old format #include
<iostream.h>. However, I met the following error messages.

"/usr/vacpp/include/iostream.h", line 74.7: 1540-0400 (S) "class
ostream" has a conflicting declaration
"../include/myfile.h", line 7.1: 1540-0424 (I) "ostream" is declared on line 7 of "../include/myfile.h".

in "myfile.h", it declares
#include <iostream>
using std::streambuf;
using std::ostream;

The platform I am working on is IBM SP2 using xlC_r (VisualAge C++
Professional / C for AIX Compiler, Version 6).
Did you ever have similar problems? Thanks a lot.


Yes, I actually have seen something of the sort. It turned out that
in the old code I had to maintain, both <iostream> and <iostream.h>
were used without care. I had to weed out all uses of the old non-
standard header (<iostream.h>) and the problem had gone away.

Search through all source files and headers and remove non-standard
"library" headers like <iostream.h>. Standard C++ headers do not
have the '.h' in their names.

Victor


Jul 22 '05 #3

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

Similar topics

2
2222
by: John Ky | last post by:
Hello: Building Python works fine. Now I am trying to build my own python module on Solaris 9, but I'm getting the following conflict: In file included from /wrk/src/test/tools/local/include/python2.2/Python.h:62, from elxml.cpp:20: /wrk/src/test/tools/local/include/python2.2/pyport.h:333: declaration of C function `int gethostname(char*, int)' conflicts with
2
6408
by: Jacek Dziedzic | last post by:
Is it valid to use a "using namespace foo" (as opposed to using foo::bar which I'm sure is legal) within a class declaration? My compiler rejects it, but I've been told it's valid. Can anyone please confirm or deny? TIA, - J.
9
2376
by: ai | last post by:
Hi , I have an application which has to read files of size few mba nd read them into array . Since i am using STL and std namespace to avoid the error error C2872: 'ifstream' : ambiguous symbol when i include <iostream.h> with std namespace and <List>
6
8120
by: user | last post by:
Hi, I got this error and donno know how to fix it: In file included from ../except.h:53, from group.c:22: .../portspecs.h:81: error: conflicting types for `const double __infinity' /usr/include/math.h:26: error: previous declaration as `const __dmath __infinity'
2
4527
by: Plok Plokowitsch | last post by:
After over a decade of programming in C++ I seem to have missed some substantial point (mental note: am I getting too old for this?). A little bit of help would be *very* appreciated. I'm trying to gather various different classes into a common namespace using typedefs: class QWidget {}; class MyListview {}; namespace gui
4
35031
by: Juhan Voolaid | last post by:
Hi I need help here. When i compile my program, i get this error: $ make g++ -c -Wall inf2_functions.cpp -o inf2_functions.o inf2_classes.h:6: error: ISO C++ forbids declaration of ‘vector’ with no type inf2_classes.h:6: error: expected ‘;’ before ‘<’ token make: *** Error 1
8
9329
by: Lathe_Biosas | last post by:
Hi While compiling my application that needs "windows.h" there are some typedef redefinition errors redefinition at winnt.h( line 207) typedef void *HANDLE redefinition at windef.h( line 143) typedef unsigned char BYTE redefinition at windef.h( line 141) typedef unsigned long DWORD #define INVALID_HANDLE_VALUE -1 redefinition at winbase.h(55) #define
11
3926
by: alex sparsky | last post by:
I have a rather unique problem that I need some advice on. I have multiple c# controls that need to make use of a common namespace. So when I go to include both controls that make use of that common namespace and one control has a newer version of that namespace, the compiler complains about ambiguous references. I've tried using compiler directives to manipulate the namespaces to be different at compile time but vs.net 2005 keeps...
2
2199
by: Layton | last post by:
Hi, CPP gurus, How to use friend function cross the namespace? I have the following sample code with operator << overloaded, it's working. The problem the operator << function can't access private class (myPoint) member x and y directly and I have to use getters to make it work. If there is no namespace, direct access myPoint::x and y is ok. I tested successfully by add friend declaration inside class myPoint. (turn on line CCC, BBB,...
0
9803
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
10808
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10520
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10560
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10233
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9344
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
7766
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 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 a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5636
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
2
3993
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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.