Programming :: C++Linking Classes/.cpp Files To Run One After Other?
Apr 11, 2010
This is probably a really stupid thing to ask considering the development I'm doing (effectivly creating a virus scanner), but how do I link classes/cpp files?I have 3 applications/sections that I can compile/combine with a makefile, that's fine, but I need them to run 1, 2, 3 once the output from the makefile is done.Currently the only section to actually run is whichever I have "main" in and obviously if I put that into all three, they won't compile as one.I've been looking all over the place at all sorts, header files and such, but there is no mention of how toually do this although I'm sure it must be possible. I'm used to being able to do this in Java and I'm sure I've seen C++ applications do it, but not worked out how.I have 3x .cpp files which are combined into one using a makefile:
Code:
# Virus Scanner
scanner.out : ProgramList.o MD5Hash.o HazardCheck.o
[code]...
View 2 Replies
ADVERTISEMENT
Mar 13, 2011
compiling and linking using gcc: What does a file name with a suffix '.a' represent? If I have multiple .c and .h files, how can I link them together? How can I create the .a file?
View 6 Replies
View Related
Apr 18, 2010
I have written an OpenGL based program which uses i.a. libjpeg that I want to link statically so I can send it to someone who doesn't have all the libraries needed installed to allow for a dynamically linked executable to run. As such I tried with giving the [b]-static[b] parameter to gcc.
Code:
x86_1$ make
gcc -O3 -c jpegloader.c
gcc --std=c99 -O3 -c --std=c99 -I/usr/include -L/usr/X11R6/lib main.c
[code].....
Why would gcc claim that I'm missing GLUT? This works perfectly fine when I do dynamic linking -- i.e. omitting the -static argument.
View 13 Replies
View Related
Feb 17, 2010
I am using Centos 5.4 with gcc v4.1.2. If I take a bunch of .o files and I then link with my main.o to form an executable then this links and executes just fine. If however, I try to create an archive file (.a) using 'ar rus xxx.o yyy.o etc' and then try to link the resulting .a with my main.o then I get 'undefined symbol' linker errors and I don't understand why.
View 2 Replies
View Related
Dec 17, 2009
I have 3 c++ files, classdef.h (header file with class definition), methods.cpp (class methods) and program.cpp - the program itself. Both .cpp files have
Code:
#include "classdef.h"
in files. How I can link the files together and compile them in one executable program? I am using Geany IDE for coding.
View 4 Replies
View Related
Mar 9, 2009
I have created a simple test class - Mortgage, with the class declaration in the .h file and the class's methods defined in the .cpp file. (mortgage.h && mortgage.cpp, respectively) Straight up C++ 101 as far as I can tell. I instantiate the class in the main() function, which is defined in practice.cpp. Using Geany on Ubuntu, both the practice.o and mortgage.o files are created, but then I get a linker error: undefined reference to class::functionName
I get it for each function. If the mortgage.cpp file is foremost in the editor when I click "build", then I get the undefined reference to main() error, if practice.cpp is foremost (where the main() function is) then I get undefined reference to Mortgage::Mortgage(), and all the rest of the functions defined for that class. How do I get the linker to know where my object files are so it will link them in? Or is the problem somewhere else entirely?
View 8 Replies
View Related
Oct 28, 2010
I know the basic answer about how to create a class as ABC.But I don;'t know- - why I have to create a AbstractBaseClass. - In what situations it can be used.an example code base and not like a animal(base) and tiger(derived) relationship example.
View 2 Replies
View Related
Feb 15, 2010
Is it possible to have a templated c++ stl container in another class without specifying the type prior to compile time? I haven't coded in c++ in a while and im at a total loss.
For example - Not real code. Just outlining the problem code...
View 1 Replies
View Related
Feb 4, 2010
facing a problem in declaring variables. i have a few classes like the one below...
Code:
#ifndef _FINANCE_H
#define_FINANCE_H
[code]....
View 1 Replies
View Related
Jan 6, 2011
I am fairly new to c++. There must be a better way to do the following?:- Say I have a base class, Pet. I have several child classes that extend from this, like Dog, Cat, Fish etc.
I have the following function, that returns a pointer to a new Pet:-
Code: Pet* addPetToVet()
{ //Do some stuff
return new Pet();
} This will return a pointer an instance of a pet object.
Now, if I want to interpret this pet as a dog or cat I have to do this:-
Code: Dog* dogA = static_cast<Dog*>(addPetToVet());
Cat* catA = static_cast<Cat*>(addPetToVet()); Is there a way around this? Casting seems lame. I cant write a function for each type of pet.
View 5 Replies
View Related
May 15, 2010
I'm new to Java.
I'm trying to use some dynamically loaded classes in my application.
The application doesn't know those classes , Just it try to load a class by name that its name came from input.
It doesn't know class (So I can't use casting) but just needs to call some methods of that class (every class should have that methods).
I thought about interfaces but I don't know how.
How can I call those methods?
View 1 Replies
View Related
Apr 18, 2011
Why are the 'defense' method calls actually using the 'offense' methods.Also, is there a way to remove the commented base classes for 'Player' so that the casting isn't necessary?
Code:
#include <iostream>
class Offense
[code]...
View 1 Replies
View Related
May 12, 2010
I've got a set of objects (all of the same type). I'm trying to think of a good way to divide it into equivalence classes, with equivalence of two objects defined as meaning a specified set of attributes are equal for both objects. More concretely, I've got:
- a Java class with around 50 fields
- a bunch of instances of the class
I want:
- to divide the instances into a few sets
- in each set, each instance has field 1 - field 5 equal to fields 1-5 of the other instances in the set.
The method I've come up with is to generate a hashcode for each instance based on the hashcodes of fields 1-5*, and map the hashcode to one of my sets. Ignoring problems with potential hashcode collisions (which I'm expecting to be too rare to worry about for now), does that sound reasonable? It seems simple enough, but I'm wondering if there's a simpler method I haven't thought of.
* I'll generate the hashcode using a method based on Eclipse's generic hashcode method, which looks like this:
Code:
public int hashCode() {
final int prime = 31;
int result = 1;
[code]....
View 5 Replies
View Related
Apr 29, 2010
I have a C code and assembly (nasm) code and I am not able to find how to link them each other. Here are the codes :
NASM side:
Code:
global_maxofthree
section .text
_maxofthree:
[code]....
I am using ubuntu 9.10 and my NASM version 2.05.01 compiled on Nov 5 2008.
View 4 Replies
View Related
Jun 10, 2010
There's a problem with static linking (and no problems with dynamic linking).
Here's my code:
Quote:
And makefile rule:
Quote:
That's dynamic linking. And it works perfectly. If i use static linking
Quote:
There is an undefined reference error:
Quote:
As nm shows there's a symbol named BuzzerInit in static library.
View 2 Replies
View Related
Dec 11, 2010
I am trying to build an application that must link with python so as to load a python module during runtime.I have this makefile :
Code:
[alex@iskandhar src]$ cat Makefile
CFLAGS = -Wall -O3 -I ../../../SPOOLES.2.2 -DARCH="Linux" -DSPOOLES -DARPACK
[code]....
View 4 Replies
View Related
Oct 5, 2010
I have a really simple program trying to use XInput2.h, which fails on linking
Code:
#include <X11/extensions/XInput2.h>
int main(){
Display *XSession = XOpenDisplay(NULL);
int OriginScreen = 0;
int pID = 7;
[Code]....
I'm at a loss about what to do. Replacing XIWarpPointer by XWarpPointer and removing the pID argument solves it, but is not an option (no input ID).
View 5 Replies
View Related
May 27, 2010
I am trying to add some function to the c++ project (calling function) and the called function are in C. And i am getting error "undefined reference to "Hello(int,int)" " while linking. It is compiling correctly. It is linking to header file mention in the calling function. This header file has definition to the c - called function. Do you thinking having c files into C++ project will be a problem? Should I remove <stdio.h> in c files?
View 2 Replies
View Related
Oct 28, 2010
I have a question about shared objects and when mapping and linking is established in the following code...Well more of a verification.
getsetx.c - shared object source code Code: unsigned long x = 0;
unsigned long getx(void)
{
return x;
}
[Code].....
Now its my understanding when I execute ./testit, getsetx.so will get mapped into its address space at start up and testit will link any functions as they are needed..
View 3 Replies
View Related
Jan 9, 2011
I tried to link my executable program with 2 static libraries using g++. The 2 static libraries have the same function name. I'm expecting a "multiple definition" linking error from the linker, but I did not received.
Code:
//staticLibA.h
#ifndef _STATIC_LIBA_HEADER
#define _STATIC_LIBA_HEADER
int hello(void);
[code]....
View 4 Replies
View Related
Jan 22, 2011
I have set up Eclipse + CDT on an Arch 2010.05 install. I set up an eclipse project and added SDL as a dependency (see below):
Project -> Properties
* -> GCC C++ Compiler -> Preprocessor -> main=SDL_main
* -> GCC C++ Linker -> Libraries -> SDLmain SDL (in that order top to bottom)
* -> GCC C++ Linker -> Libraries -> Library Search Path -> /usr/lib/ (I verified that libSDL.a and libSDLmain.a are there)
This is the code I'm compiling. It's designed to just be a hello world style SDL app to see that everything is working.
[Code]...
View 3 Replies
View Related
May 6, 2010
[root@shankar-lx src1]# make
gcc -c main.c
gcc -c database.c
gcc -c e_sqlite.c
gcc -o TEST main.o database.o e_sqlite.o /usr/local/lib/libsqlite3.so.0.8.6 -w -lpthread
[root@shankar-lx src1]# ./TEST
./TEST: error while loading shared libraries: /usr/lib/libsqlite3.so.0: ELF file OS ABI invalid
My application compiled well but when try to run, it is giving ELF file OS ABI invalid ERROR. What is this error.
Kernel version is 2.4-18
View 1 Replies
View Related
Feb 10, 2011
I would like to ask you something about open-source and linux. Is it possible to make a commercial application for linux and sell it compiling it with linking to open-source libraries without altering them and consequently without allowing download of the source code and without making the application itself free?
View 3 Replies
View Related
Mar 24, 2010
The issue I am currently facing is more of an annoyance / curiosity, and it may not even be a problem, but it sure feels like one. Background: I am becoming a computational chemist (grad school begins in the fall) and the code I run is all in fortran. I am currently compiling with gfortran. When I compile the code (on a box running ubuntu server), everything appears to compile fine, but the linking stage is taking five to ten minutes. I ran the time command while making it and got the following results.
Quote:
time make
gfortran -c -O3 -fomit-frame-pointer -finline-functions -ffast-math suijtab.f
Linking testCompile ...
done
[code]...
I just don't understand why it is taking 5 minutes of real time if it only takes 10 - 15 sec of system time?
View 4 Replies
View Related
Apr 13, 2011
I am creating two shared libs that i intend to be dynamically linkable in C and C++, cross platform Linux/Windows/Mac. As a basic sketch, true for both libs, the lib code is in several .c/.cpp and .h files. For now, I'll talk about the part that I am actively working on, a lib named Discover, i.e. libdiscover.so.1.0. First, everything is in a namespace, RemKon_Discover.
The main Discover.cpp defines the methods for the Discover class (declared in Discover.h) and has extern "C' routines that can return pointers to my main c++ object. The call to GetLibraryMainPointer() creates a Discover class object, theMainObject (ok, I win a prize for dumb names) and returns the (non-mangled) pointer to the caller over in my test program. The Discover class itself is declared extern "c" and the tester program #includes "Discover.h".
In the test program, dlopen() correctly opens the lib and dlsym() gets the pointer to theMainObject. However, when I use that pointer in the tester program to access a method (aDiscoverObject->hello(), e.g.) I get compile time errors saying that Discover::hello() in an undefined reference. My makefile is attached.
[Code]....
View 10 Replies
View Related
Feb 20, 2010
I've got a shared (Windows/multiuser Linux) laptop, and I've got installed World of Warcraft and some steam games in Windows. With steam games, there is (almost) no problems. I've installed steam in Linux, and soft linked the 'steamapps' directory (per-game compatibility is another issue). With WoW, the problem is different. I would like to have almost (but not) all files. Under World of Warcraft, every file and directory must be linked except the Interface directory and WTF/config.wtf file (so every user can play with their own settings and addons). How can I have a mix of linked and not linked files without linking every file? If I link manually every file/dir, when updating from Linux other users and Windows Wow is not updated; when updating from Windows, new files remains "unlinked".
View 3 Replies
View Related
Jun 14, 2010
In our LAN connection setup. having 192.168.1.0/24 and 192.168.2.0/24 how do i connected intermediately. server are RHEL5.
View 2 Replies
View Related
Apr 2, 2011
I started taking CIT 101 (computer classes 101 LOL i know) as I am strict linux, in my house, purchasing office 2007 yes they require 2007 not 2010. Columbus State is tough on that, I need to be able to send documents in 2007 .docx in openoffice 3.3. The only computer that uses windows, is my grandparents and I don't want to buy Office if at all possible. I have like no money after all the text books. Teacher is strict it can not be .doc, odt. or other, needs to be .docx
View 9 Replies
View Related
Oct 20, 2010
To foster from the failover concept of Cups I have set up 2 servers with the same printers and settings to enable the implicit classes.
Server A
I added first aprinter defined with the name myprinter (a Ricoh MP5000)
Server B
On Server B i did no printer definition
That is working fine on Cups web interface of Server B i see queuename Server A.myprinter(and vice versa).
Now I add the printer (without samba via ipp) to my windows client with the parameters [url]. I can print that way all ok. The job appears and will be printed on Server A
When I disable myprinter on A. I cannot print. I expected with the implicit classes that it switches to Server B. Is the idea wrong ? Or is Windows limited here ? Or is there another way of defintion I have to do.
My both servers are running on different platforms Suse SLES 10 and Red Hat. CUPS version 1.4.4
View 2 Replies
View Related
Mar 11, 2011
I'm trying to set up Apache Tomcat with virtual hosting. I've used Caucho Resin before but not Tomcat...and I've run into what appears to be (from Google at least) a rather common problem with Tomcat in that any properly packaged classes under WEB-INF of the default virtual host or the named host are not found and Tomcat complains of a class that "cannot be resolved to a type". I researched this error on Google and the consensus seems to be that: -
- You need properly packaged classes as classes in the default package are no longer allowed. I have done this.
- You need to either fully declare the packaged class to make an instance of it within the JSP or include the via an import statement at the top of the JSP. I have done this.
- In the web.xml for the Tomcat server instance (under $CATALINA_HOME/conf/web.xml) you need to set the servlet mapping for JSPs fork init-param to "true". I have done this also.
Yet the problem persists and I have found no solution. So I can only assume I'm missing something obvious and fundamental. My configuration is as follows: - I have two virtual hosts - one as the default virtual host and another as a named virtual host.
$CATALINA_HOME/webapps/localhost <--- Default host.
$CATALINA_HOME/webapps/www.easicasino.com <--- Named host. The logic being that the URL IP address of the server will hit the default webapp and the URL hostname with hit the named webapp. This appears to work with just JSPs.
My $CATALINA_HOME/conf/server.xml looks like this: -
Code:
<?xml version='1.0' encoding='utf-8'?>
<Server port="8005" shutdown="SHUTDOWN">
<Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" />
<Listener className="org.apache.catalina.core.JasperListener" />
[code]....
View 1 Replies
View Related
