C++ is a general-purpose programming language.

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4
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786 views

clang++ (version 3.3) lacks headers

This seems odd. Take a simple C++ program #include <cmath> #include <iostream> int main(void) { std::cout << "Square root of 9 is " << sqrt(9) << std::endl; } ...
2
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29 views

Two webcams of the same model are not working

I've been developing a dual webcam system for stereoscopic purposes, in a linux enviroment, using c++ with the opencv library The ideal setup would be with 2 webcams of the same model, but it didn't ...
2
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0answers
139 views

lock/unlock events for in C++ app which should not depend on screen savers

We have a product, which was developed for Windows. Because of customer request we are developing it for Linux also. So being a beginner to Linux, have migrated most of it (which I loved it). Now got ...
2
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0answers
120 views

Modifying default KawigiEdit C++ template in Ubuntu 12.10 LTS

I am trying to edit default c++ template of KawigiEdit plugin, but after I configure and save the modified template as default template, there is no effect. Has anyone modified KawigiEdit's default ...
2
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0answers
78 views

Publish a QML/C++ application as a click package

I've written an application which I would like to publish as click package. All the guides and prepared projects mention plain QML applications only. My application furthermore depends on a shared ...
2
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0answers
1k views

Problems installing gcc for cross compiling for ARM

I've been trying to install the gcc-arm-linux-fnueabi package, and I've done it a few times by a few different methods but I always seem to be missing the c++ folder in the includes directory. To ...
1
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0answers
33 views

gcc: fatal error: no input files

I just installed Ubuntu (14.04 LTS) for the first time and I went straight to programming. I installed MonoDevelop and tried to create my first C++ program on Ubuntu. However, when I tried to build ...
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23 views

Have Qt Creator execute gdb command after all libraries are loaded

I would like to setup Qt Creator debugger to ignore all boost files when stepping through my code. Just to test, I added the command: "skip file ...
1
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0answers
30 views

Could not able to compile with /opt/ELDK42/usr/bin/ppc-linux-g++

here is my test.cpp #include<iostream> using namespace std; int main() { cout<<"hello world"; return 0; } $ /opt/ELDK42/usr/bin/ppc-linux-g++ test.cpp ...
1
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0answers
59 views

Problem with installing Qt5.3

I am trying to install Qt5.3 into my Ubuntu 14.04(64 bit). While installation process was running suddenly it was showing some prompts and showed several error messages as following: Error during ...
1
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0answers
39 views

Ncurses problem

I try to make my first program which use ncurses. The problem is that screen got clean when it meet first time ch = getch(); # include "sys/ioctl.h" # include "ncurses.h" # include "unistd.h" ...
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369 views

Unable to compile C++ Code

Whenever I try to compile a C++ file with IOStream , I get this error.. I've tried reinstalling GCC G++ (both 4.6 and 4.9) AND cpp.. It hasnt helped (or maybe I didnt do it the right way). How do I ...
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81 views

c++ debug jump back netbeans and eclipse

All the latest netbean ide and eclipse ide for c++ open some project and then rebuild and debug, it will somehow jump back to somewhere when I press step over,like this (from 44 to 40): Can ...
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66 views

Developing 32 bit application and using it in 64 bit Ubuntu 14.04

I would like to develop 32 bit c++ applications on an Ubuntu 14.04, 64 bit machine and use it on both 32 bit and 64 bit machines. One of the main difficulties I face is that I use some library which ...
1
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0answers
196 views

Get keyboard input without requiring root and without x11

I'm trying to capture keyboard input in a C/C++ program without requiring root privileges and without the use of X11 XNextEvent(). I've tried to open the device directly, but for obvious security ...
1
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0answers
903 views

Cmake fails while configuring OpenCV

I'm trying to buid OpenCV and use it in Qt. I have installed all required packages for OpenCV and Qt, after that I tried too run cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX=/usr/local ...
1
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0answers
58 views

Qml HUD integration without MainView?

I'm working on an app with Qt Quick Components, I don't want to use any Ubuntu specific components because I want the desktop version of my app to be more portable than that (Qt 5.2 is enough of a ...
1
vote
0answers
66 views

'__FDELT' and '__FDMASK' not declared in this scope (posix_types.h not included)

I'm running Ubuntu 12.04 LTS, 64bit version. I'm getting the following error when compiling a C++ program: ../elements/userlevel/socket.cc:477: error: '__FDELT' was not declared in this scope ...
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93 views

How do I set the F77 environment variable to gfortran?

I'm new Ubuntu (and linux) user. In order to do my senior project, I have to install psrchive I use this command to install psrchive ./psrsoft/bin/psrsoft psrchive --no-cfitsio This is part of ...
1
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0answers
435 views

A right path to CPP SDK for using it in IntelliJ Idea's cpp-project

I can't find the right path to CPP SDK which is required by IntelliJ Idea, IDE I want to use for development a C++ project. Could someone show me the right place? screenshot here ...
1
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0answers
234 views

Program not running properly when run in terminal

I am running C++ programs using the Gnome terminal emulator in Ubuntu 10.04. The program has a number of steps and I get the program to print something to terminal after every one to tell me how far ...
1
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0answers
442 views

C Time.h functions erratic on Precise 12.04

I'm running Ubuntu 12.04 and using the gcc compiler to compile my C/C++ programs. I want to benchmark a function. AFAIK, there are two standard functions to calculate time on POSIX systems and both ...
0
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16 views

error: expected unqualified-id before ‘;’ token when build c++ project?

I get an error when building a c++ project that works under Visual Studio but fails in Eclipse Some sample code to be able to simulate: #include <utility> #include ...
0
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0answers
13 views

Prefix and Path for Cross GCC in Eclipse

I'm pretty new in ubuntu and have a problem with it. I wanna to write a c++ program in eclipse and compile it with cross gcc. At the first i Added "CDT" from "help-->install new software" Now when ...
0
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79 views

Trouble installing Boost 1.58

running 14.04 LTS. I've gone and actually deleted the Boost directory from my /usr/include directory. I'm still trying to figure out how exactly to install this and get it working with my application. ...
0
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0answers
27 views

Adding qt4 and qt5 to global path

I have downloaded a source code from github. It is using qt and in many files it has the following headers included: #include <QApplication> #include <QApplication> #include ...
0
votes
0answers
23 views

ssh hangs when executed from Code

i am trying to log the RSSI value of wlan0 interface for a remote system. I run the following command to do that. sshpass -p <pwd> ssh <username>@<IP> iwconfig wlan0. I am executing ...
0
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0answers
40 views

Undefined Reference during catkin_make

I'm having some problem with the catkin_make. The error is : /home/marcello/catkin_ws/src/aruco_marker_detector/lib/libaruco_marker_detector‌​.so: error: undefined reference to ...
0
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35 views

ZXing C++ on ubuntu

Would it be posisble to run C++ version of ZXing in ubuntu? We have a need for it but cant afford to install Java for security concerns. https://github.com/jverkoey/liteqr
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17 views

14.04 HP 15-R212NL allegro 5 audio crash

in my pc when i start an allegro program it crash with segmentation fault when i call the allegro function "al_reserve_function(1);". In other pc it doesn't happen then i have read the code of this ...
0
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0answers
46 views

Uncomplete install of POCO C++ libraries

I recently started to use POCO C++ libraries to create a simple mail client and I needed to use SecureSMTPClientSession class, but compiler reports Poco/Net/SecureSMTPClientSession.h: No such file ...
0
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174 views

Raspberry Pi C++11 std::thread: pure virtual method called

Ubuntu 14.04. I've installed gcc-arm-linux-gnueabihf, g++-arm-linux-gnueabihf (tried 4.8 and 4.9 from utopic). Code that uses std::thread: #include <iostream> #include <chrono> #include ...
0
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0answers
94 views

Connecting to Arduino via USB from C++

I am trying to send information to an Arduino from a C++ file, however I am receiving segmentation errors when I run the program. It compiles fine but when it is run the first line of the code doesn't ...
0
votes
0answers
60 views

Creating new frame in wxwidgets using codeblocks

Good day to all, I am a beginner in coding wxwidgets using codeblocks in Ubuntu. I have a main frame which contains a button which would create a new frame.My main frame is called TemplateFrame and ...
0
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0answers
145 views

Just installed mysql c++ connector, 'undefine reference to 'get_driver_instance'

This is frustrating I've followed everything from the official mysql connector c++ website. I downloaded the binaries for 64 bit, opened it with archiver. It extracted into a folder 'usr' and had an ...
0
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0answers
91 views

How to add libxml2 to a Makefile?

While compiling a C++ tool called BioC I encountered a problem with the libxml header. In my attempt to solve it I downloaded libxml2-2.9.2 and compiled it in '/usr/local/lib/'. Then I studied the ...
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0answers
99 views

Unable to init SDL: No available video device

i am trying to execute graphics program bt there is msg on terminal "Unable to init SDL: No available video device " when execute the c++ graphics program
0
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0answers
117 views

Boost Mutex try_lock Assertion failed on my machine

I want to use a Boost Mutex to protect a software component. In one method I use a boost::lock_guard and it works great. In another method I can't use the lock_guard because I need the non-blocking ...
0
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0answers
71 views

makefile: how to perform “ranlib” operation correctly

I downloaded a third party lib( Library link) which installs and compiles properly. It creates multiple object file (*.o), rather than creating executable, it's using gnu libtool to do some scripting. ...
0
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0answers
50 views

build error with ubuntu netbean

"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf make[1]: Entering directory '/home/syj/Desktop/A1Start' "/usr/bin/make" -f nbproject/Makefile-Debug.mk ...
0
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0answers
16 views

Mapping a music file to a discrete 2D domain/2-D array in Ubuntu

I wish to take music file as an input. The output should be a scalar field on a 2D domain or a Vector field on a 2D domain, which I can store as an array. We have seen mapping of music to a 2D domain ...
0
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0answers
70 views

file not found when trying to run code in codeblocks

When I go to run a program xterm comes up and it has sh: 1: [address of file]/bin/Debug/[file name]: not found. Before I ran the program it says "It seems that this project has not been built yet. ...
0
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0answers
114 views

Problem - gnuplot not showing the graph window

I try to draw graph using gnuplot. I read this guide.I aompile and run below code without error but gnuplot is not showing the graph. I compile with gcc -o plot plot.c -lplot -lXaw -lXmu -lXt -lXext ...
0
votes
0answers
730 views

Can't compile C++ in Code::Blocks

I have some trouble with compiling c++ code from **Code::Blocks* IDE on Ubuntu. When I save the code as a .cpp data and click on Run under Build it says: "Target uses an invalid compiler; run ...
0
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0answers
35 views

Building and hosting Ubuntu packages using C++11

The full question would be: Is Ubuntu ready to host C++ applications packages, compiled with C++11, and which use a large set of dependencies? Let's say that we have an official Ubuntu package (C++ ...
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0answers
79 views

Signal called on user logout

I would like to ask what is the signal that is called when the user logs out? I have a Qt gui app that has handler for SIGTERM and SIGHUP signals. The app also has its own close event handler, so user ...
0
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0answers
256 views

how to make gcc search for headers in all subdirectories?

I'm new to Linux so please excuse me for my noobish question. I've installed libraries (PCL) which save their headers under usr/include as it should be. However, the problem is that an example of the ...
0
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0answers
40 views

How do I implement multiple keymaps into a kernel?

my problem is as follows: I have a custom-made kernel that has no functionality in regards of changing the keyboard mapping. It is possible to compile a different keymap into it, but that's it. The ...
0
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0answers
53 views

libstdc++: man std::sort or man std::algorithm failed

I have downloaded libstdc++-api.20140403.man.tar.bz2 from ftp://gcc.gnu.org/pub/gcc/libstdc++/doxygen/ and installed it. man std::vector is ok, while man std::sort and man std::algorithm both failed, ...
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122 views

Starting with SDL

Hy, i want to start learning/developing with the SDL library. I already found some usefull tutorials like lazyfoo.net. There I noticed there are many ways to use SDL (Console, IDE, ...). So can you ...