undefined-reference

Why is curses on linux giving me following error?

由 只谈情不闲聊 提交于 2019-11-27 16:23:13
问题 Trying to get getch() working to capture key press. #include <curses.h> ... ... WINDOW *w; char f; w = initscr(); timeout(3000); f = getch(); endwin(); is giving me following error:- undefined reference to `wgetch' undefined reference to `stdscr' 回答1: That's a linking error. Are you linking to the curses library correctly? There are two steps involved in using a library in C. You #include the relevant header files from your source files. This is so your code knows what signatures of the

Undefined reference to template members

由 对着背影说爱祢 提交于 2019-11-27 15:22:29
I'm new to C++, and preparing a homework by using NetBeans IDE on Ubuntu 10.04. I use g++ as a C++ compiler. The error message: build/Debug/GNU-Linux-x86/Maze.o: In function `Maze': Maze/Maze.cpp:14: undefined reference to `Stack<Coordinate>::Stack()' Maze/Maze.cpp:14: undefined reference to `Stack<Coordinate>::Stack()' Maze/Maze.cpp:69: undefined reference to `Stack<Coordinate>::push(Coordinate)' Maze/Maze.cpp:79: undefined reference to `Stack<Coordinate>::isEmpty()' Maze/Maze.cpp:87: undefined reference to `Stack<Coordinate>::destroy()' And my related code: Maze.h #include "Coordinate.h"

Qt: Signals and slots Error: undefined reference to `vtable for

由 心不动则不痛 提交于 2019-11-27 15:00:20
Following example from this link: http://developer.kde.org/documentation/books/kde-2.0-development/ch03lev1sec3.html #include <QObject> #include <QPushButton> #include <iostream> using namespace std; class MyWindow : public QWidget { Q_OBJECT // Enable slots and signals public: MyWindow(); private slots: void slotButton1(); void slotButton2(); void slotButtons(); private: QPushButton *button1; QPushButton *button2; }; MyWindow :: MyWindow() : QWidget() { // Create button1 and connect button1->clicked() to this->slotButton1() button1 = new QPushButton("Button1", this); button1->setGeometry(10

Compiling with Clang using Libc++ undefined references

由 只愿长相守 提交于 2019-11-27 13:33:13
问题 The first couple are too long to reference. I get this error when I try to compile clang++ -stdlib=libc++ ../main.cc ... with clang and libc++ from the SVN. error: undefined reference to 'typeinfo for char const*' error: undefined reference to '__cxa_allocate_exception' error: undefined reference to '__cxa_throw' /tmp/cc-pbn00y.o:../main.cc:function std::__1::deque<double, std::__1::allocator<double> >::__add_back_capacity(): error: undefined reference to '__cxa_begin_catch' /tmp/cc-pbn00y.o:

Undefined reference C++

由 社会主义新天地 提交于 2019-11-27 09:25:35
I'm trying to compile my first legit program that I'm converting from Java (I ran a test hello world type program to check my compiler and it works). There are three files: main.cpp #include <iostream> #include "skewNormal.h" using namespace std; double getSkewNormal(double, double); int main(int argc, char **argv) { cout << getSkewNormal(10.0, 0.5) << endl; } skewNormal.cpp #define _USE_MATH_DEFINES #include <iostream> #include <math.h> using namespace std; #include <skewNormal.h> double SkewNormalEvalutatable::evaluate(double x) { return 1 / sqrt(2 * M_PI) * pow(M_E, -x * x / 2); }

undefined reference to `__stack_chk_fail'

由 為{幸葍}努か 提交于 2019-11-27 08:50:01
Getting this error while compiling C++ code: undefined reference to `__stack_chk_fail' Options already tried: added -fno-stack-protector while compiling - did not work, error persists added a dummy implementation of void __stack_chk_fail(void) in my code. Still getting the same error. Detailed Error: /u/ac/alanger/gurobi/gurobi400/linux64/lib/libgurobi_c++.a(Env.o)(.text+0x1034): In function `GRBEnv::getPar/u/ac/alanger/gurobi/gurobi400/linux64/lib/libgurobi_c++.a(Env.o)(.text+0x1034): In function `GRBEnv::getParamInfo(GRB_StringParam, std::basic_string<char, std::char_traits<char>, std:

Undefined Reference to

由 北战南征 提交于 2019-11-27 08:18:30
When I compile my code for a linked list, I get a bunch of undefined reference errors. The code is below. I have been compiling with both of these statements: g++ test.cpp as well as g++ LinearNode.h LinearNode.cpp LinkedList.h LinkedList.cpp test.cpp I really do not understand why I am getting these errors because I am really rusty on classes in C++. I could really use some help. LinearNode.h: #ifndef LINEARNODE_H #define LINEARNODE_H #include<iostream> using namespace std; class LinearNode { public: //Constructor for the LinearNode class that takes no arguments LinearNode(); //Constructor

c++ “ undefined reference to 'Foo::Foo(std::string)' ”

由 蹲街弑〆低调 提交于 2019-11-27 08:08:17
问题 I'm not too familiar with c++ and how instantiating objects work, so this is probably a very simple thing to solve. When I compile with g++ I get the error " undefined reference to 'Foo::Foo(std::string)' ". I want to create an instance of the class Foo that has a string parameter in its constructor. Here is the code: Foo.h #include <string> using namespace std; class Foo { public: Foo(string s); private: string id; }; Foo.cpp #include <string> #include "Foo.h" using namespace std; Foo::Foo

crt1.o: In function `_start': - undefined reference to `main' in Linux

由 淺唱寂寞╮ 提交于 2019-11-27 06:58:51
I am porting an application from Solaris to Linux The object files which are linked do not have a main() defined. But compilation and linking is done properly in Solaris and executable is generated. In Linux I get this error /usr/lib/gcc/x86_64-redhat-linux/4.1.2/../../../../lib64/crt1.o: In function `_start': (.text+0x20): undefined reference to `main' My problem is, I cannot include new .c/.o files since its a huge application and has been running for years. How can I get rid of this error? Code extractes of makefile: RPCAPPN = api LINK = cc $(RPCAPPN)_server: $(RPCAPIOBJ) $(LINK) -g $

Should a virtual function essentially have a definition?

由 最后都变了- 提交于 2019-11-27 03:01:08
问题 Is it essential to have a definition for a virtual function? Consider this sample program below: #include <iostream> using namespace std; class base { public: void virtual virtualfunc(); }; class derived : public base { public: void virtualfunc() { cout << "vf in derived class\n"; } }; int main() { derived d; return 0; } This gives the link-error: In function base::base() :: undefined reference to vtable for base I do not have the definition for the virtual function in base class. Why is this
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