I'm building a code based on this fast factorial library, and it depends on boost and mpir. I'm running Ubuntu 14.04 and using Netbeans 8.0.2. To simply test the #include statements of the library I made this silly code:
#include <iostream>
#include <mpir.h>
#include <primeswing.h>
#include <xmath.h>
/*
*
*/
int main() {
long x = 4;
std::cout << x;
return 0;
}
When I try to compile it however I get the following error
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/arengorn/NetBeansProjects/BA'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/ba
make[2]: Entering directory `/home/arengorn/NetBeansProjects/BA'
mkdir -p dist/Debug/GNU-Linux-x86
g++ -o dist/Debug/GNU-Linux-x86/ba build/Debug/GNU-Linux-x86/main.o ->lm
build/Debug/GNU-Linux-x86/main.o: In function `__static_initialization_and_destruction_0':
/usr/include/boost/system/error_code.hpp:222: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:223: undefined reference to `boost::system::generic_category()'
/usr/include/boost/system/error_code.hpp:224: undefined reference to `boost::system::system_category()'
collect2: error: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/ba] Error 1
make[2]: Leaving directory `/home/arengorn/NetBeansProjects/BA'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/arengorn/NetBeansProjects/BA'
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 114ms)
Can anyone help me with why is the boost library (which is installed and present under /usr/include) is not working?
As commented by Wintermute
You need to link libboost_system.so. Put -lboost_system in your linker flags.
That solved the problem.
Related
I wanted to make gui apps in c++ and found SFML to be a good choice. Fortunately i am on linux so SFML(2.4) was already installed on my system.
So i started searching for some tutorials and found one that makes a simple window. But when i run the code i get an error saying undefined reference to sf::(function i am using). Here's the code
#include <SFML/Graphics.hpp>
int main(void)
{
sf::RenderWindow window(sf::VideoMode(640,480),"SFML working");
return 0;
}
And here's the error log.
cd '/home/jasper/NetBeansProjects/SFML'
/usr/bin/make -f Makefile CONF=Debug
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory '/home/jasper/NetBeansProjects/SFML'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux/sfml
make[2]: Entering directory '/home/jasper/NetBeansProjects/SFML'
mkdir -p dist/Debug/GNU-Linux
g++ -o dist/Debug/GNU-Linux/sfml build/Debug/GNU-Linux/main.o
build/Debug/GNU-Linux/main.o: In function `main':
/home/jasper/NetBeansProjects/SFML/main.cpp:6: undefined reference to `sf::String::String(char const*, std::locale const&)'
/home/jasper/NetBeansProjects/SFML/main.cpp:6: undefined reference to `sf::VideoMode::VideoMode(unsigned int, unsigned int, unsigned int)'
/home/jasper/NetBeansProjects/SFML/main.cpp:6: undefined reference to `sf::RenderWindow::RenderWindow(sf::VideoMode, sf::String const&, unsigned int, sf::ContextSettings const&)'
/home/jasper/NetBeansProjects/SFML/main.cpp:6: undefined reference to `sf::RenderWindow::~RenderWindow()'
collect2: error: ld returned 1 exit status
nbproject/Makefile-Debug.mk:62: recipe for target 'dist/Debug/GNU-Linux/sfml' failed
make[2]: *** [dist/Debug/GNU-Linux/sfml] Error 1
make[2]: Leaving directory '/home/jasper/NetBeansProjects/SFML'
nbproject/Makefile-Debug.mk:59: recipe for target '.build-conf' failed
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory '/home/jasper/NetBeansProjects/SFML'
nbproject/Makefile-impl.mk:39: recipe for target '.build-impl' failed
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 172ms)
I've tried searching for solution on google but couldn't find any effective one. So i thought some expert opinion would be good. Help please. Thanks
You forgot to link with SFML libraries. Those are at least:
sfml-graphics
sfml-window
sfml-system
As the documentation explains, on Linux it can be done like this:
g++ myapp.o -o myapp -lsfml-graphics -lsfml-window -lsfml-system
Or if using an IDE, specify them as Additional Dependencies in Linker settings.
I'm using the MinGW complier/make/etc files but whenever I try to run my code it spits this back out to me:
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/c/Users/Geneva/workspace/C++ Through Game Programming'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/MinGW-Windows/c___through_game_programming.exe
make[2]: Entering directory `/c/Users/Geneva/workspace/C++ Through Game Programming'
mkdir -p dist/Debug/MinGW-Windows
g++ -o dist/Debug/MinGW-Windows/c___through_game_programming build/Debug/MinGW-Windows/diceroll.o build/Debug/MinGW-Windows/main.o
build/Debug/MinGW-Windows/main.o: In function `main':
C:\Users\Geneva\workspace\C++ Through Game Programming/main.cpp:35: multiple definition of `main'
build/Debug/MinGW-Windows/diceroll.o:C:\Users\Geneva\workspace\C++ Through Game Programming/diceroll.cpp:16: first defined here
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/MinGW-Windows/c___through_game_programming.exe] Error 1
make[2]: Leaving directory `/c/Users/Geneva/workspace/C++ Through Game Programming'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/c/Users/Geneva/workspace/C++ Through Game Programming'
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 1s)
I have my environment variable PATH set right, when I installed the gbd I just extracted it to the normal C:\MinGW\bin so that I wouldn't have to do C:\MinGW\msys\1.0\bin
Can anyone help out? If I can't figure this out I'm going to go back to coding in Java
The compiler message is clear: You have defined multiple main() functions
I am using netbeans IDE on ubuntu for c++ and whenever i am running a program i am getting an error of BUILD_FAIL
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/rupesh/NetBeansProjects/Cpp1'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/cpp1
make[2]: Entering directory `/home/rupesh/NetBeansProjects/Cpp1'
mkdir -p dist/Debug/GNU-Linux-x86
g++-o dist/Debug/GNU-Linux-x86/cpp1 build/Debug/GNU-Linux-x86/main.o build/Debug/GNU- Linux-x86/1.o
build/Debug/GNU-Linux-x86/1.o: In function `main':
/home/rupesh/NetBeansProjects/Cpp1/1.cpp:4: multiple definition of `main'
build/Debug/GNU-Linux-x86/main.o:/home/rupesh/NetBeansProjects/Cpp1/main.cpp:15: first defined here
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/cpp1] Error 1
make[2]: Leaving directory `/home/rupesh/NetBeansProjects/Cpp1'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/rupesh/NetBeansProjects/Cpp1'
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 190ms)
I am running a simple program to print hello world.
From what the compiler is spitting out, it seems you have two files that specify a main() being built as one project.
/home/rupesh/NetBeansProjects/Cpp1/1.cpp:4: multiple definition of
`main'
build/Debug/GNU-Linux-x86/main.o:/home/rupesh/NetBeansProjects/Cpp1/main.cpp:15:
first defined here collect2: ld returned 1 exit status make[2]: *
[dist/Debug/GNU-Linux-x86/cpp1] Error 1
check your folders to make sure you have no other files that the compiler is attempting to build in with main.cpp, in this case look for a 1.cpp
I'm new to c/c++ and I guess I have some basic problem. I get undefined reference to u_fopen_48' error when compiling:
#include <unicode/ustdio.h>
int main(int argc, char** argv) {
UFILE* ufile = u_fopen("/home/emstol/Desktop/utf8demo.txt", "r", NULL, "utf8");
return 0;
}
Doc for this function is here. I'm using ICU 4.8.1 (compiled myself, step by step according to readme.html ;)), NetBeans with g++ underneath. If it helped this is what I see during building:
"/usr/bin/make" -f nbproject/Makefile-Debug.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/home/emstol/NetBeansProjects/TextFairy1'
"/usr/bin/make" -f nbproject/Makefile-Debug.mk dist/Debug/GNU-Linux-x86/textfairy1
make[2]: Entering directory `/home/emstol/NetBeansProjects/TextFairy1'
mkdir -p dist/Debug/GNU-Linux-x86
g++ -o dist/Debug/GNU-Linux-x86/textfairy1 build/Debug/GNU-Linux-x86/main.o
build/Debug/GNU-Linux-x86/main.o: In function `main':
/home/emstol/NetBeansProjects/TextFairy1/main.cpp:4: undefined reference to `u_fopen_48'
collect2: ld returned 1 exit status
make[2]: *** [dist/Debug/GNU-Linux-x86/textfairy1] Error 1
make[2]: Leaving directory `/home/emstol/NetBeansProjects/TextFairy1'
make[1]: *** [.build-conf] Error 2
make[1]: Leaving directory `/home/emstol/NetBeansProjects/TextFairy1'
make: *** [.build-impl] Error 2
You seem to have forgotten to link the library you used. You should refer to This page for instructions.
When building composite projects the compiler can't just easily find all it's required references. Most libraries come in the form of a shared object file (.so) and without their C code to be compiled along with the rest of your project, while only supplying the headers for their functions. This allows the compiler to create "sockets" in the code for the functions to be placed into, but without telling the linker where these functions should be taken from - the link process will simply fail.
You must, therefore, explicitly tell the linker where to search for the symbols it will seek, and this is usually done with the -l flag, though it would appear the ICU library has taken a somewhat different approach to it.
I'm using OpenCV in Windows 7 64bits and Netbeans 7.0. I tried to compile the next code using MinGW and cygwin but both fails with undefined references.
When I use MAT or FLANN and others I can't compile, but I'm adding all libraries (I tried only adding Debug ones, Release ones, only needed ones... but fails).
The same code in ubuntu works, but I need to compile it in windows too. I'm using the 2.3 compiled version (using CMake) and the installable one.
#include "opencv2\opencv.hpp"
#include <iostream>
using namespace std;
int main(void)
{
cv::Mat::eye(1, 1, 0);
return 0;
}
"/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .clean-conf
make[1]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
rm -f -r build/Release
rm -f dist/Release/Cygwin-Windows/opencv23sandbox.exe
make[1]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
CLEAN SUCCESSFUL (total time: 1s)
"/usr/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
"/usr/bin/make" -f nbproject/Makefile-Release.mk dist/Release/Cygwin-Windows/opencv23sandbox.exe
make[2]: Entering directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
mkdir -p build/Release/Cygwin-Windows
rm -f build/Release/Cygwin-Windows/main.o.d
g++.exe -c -O2 -I/cygdrive/C/OpenCV2.3/build/include -MMD -MP -MF build/Release/Cygwin-Windows/main.o.d -o build/Release/Cygwin-Windows/main.o main.cpp
mkdir -p dist/Release/Cygwin-Windows
g++.exe -o dist/Release/Cygwin-Windows/opencv23sandbox build/Release/Cygwin-Windows/main.o -L/cygdrive/C/OpenCV2.3/build/x86/vc10/lib -lopencv_calib3d230 -lopencv_calib3d230d -lopencv_contrib230 -lopencv_contrib230d -lopencv_core230 -lopencv_core230d -lopencv_features2d230 -lopencv_features2d230d -lopencv_flann230 -lopencv_flann230d -lopencv_gpu230 -lopencv_gpu230d -lopencv_haartraining_engine -lopencv_haartraining_engined -lopencv_highgui230 -lopencv_highgui230d -lopencv_imgproc230 -lopencv_imgproc230d -lopencv_legacy230 -lopencv_legacy230d -lopencv_ml230 -lopencv_ml230d -lopencv_objdetect230 -lopencv_objdetect230d -lopencv_video230 -lopencv_video230d
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0xac): undefined reference to `cv::Mat::eye(int, int, int)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x106): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x16f): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x1dd): undefined reference to `cv::fastFree(void*)'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x1fa): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x20a): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text+0x21a): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x66): undefined reference to `cv::Mat::deallocate()'
build/Release/Cygwin-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x5e): undefined reference to `cv::fastFree(void*)'
collect2: ld returned 1make[2]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
make[1]: Leaving directory `/cygdrive/f/Proyectos/C++/OpenCV23Sandbox'
exit status
make[2]: *** [dist/Release/Cygwin-Windows/opencv23sandbox.exe] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 2s)
Trying with MinGW libs:
"/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .clean-conf
make[1]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
rm -f -r build/Release
rm -f dist/Release/MinGW-Windows/opencv23sandbox.exe
make[1]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
CLEAN SUCCESSFUL (total time: 350ms)
"/bin/make" -f nbproject/Makefile-Release.mk QMAKE= SUBPROJECTS= .build-conf
make[1]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
"/bin/make" -f nbproject/Makefile-Release.mk dist/Release/MinGW-Windows/opencv23sandbox.exe
make[2]: Entering directory `/f/Proyectos/C++/OpenCV23Sandbox'
mkdir -p build/Release/MinGW-Windows
rm -f build/Release/MinGW-Windows/main.o.d
g++.exe -c -O2 -I/C/OpenCV2.3/build/include -MMD -MP -MF build/Release/MinGW-Windows/main.o.d -o build/Release/MinGW-Windows/main.o main.cpp
mkdir -p dist/Release/MinGW-Windows
g++.exe -o dist/Release/MinGW-Windows/opencv23sandbox build/Release/MinGW-Windows/main.o -L../OpenCV/OpenCV2.3/build/x86/mingw/lib ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_calib3d230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_contrib230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_core230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_features2d230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_flann230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_gpu230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_highgui230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_imgproc230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_legacy230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_ml230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_objdetect230.dll.a ../OpenCV/OpenCV2.3/build/x86/mingw/lib/libopencv_video230.dll.a
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x4f): undefined reference to `cv::Mat::eye(int, int, int)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0xac): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x11a): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x191): undefined reference to `cv::fastFree(void*)'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1a7): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1ba): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text+0x1ce): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x74): undefined reference to `cv::Mat::deallocate()'
build/Release/MinGW-Windows/main.o:main.cpp:(.text$_ZN2cv3MatD1Ev[cv::Mat::~Mat()]+0x63): undefined reference to `cv::fastFree(void*)'
collect2: ld returned 1 exit status
make[2]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
make[1]: Leaving directory `/f/Proyectos/C++/OpenCV23Sandbox'
make[2]: *** [dist/Release/MinGW-Windows/opencv23sandbox.exe] Error 1
make[1]: *** [.build-conf] Error 2
make: *** [.build-impl] Error 2
BUILD FAILED (exit value 2, total time: 1s)
or
g++.exe -o dist/Release/MinGW-Windows/opencv23sandbox build/Release/MinGW-Windows/main.o -L../OpenCV/OpenCV2.3/build/x86/mingw/lib -lopencv_calib3d230.dll -lopencv_contrib230.dll -lopencv_core230.dll -lopencv_features2d230.dll -lopencv_flann230.dll -lopencv_gpu230.dll -lopencv_highgui230.dll -lopencv_imgproc230.dll -lopencv_legacy230.dll -lopencv_ml230.dll -lopencv_objdetect230.dll -lopencv_video230.dll
same result.
Are you using the precompiled MinGW libraries? (it appears so). I tried for a couple of days to get my project to link successfully under Code::Blocks. I was seeing the same sort of errors you describe (bad references, etc).
I finally recompiled OpenCV using the steps shown here, and all became well.
I guess the Problem is that the library path points to the vc10 directory (-L/cygdrive/C/OpenCV2.3/build/x86/vc10/lib) instead of the mingw directory (-L/cygdrive/C/OpenCV2.3/build/x86/mingw/lib). The ld-linker can't find the methods because they are mangled for the vc++ "link.exe".
If you use 64 bit, then you have also link against 64-bit libs:
-L/cygdrive/C/OpenCV2.3/build/x64/mingw/lib.
I have exactly the same issue. I am trying to compile my program under a 64-bit Windows 7 machine with MinGW. Here is several possibilities that may result in the problem:
1) You need to make sure OpenCV2.3/build/x64/mingw/lib is link. Be careful, don't link the project to the libs for visual studio or libs for x86.
2) Make sure the proper dlls are copied to the project directory, or have been added to PATH. For example, if you use this lib libopencv_core243.dll.a, you should make sure libopencv_core243.dll can be loaded by the project. This is not the cause of the problem. But I think it is also important to know.
3) Make sure the MinGW can compile x64 programs. This is what I use: mingw-w64 (But since mingw-w64 project is moving to mingw-w64.org it's better to use the new website). Unfortunately, the one that download from MinGW32 won't work. And the link from the official site of MinGW will bring you to a second one (MinGW32).
4) By default, MinGw may compile your project to a 32 bit program. In order to make sure it compiles for 64 bit, add this compile flag -m64. Otherwise, if you only link the project with all the 64-bit libs, it will result in the problem as well.