I have absolutely no idea about using gmp. Need some functions for a project and need a quick installation guide. I am Absolutely beginner to this field so please help accordingly.
I have:
Dev C++ 5.4.2 in windows 8.1 configuration with GCC4.7.2 as default
compiler.
gmp-static-mingw-4.1.tar
Please specify the correct procedure to configure gmp library.
At first put gmp.h into ..\Dev-Cpp\MinGW32\include and both libgmp.a and libgmp.la into ..\Dev-Cpp\MinGW32\lib directory, then create some project in DevCpp, for example:
#include <stdio.h>
#include <gmp.h>
int main(void)
{
mpz_t x;
mpz_init(x);
mpz_set_str(x, "12345", 10);
mpz_mul_ui(x, x, 2);
gmp_printf("%Zd\n", x);
mpz_clear(x);
return 0;
}
After that go to Project Options -> Parameters and click Add Library of Object:
From the list select libgmp.a file (your static library) and click Open:
Compile and run you project, you will see some note about Makefile update, simply confirm.
Note that GMP 4.1 is now rather old, consider latest version and/or manual compilation for best possible performance on your configuration.
Related
I am trying to use G+smo library from github. I download, unzip it and make. Then I could run all examples in the package. But there is no tutorial that guide me to build my own cpp file. For example I tried to build the simplest code from the tutorial:
# include <gismo.h>
using namespace gismo;
int main(int argc, char* argv[])
{
gsInfo << "Hello G+Smo.\n";
real_t a = 2.0; // a real number, ie. double
index_t b = 3; // an integer, ie. int
GISMO_ASSERT( a*b == 6, "This is an error, 2*3 should be 6.");
return 0;
}
And linked the lib file by -lgismo, but it says 'gismo.h: No such file or directory
compilation terminated'. I know it my be the fact that I am not familiar with c++. Can you guys give me some suggestion about it? Or, if it is overly obvious, can you just suggest me some book to read?
Thank you.
The error 'gismo.h: No such file or directory compilation terminated.' suggests that you didn't set the path where the compiler should look for the library headers. Try adding -I/path/to/gismo/headers to the compiler flags, e.g. on my system make install by default installed it to /usr/local/include/gismo so I have to add -I/usr/local/include/gismo.
By the way, there is a "tutorial": The README.txt in the deploy folder.
I'm experiencing .Call issues when running functions built with Rcpp on Windows, if my c++ code uses C++11 std::regex and I have found no way out so far.
Unlike prior questions on similar issues, I have had neither building nor linking issues. The Rcpp package builds and links fine using the C++11 plugin, making usable packages on my platform. constexpr and C++11-specific functions like std::stoi cause no issue when std::regex is not used.
Using Windows boost libs, I experienced linking issues, even when specifying PKG_LIBS="-L/path/to/boost/libs -lboost_regex", so I'd rather stick to std::regex.
The same packages build, install and run fine under linux, using vanilla std::regex or boost::regex.
I unfortunately found no solution in the fine Rcpp gallery examples.
Windows platform is :
R version 3.2.3 (2015-12-10)
x86_64-w64-mingw32/x64 (64-bit)
Running under:
Windows >= 8 x64 (build 9200)
Rcpp_0.12.3
Rtools 3.3.0.1959 running g++ 4.9.3 (x86_64-posix-seh,
built by MinGW-W64 project), normally C++11-compatible.
PKG_CXXFLAGS="-std=c++11"
The linux platform is similar except for g++ (version 5.3).
Below is a simplified code chunk for duplication.
#include <Rcpp.h>
#if defined(__linux__) && ! defined(FORCE_STL_BUILD)
#include <boost/regex.hpp>
#define reglib boost
#else
#include <regex>
#define reglib std
#endif
#include <string>
using namespace Rcpp;
// [[Rcpp::plugins(cpp11)]]
constexpr int a[3]= {2, 10, 15};
// [[Rcpp::export]]
int my_test(int prop, const std::string& index)
{
#ifndef NO_REG
static const reglib::regex test {"H.*A", reglib::regex::icase};
#endif
int index_int = std::stoi(index) + a[1] + prop;
return index_int;
}
This code runs OK when built using -DNO_REG. Otherwise invoking test::my_test(1, "1000") returns:
`Error in .Call("test_my_test", PACKAGE = "test", prop, index) :
"test_my_test" not available for .Call() for package "test"`
EDIT:
1. The question focuses on std::regex. Boost issues are only incidental comments.
2. Issues only arise after packaging, not using Rcpp::source("cppfile")
3. Packaging code:
R console:
Rcpp::Rcpp.package.skeleton("test", attributes=TRUE, example_code=FALSE, cpp_files="test.cpp")
Rcpp::compileAttributes("test")
CMD console:
REM paths to R/bin/x64 and Rtools/bin, Rtools/mingw_64/bin added to PATH
set PKG_CXXFLAGS=-std=c++11
R CMD build test
R CMD INSTALL test_1.0.tar.gz
ADDITIONAL EDIT:
.Call issues arise as soon as a regex is declared in the C++ code. Using it or no (as in std::regex_match) makes no change.
Can you try disentangling this some more? You are mixing a lot of things here.
Try maybe 'just' C++ from R first, with the newer g++ 4.9.3 compiler and see if that lets you use Boost as you hope. Your use case there is local and non-standard, so you have to work this out. We generally just recommend using BH without linking.
I don't actually see an Rcpp issue here. You are simply pushing the (working, tested, trusted) Rcpp setup into a corner it has not been used in yet. So you may need to work some things out yourself.
Also note that g++ 4.9.3 for R is not really released yet.
First of all I'm quit new in programming in c/c++, so maybe it's just a basic error but i don't get it. The Problem is, I want to use libpcap in a bigger application, but i can't even integrate the libary into a simple HelloWorld.cpp. Atm I'm using Eclipse (MinGw Compiler) with Windows 64bit, but consindering to switch to Linux if my Problem(s) can't be solved.
Downloaded "libpcap-1.5.3.tar.gz" from tcpdump.org, extracted and added the root directory of the Libary to Eclipse (under "Properties/C|C++ Build" to all Compilers and to the MinGW Linker).
My Code:
#include <iostream>
#include <pcap.h>
#include <stdio.h>
using namespace std;
int main(int argc, char *argv[]) {
cout << "Hello World!!!" << endl; // prints Hello World!!!
char *dev = argv[1];
printf("Device: %s\n", dev);
return(0);
}
First error:
D:\Tools\MinGW\lib\libpcap/pcap-stdinc.h:49:22: fatal error: bittypes.h: No such file or directory
So I changed line 49 from
#include "bittypes.h"
to
#include <Win32/Include/bittypes.h>
(the actual location of bittypes.h) and next error pops up:
D:\Tools\MinGW\lib\libpcap/pcap/pcap.h:451:1: error: 'Adapter' does not name a type
'Adapter' is defined in "pcap-int.h" so I included this header into "pcap.h" but now I get:
D:\Tools\MinGW\lib\libpcap/pcap-int.h:46:22: fatal error: Packet32.h: No such file or directory compilation terminated.
and this "Packet32.h" does not exist...
I can't belive this popular libary is broken, so where is my mistake? Thanks in advance!
The Problem is, I want to use libpcap in a bigger application, but i can't even integrate the libary into a simple HelloWorld.cpp. Atm I'm using Eclipse (MinGw Compiler) with Windows
If you want to use libpcap on Windows, you need a version of libpcap that's been ported to Windows. The libpcap source won't build on Windows; on UNIXes, libpcap can and does use packet capture mechanisms built into the OS, but it doesn't do so on Windows (for one thing, older versions of Windows, at least, don't have a packet capture mechanism built in!), so it also needs a driver.
One port of libpcap to Windows is WinPcap; it includes the necessary driver. If you install WinPcap, and then download the WinPcap developer's pack and install it, it should be possible to configure Eclipse so that your program can be built with WinPcap.
libpcap-1.5.3.tar.gz is a source package for the library, not a binary package. So you need to build the library; you can't just add the directory to Eclipse and expect it to work.
The usual way to build a source package is to unpack it into a directory and look for a file called README or INSTALL, which is a simple text file containing instructions on how to build and install the package for various machines. Often there will be multiple such files for different platforms.
Generally, there will be a script called configure that you run to create a Makefile for your target; then you run make to build the code and make install to install it in a standard place so that other packages can find it.
The following code shoudn't produce an error:
#include <cstdlib>
#include <cstdio>
#include <iostream>
using namespace std ;
int main ( int argc , char** argv )
{
int n ;
cin >> n ;
cout << n ;
return 0 ;
}
Yet a get a "RUN FAILED (exit value -1,073,741,511, total time: 46ms)" whilst running MinGW/Msys on Netbeans. Any advice like switching back to Cygwin?
I recommend using MinGW Distro if you want to develop C++ under a Microsoft Windows operating system. It ships with a pretty new GCC version and with the Boost libraries.
NetBeans IDE is pretty picky regarding the build environment settings. E.g. It doesn't work together with all versions of make (we have to distinct make.exe from MSYS and mingw32-make.exe from MinGW for example) and there are problems regarding the used Java Runtime Enviroment (JRE).
With the settings shown in the following screenshot you should be able to build your example with MinGW Distro and NetBeans 8. I recommend to not configure a absolute path to the make.exe file but add that path to your Microsoft Windows environment variable PATH. Otherwise you may get build errors.
Maybe these two blog posts help if you want to use the "default" MinGW distribution:
Installing Minimum GNU for Windows (MinGW)
Configure NetBeans IDE for Minimum GNU for Windows (MinGW)
I hope this helps others as well.
Not related to your question: Don't use using namespace std:
#include <iostream>
int main(int argc, char** argv) {
int n;
std::cin >> n;
std::cout << n;
return 0;
}
I ran into this same issue (with exit code -1,073,741,511), so though a dated question, I'm posting this here for anyone else who runs into the problem.
Run the executable for the program manually. You might get an error such as "the procedure entry point __gx_personality_v0 coud not be located in the dynamic library libstdc++-6.dll". (OP has confirmed this in a comment.)
The .dll file referred to in the error message above is either not being linked, or linked incorrectly. The correct version of the .dll that needs to be linked is the one in the ...\MinGW\bin directory. In Windows, you can check the .dll file being linked by typing where libstdc++-6.dll in a command prompt; the first result that is listed will be the file that is linked. If you already see ...\MinGW\bin\libstdc++-6.dll as the first result here, my fix below will not help you.
If you see a message "INFO: Could not find files for the given pattern(s).", then ...\MinGW\bin needs to be added to your %PATH% variable. (OP has already confirmed this was not the issue.)
The issue I was having was that a program I had installed had its own (likely outdated) version of libstdc++-6.dll, which was in a folder also included in my %PATH% variable, ahead of ...\MinGW\bin. This meant that this other .dll file was being picked up and linked to during execution. This can be fixed by editing your %PATH% variable to make sure the ...\MinGW\bin entry is ahead of all other directories that also have a version of the .dll file.
Edit: The other option is to statically link the .dll at program compilation, or place a copy of the correct .dll in the program executable directory. However, neither of these fixes is 'global', and needs to be done for each project individually.
Hope this helps!
I have QT 5.1.1 installed on my machine, but I'm having some troubles using it. I'm trying to run the following simple program that requires QT:
//Playing Video
#include "cv.h"
#include "opencv2\objdetect\objdetect.hpp"
#include "opencv2\core\core.hpp"
#include "opencv2\highgui\highgui.hpp"
#include "opencv2\features2d\features2d.hpp"
#include "opencv2\calib3d\calib3d.hpp"
#include "opencv2\nonfree\nonfree.hpp"
#include "highgui.h"
#include <openbr\openbr_plugin.h>
using namespace cv;
static void printTemplate(const br::Template &t)
{
const QPoint firstEye = t.file.get<QPoint>("Affine_0");
const QPoint secondEye = t.file.get<QPoint>("Affine_1");
printf("%s eyes: (%d, %d) (%d, %d)\n", qPrintable(t.file.fileName()), firstEye.x(), firstEye.y(), secondEye.x(), secondEye.y());
}
int main(int argc, char *argv[])
{
br::Context::initialize(argc, argv);
// Retrieve classes for enrolling and comparing templates using the FaceRecognition algorithm
QSharedPointer<br::Transform> transform = br::Transform::fromAlgorithm("FaceRecognition");
QSharedPointer<br::Distance> distance = br::Distance::fromAlgorithm("FaceRecognition");
// Initialize templates
br::Template queryA("../data/MEDS/img/S354-01-t10_01.jpg");
br::Template queryB("../data/MEDS/img/S382-08-t10_01.jpg");
br::Template target("../data/MEDS/img/S354-02-t10_01.jpg");
// Enroll templates
queryA >> *transform;
queryB >> *transform;
target >> *transform;
printTemplate(queryA);
printTemplate(queryB);
printTemplate(target);
// Compare templates
float comparisonA = distance->compare(target, queryA);
float comparisonB = distance->compare(target, queryB);
// Scores range from 0 to 1 and represent match probability
printf("Genuine match score: %.3f\n", comparisonA);
printf("Impostor match score: %.3f\n", comparisonB);
br::Context::finalize();
return 0;
}
It also requires OpenCV 2.4.6.1 and OpenBR, but that's not the problem.
All the definitions (variables and functions) in the above code that are related to QT are undefined. I've tried to find the relevant h files in QT folder and to include them, but that did not succeed since I couldn't fine qtcore.h (but a different file named qtcore with lot's of includes that I don't now how to use). I've tried to add QT "include" directory under "additional include directories" in the project properties but that didn't work either. I've also tried to add QT "lib" folder under "additional library directories" but that also did not work.
Basically, I tried everything I could think of. Can someone please explain how to I use those QT definitions? I'm really stuck and I could use any help given.
Thanks,
Gil.
(Optional) Update to Qt 5.2.
Start Qt Creator.
Create a new Qt Widgets Application project. You can give the class/files random names, it doesn't matter. Uncheck the "generate form" option, as you don't need any forms.
Remove all the files other than main.cpp from the project. You do this by right-clicking on them in the project tree on the left and choosing Remove File.
Copy-paste your code into main cpp. Make sure you completely replace main.cpp's contents, the default contents shouldn't be there anymore.
Add the opencv library to the project. Right-click on the project's root, select "Add Library", and go from there.
Re-run qmake by right-clicking on the project root and selecting "Run qmake".
Build and run the project by pressing Ctrl-R (Cmd-R on mac).
Qt uses a (non-standard) custom toolchain that has to run before the Qt-dependent code can be compiled. I've never tried using Qt outside of QtCreator, but if you really need Qt I'd suggest you use the QtCreator IDE; if you're not using it already of course. It's a very decent IDE, even for non-Qt projects.
Also, if you haven't done so already, make sure the Qt SDK is installed; the headers alone are not enough. QtCreator by itself is also not enough, you'll need the SDK. If you don't feel like doing so, my suggestion would be to look at Poco. It's not a 1:1 replacement for Qt, but a very mature framework nevertheless.