systemc library can't be opened with vs 2013 - c++

I am new to systemc programming.For the installation, I followed this tutorial to install and startup. I am trying to build a simple main program. However I am getting the error
error LNK1104: cannot open file "systemc.lib".
Now with a simple directory search, I am not finding the file. However it seems that removing it causes more damages.
According to this poste The fact that the tutorial is for vs2010 and I am using vs2013 shouldn't be a problem.
How do I move foward. What should I do. Here is the code:
// Hello_world is module name
SC_MODULE(hello_world) {
SC_CTOR(hello_world) {
// Nothing in constructor
}
void say_hello() {
//Print "Hello World" to the console.
cout << "Hello World.\n";
}
};
// sc_main in top level function like in C++ main
int sc_main(int argc, char* argv[]) {
hello_world hello("HELLO");
// Print the hello world
hello.say_hello();
return(0);
}

From your second link, the reason why you don't have the library is simple: because you didn't build it. You should have the source files to build the library.

Related

Getting std::bad_alloc when trying to open image with exiv2

Hello I'm trying to read metadata from image using exiv2, but when opening the file I get the following error: Microsoft C++ exception: std::bad_alloc
I'm using default c++ visual studio 2019 compiler.
#include <iostream>
#include "exiv2/exiv2.hpp"
inline bool file_exists(const std::string& name) {
struct stat buffer;
return (stat(name.c_str(), &buffer) == 0);
}
int main(void)
{
try
{
Exiv2::XmpParser::initialize();
::atexit(Exiv2::XmpParser::terminate);
#ifdef EXV_ENABLE_BMFF
Exiv2::enableBMFF();
#endif
const char* file = "E:/img/DJI_0001.jpg";
if (!file_exists(file)) return 0;
Exiv2::Image::AutoPtr image = Exiv2::ImageFactory::open(file);
assert(image.get() != 0);
image->readMetadata();
}
catch (Exiv2::Error& e) {
std::cout << "Caught Exiv2 exception '" << e.what() << "'\n";
return -1;
}
This is probably due to an ABI incompatibility between your C++ standard library version and the one exiv2 was compiled with. I suppose you are using a pre-built exiv2 library?
You can check this by calling Exiv2::versionNumber() vs Exiv2::versionString(). The former will work but the latter probably crash because of the std::string involved.
Solution: Do not use the pre-compiled version of exiv2 but compile it yourself within the same dev environment of your main project.
I had the same problem with the open method.
I followed the instructions of matthias and build the lib myself.
First the error remained. I then created specific versions for Debug and Release and used the appropriate version for my program.
This fixed the issue on my side.
Edit: I also tried the pre-compiled version with my release build. That was also working well.

cannot find -lC:\SQLAPI\lib\sqlapi.lib in omnet++ IDE

I am running my simple C++ program in OMNET ++ IDE
My code is as follows
**#include <stdio.h> // for printf
#include <string.h>
#include <SQLAPI.h> // main SQLAPI++ header
//#include <asaAPI.h>
int main(int argc, char* argv[])
{
SAConnection con;
con.setOption( "UseAPI" ) = "DB-Library";
con.setClient( SA_SQLServer_Client );
try
{
con.Connect(
"paper2"
"NADRA",
"",
SA_SQLServer_Client);
printf("We are connected!\n");
// Disconnect is optional
// autodisconnect will occur in destructor if needed
//con.Disconnect();
printf("We are disconnected!\n");
}
catch(SAException &x)
{
// SAConnection::Rollback()
// can also throw an exception
// (if a network error for example),
// we will be ready
try
{
// on error rollback changes
//con.Rollback();
}
catch(SAException &)
{
}
// print error message
printf("%s\n", (const char*)x.ErrText());
}
return 0;
}**
I have already linked all the files but the error that i am getting is as follow
c:/mingw/bin/../lib/gcc/mingw32/6.3.0/../../../../mingw32/bin/ld.exe: cannot find -lC:\SQLAPI\lib\sqlapi.lib
collect2.exe: error: ld returned 1 exit status
Where as the file sqlapi.lib is in the same folder but linker is not able to find it. Can someone tells me about the issue that why compiler is not able to link it .I am using MINGW as a C++ compiler. The screen shot is attached by with the question about the linked filesenter image description here
If you are using -l, then it should be followed by the library name only, so something like:
-lsqlapi
If you want to specify a search path, then:
-lsqlapi -LC:\SQLAPI\lib\
(Usually the path is in Linux mode, so `C:/SQLAPI/lib though).
Then if this doesn't work, you can always force the library to be linked by just using it as another object:
C:/SQLAPI/lib/sqlapi.lib
Note though that gcc doesn't link against Visual Studio static libraries, which sqlapi might (because of the extension being .lib and not .a, but then this may be the export library for a dll).

Pybind11 - Where to put PYBIND11_MODULE

Im currently playing around with pybind11 a bit. Im trying to create a C++ class which then gets passed to a python interpreter embedded in my C++ source.
I created some dummy class just to test the basic functionality I kept everything in a single source file. This approach compiled and ran without any problems.
Now I separated my dummy Class Test into a Test.h and Test.cpp
Test.h
#pragma once
#include<iostream>
#include"pybind11\pybind11.h"
namespace py = pybind11;
class Test
{
public:
Test(const std::string &s);
~Test();
void printStr();
private:
std::string _s;
};
Test.cpp
#include "Test.h"
PYBIND11_MODULE(TestModule, m)
{
py::class_<Test>(m, "Test")
.def(py::init<const std::string &>())
.def("printStr", &Test::printStr);
}
Test::Test(const std::string &s) : _s(s)
{
}
Test::~Test()
{
}
void Test::printStr()
{
std::cout << "---> " << _s << std::endl;
}
main.cpp
#include"Test.h"
int main(int argc, char **argv)
{
PyImport_AppendInittab("TestModule", PyInit_TestModule);
Py_Initialize();
PyRun_SimpleString("import TestModule");
PyRun_SimpleString("t = TestModule.Test(\"str\")");
PyRun_SimpleString("t.printStr()");
Py_Finalize();
getchar();
return 1;
}
After putting the Class Test into a new file the Compiler cannot find the PyInit_TestModule (main.cpp line: 6) anymore since this is generated by the PYBIND11_MODULE Macro which lives in the Test.cpp file(MSVS2017 Error: C2065).
I tried putting the PYBIND11_MODULE Macro into the Test.h. This however resulted in a linker error which said that "_PyInit_TestModule" is already defined in main.obj (MSVS2017 Error: LNK2005)
Putting the PYBIND11_MODULE Macro in the main.cpp file works.
However I feel like this will become quite unreadable as soon as you put a lot of custom Module definitions into main.cpp or even worse you have multiple Python-Interpreter being started from different source files where you then
need to put the same definition in all those files which will be a mess and most likely turn into a linker error.
Has one of you faced the same Problem and how did you solve it?
I created a file of his own for the bindings, and compiled/linked it together with the original c++ file. This way:
1) Test.h + Test.cpp contain only c++ code of your class
2) Test-bindings.cpp contains the PYBIND11_MODULE and #include <Test.h>
3) Building (with cmake). You will get a PyTest.so file out of it, that you can load in python.
# c++ libray
add_library(TestLib SHARED /path/to/Test.h /path/to/Test.cpp)
# bindings
add_subdirectory(pybind11) # you must have downloaded this repo
include_directories(/path-only/to/Test.h)
pybind11_add_module(PyTest SHARED /path/to/Test-bindings.cpp /path/to/Test.cpp)
4) (I suggest you to) write the main in python, using the python-binding you just created
5) In your main.py
import PyTest
# do something

How to execute compiled C++ code outside MinGW bin folder?

Hi I'm compiling C++ code using MinGW G++ compiler. I've also added the PATH to the address C:\MinGW\bin; as an environment variable.
I can access G++ from command prompt and compile the code, but I can only execute the file if the .exe file is in the bin folder. (I'm guessing it requires the .dll files).
If the .cpp file is compiled outside of bin folder, it is giving me an error:
The procedure entry point __cxa_throw_bad_array_new_length could not be located in the dynamic link library C:\MinGW\testcode.exe
Is there any way I can compile and also execute the code directly from command prompt if it's in other folders?
This is a program that I worked with:
// Cpp program to illustrate the
// concept of Constructors
#include <iostream>
using namespace std;
class construct
{
public:
int a, b;
// Default Constructor
construct()
{
a = 100;
b = 200;
}
};
int main()
{
// Default constructor called automatically
// when the object is created
construct c;
cout << "a: "<< c.a << endl << "b: "<< c.b;
return 1;
}
If I compile basic code like "Hello World", it is running outside of the bin folder. But for a bit bigger code like the one above isn't executing.
The compilation command that I'm using is:
g++ testcode.cpp -o testcode

Visual Studio 2010 debugger points to wrong line

The debugger in Visual Studio 2010 is recently pointing at the wrong lines and/or skipping lines and I have no idea why this is. This is a CUDA project and only happens in CUDA files. I've noticed the following:
It always happens at the same part of the program.
The lines it points to are always the same, i.e. not random.
Putting extra code after the culprit lines changes which lines it points to.
It only happens in .cu-files. Moving the code to a .cpp-file does not recreate the problem.
What I have tried:
Clean and rebuilt the solution.
Install SP1 for MSVC10 and do all possible updates via Windows Updates
Set the compiler to not use optimizations in debug mode for both C/C++ and CUDA C/C++
Manually delete all created files and then rebuild from the solution folder.
Deleting the folder C:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files
Recreating the solution only using the source files.
Disabling my extensions.
I've managed to reduce the code to the following which might reproduce the problem. Mind that this code has to be inside a .cu-file and most probably needs to be compiled with the cuda compiler for C/C++. Including boost is not really necessary, but this example does show what problems I'm having. A shorter example is at the back.
#include <boost/numeric/ublas/matrix.hpp>
using boost::numeric::ublas::matrix;
struct foo {
foo() : mat(NULL) {}
matrix<float>* mat;
};
bool func(foo *data) {
bool status; // <- skipped line
status = false;
if (status) {
std::cout << "test\n";
return (status); // <- error reported here
}
int size = data->mat->size1(); // instead of here
return status;
}
int main(int args, char* argv[]) {
func(NULL); // force error by passing NULL pointer
return 0;
}
Does anyone have any idea how to solve this or how this could be happening? It's pretty annoying having to debug this way.
Shorter example only showing the skipping lines. No external libraries necessary.
bool func() {
bool status; // <- skipped line
status = false;
return status;
}
int main(int args, char* argv[]) {
func();
return 0;
}
Since the program only contains CPU instructions and variable declarations of types that have no construction contain no instructions, the debugger will not stop there. It just executes instructions and then uses the debugging information that the compiler provided to find the relevant line of source code.