Netbeans fails compilation on:
#include <string>
Output says:
main.c:10:18: fatal error: string: No such file or directory
#include <string>
The previous two declarations are included fine:
#include <stdio.h>
#include <stdlib.h>
I have removed all the code afterwards to make sure.
I am using cygwin_64 and it installed as per Netbeans c++ installation manual and shows versions in CLI
I am new to C++ and I know there have been similar questions, but the answers didn't help me.
Just try to create new project and follow these steps:
Click File->Create project.
Choose C/C++, then C/C++ application, click Next.
Enter project name and in the right choose C++ in combobox. Or C++11.
Related
I recently installed CGAL from their website. I used the native installer that is up to download on the website, and after selecting a directory, the installation completed. I am looking through the User Manual and trying to run some basic code, but I keep getting a compiler error. The code that I run is this (it is straight from the user manual):
// example: construct a quadratic program from data
// the QP below is the first quadratic program example in the user manual
#include <iostream>
#include <cassert>
#include <CGAL/basic.h>
#include <CGAL/QP_models.h>
#include <CGAL/QP_functions.h>
// choose exact integral type
#ifdef CGAL_USE_GMP
#include <CGAL/Gmpz.h>
typedef CGAL::Gmpz ET;
#else
#include <CGAL/MP_Float.h>
typedef CGAL::MP_Float ET;
#endif
int main()
{
}
It is just a simple QP problem, using the syntax straight from the website. However, when I try to run it, I receive this compiler error:
C:\...\include\CGAL\config.h|161|fatal error: CGAL/compiler_config.h: No such file or directory|
I used the installer straight from the website, but CGAL is still giving me these issues. Does anyone know how to solve it? Thank you.
According to the documentation (https://doc.cgal.org/latest/Manual/installation.html#title5), after installing CGAL on Windows, you still need to build the library itself.
This process will (I suspect) create the missing configuration files according to the compiler you have (gcc 7.3).
i have installed OpenCV 3.10 and the linked the opencv_world310.lib to release and opencv_world310d.lib to debug.
Moreover I put the compiler options in search directory to ...opencv\build\include. I got a undefined reference error when i left out #include <opencv2/highgui.hpp. Now that i have included it my code looks like this:
#include <stdio.h>
#include "opencv/cv.h"
#include "opencv/highgui.h"
#include <opencv2/highgui.hpp>
int main(void){
printf("HALLO!");
return 0;
}
When i try to build it core.hpp opens and the error: core.hpp must be compiled in C++ occurs.
I am using the GNU GCC Compiler in Codeblocks.
What should i do to solve the problem?
Check you compiler options. Open CV 3.10 C++ API requires code to be compiled as C++, but not C. You can use answer to "CodeBlocks: change project language c and c++" question to change the options.
Also use the new Open CV 3.10 API
#include <opencv2/opencv.hpp>`
instead of all the other Open CV header files. This header includes core functionality. To enable highgui module you need to define HAVE_OPENCV_HIGHGUI in your project settings.
CodeLite 7.0, Windows 7, MinGW installed, autocomplete cannot find anything c++ related. I have a workspace and a project in it (just started with CodeLite).
When I try to include a c++ header (e.g. string or vector) or use those classes in my code i get no autocomplete. Compiling and running works fine, just the autocomplete does not.
Under CodeLite->Settings->Code Completion->CTags there is a list of MinGW's include folders for c++ (I checked, all headers are in those folders).
Am I missing something?
What happens when you go to :
CodeLite -> Workspace -> Retag Workspace (full) , does it change anything?
And just to make sure: you do have a workspace and project, right?
Eran
I may be way off base here, but found a similar (same?) issue.
This does NOT work:
#include <vector>
using std::vector;
vec (No autocomplete)
However, both other ways work as expected:
#include <vector>
std::vec (Yes autocomplete)
OR:
#include <vector>
using namespace std;
vec (Yes autocomplete)
Error: cannot open source file "GL/glew.h"
I have the following code :
//Include GLEW
#include <GL/glew.h>
//Include GLFW
#include <GLFW/glfw3.h>
//Include the standard C++ headers
#include <stdio.h>
#include <stdlib.h>
//Define an error callback
static void error_callback(int error, const char* description)
{
...
I took from there: http://www.41post.com/5178/programming/opengl-configuring-glfw-and-glew-in-visual-cplusplus-express#part4
In order to have a somewhat portable solution, before I even started Visual Studio 2013 I created two System Environment Variable in windows.
GLEW=C:\Install\Development\C++\Framework\glew-1.10.0-win32\glew-1.10.0
GLFW=C:\Install\Development\C++\Framework\glfw-3.0.4.bin.WIN32\glfw-3.0.4.bin.WIN32
So in my project I could for instance write a additional include folder as: %GLEW%\include
As I said, it builds fine and runs fine as well.
Yet, not having intellisense behave properly is really annoying.
How to fix it?
My syntax was actually wrong, you cant use global environment variable in VS using %<name>% but you have to use $(%<name>).
Wherever I wrote %GLEW%\include I should have $(GLEW)\include.
It's working fine now.
Though I'm completely clueless why it built.
This post: https://stackoverflow.com/a/11543754/910813 got me to remind that.
I am trying to build a C++ app that uses both websocketpp and MySQL. I have encountered 2 build problems using VS 2010 C++ Express.
1) A problem with the boost libraries. It produces many errors like this:
1>c:\program files (x86)\boost\boost_1_50\boost\thread\win32\thread_data.hpp(210): error C2146: syntax error : missing ')' before identifier 'rel_time'
Here's the relevant snippet from thread_data.hpp starting with line 210:
inline BOOST_SYMBOL_VISIBLE void sleep(TimeDuration const& rel_time)
{
interruptible_wait(detail::pin_to_zero(rel_time.total_milliseconds()));
}
2) A conflict with the word VERSION which is documented here and I believe is independent.
To make a clear and simple example of the boost build problems, I'm using the websocketpp example: echo_server.cpp to which I added these includes:
#include "stdafx.h"
Boost lib includes recommended by "Building a program with websocketpp" on the websocketpp site.
#include <boost/regex.hpp>
#include <boost/random.hpp>
#include <boost/system/api_config.hpp>
#include <boost/system/config.hpp>
#include <boost/system/error_code.hpp>
#include <boost/system/system_error.hpp>
#include <boost/system/windows_error.hpp>
and the MySQL header includes. Adding these 2 boostincludes triggers the build errors. If I comment out these 2 includes, it builds without errors:
#include <my_global.h>
#include <mysql.h>
Any suggestions on how to deal with the boost problems?
I don't think this is the same build problem as this one, "Trying to build websocket++ with MinGW: last few linker errors — what could it be?"
Concerning the first error, check if there are any macros interfering with the code. Right-click and go to definition or #define the macro yourself at the beginning of the file and see where it gets redefined. In really hard cases, look at the preprocessor output via a compiler flag.
Concerning the rest, you don't provide any versions for Boost and MySQL. Then, there is my_global.h (or is that part of MySQL?) and stdafx.h, which are both under your control but you don't show them here. Also, try to reduce the issue to the smallest possible piece of code. In short, provide a reproducible example.