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.
Related
When I try to build test sources I get an error like after this.
stl_tree.h:542:14: error: ‘__node’ does not name a type
::new(__node) _Rb_tree_node<_Val>;
Executor's content.
#include <CppUTest/TestHarness.h>
#include <CppUTest/CommandLineTestRunner.h>
#include <CppUTest/UtestMacros.h>
#include <CppUTestExt/MockSupport.h>
int main(int argc, char** argv) {
MemoryLeakWarningPlugin::turnOffNewDeleteOverloads();
return CommandLineTestRunner::RunAllTests(argc, argv);
}
My test' s source code starts with below includes.
#include <CppUTest/TestHarness.h>
#include <CppUTest/CommandLineTestRunner.h>
#include <CppUTest/UtestMacros.h>
#include <CppUTestExt/MockSupport.h>
#include <iostream>
#include "common/data_util_astro_cfg.h"
TEST_GROUP(ASTRO_UTIL_TEST) {
void setup() { }
void teardown() { }
};
And the "common/data_util_astro_cfg.h" file has following includes.
#include "../data/data_type_file.h"
#include <json/json.h>
static AstroConfigs toAstroConfigs(std::string content)
My problem is I get compilation error with these includes, when I remove line json.h include everything is fine I can get binary output.
I think the problem is about new operator' s conflict. The solution is offered by Cpputest side and it is located on http://cpputest.github.io/manual.html#memory_leak_detection. But it isn't clear somehow. :(
The question has been already defined on Compilation error after including <map>. It is so similar to mine but the problem has solved with creating new project. In that case I have no option for that. I'm using Yocto project and the project has created with auto generation tools as well.
Can you help me on this? (Thank you for your time.)
Unfortunately, I solved the problem after a while. It seems something wrong with CPPUTest. At the top of the test file, I have several includes. Some of them belong to CPPUTest library, some of them are mine. My includes are following CPPUTest that's why I’m getting an error. If I changed their places, it would be working correctly. It seems meaningless, but it is the correct solution. ”PROBLEM SHOULD BE RESOLVED WITH DEFINE CPPUTEST LIBRARIES AT THE BOTTOM OF YOUR INCLUDE LIST.”
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).
So, I have this question. Why does cout throws
error C2065: 'cout' : undeclared identifier
I am using Visual Studio 2012 as an IDE and I am writing a school project. I have everything done except an example file. So I am trying to write something on the screen like this:
#include "iostream"
#include "stdafx.h"
using namespace std;
int main()
{
cout<<"example";
return 0;
}
So the problem is with cout... printf works fine, but I want to use cout.
EDIT:
I've changed "" to <> but it is not helping. Also I am using this code only for example... This is not the whole project.
stdafx.h shall be the first include directive in your source file.
Switch files and convert the second include to <>, as other suggested.
#include "stdafx.h"
#include <iostream>
See this post for more information.
First of all:
#include <iostream>
instead of #include "iostream"
Secondly, it is generally considered bad practice to write using namespace std;, even though most courses start with that. It is better to only use what you actually need, in your case:
using std::cout;
#include "iostream"
should be
#include <iostream>
Quoting from this post:difference-between-iostream-and-iostream-quotes-in-include
By courtesy of #Jerry Coffin's answer:
When you use < >, the compiler only looks in the system-designated directory/directories (e.g., whatever you've set in the include environment variable) for the header.
When you use " ", the compiler looks in the local directory first, and if that fails, re-searches just like you'd used < >. Technically, (i.e., according to the standard) that doesn't have to be the "local" directory, but that's how it works in essentially every compiler of which I'm aware).
EDIT:
However, the root cause is that stdafx.h is a precompiled header. Visual C++ will not compile anything before the #include "stdafx.h" in the source file, unless the compile option /Yu'stdafx.h' is unchecked (by default); it assumes all code in the source up to and including that line is already compiled. However, it is still better to use <> with iostream not to confuse reader of the code.
If you use #include <iostream> with the <> instead of "" then it should work. Right now, the compiler doesn't know where to find the iostream library.
Also, you might want to change cout<<"example"; to cout<<"example"<<endl; for a new line so that it formats correctly.
Came across this issue while trying to build a Dynamic Linked Library. Make sure that instead of the #include stdafx.h you specify the following include on the first line of your .cpp file:
#include "pch.h"
This should also be the case for VS2017 or earlier.
This error also occurred in the Visual Studio 2017 IDE. Moving stdafx.h to the top solved the error.
For more on stdafx.h, see What's the use for "stdafx.h" in Visual Studio?
I'm working on an OpenGL program to test out shaders and trying to compile them. However, the call to glCreateShader() (and other shader calls like glDeleteShader) give the following error:
(this error is from glCreateShader())
Error 3 error LNK2001: unresolved external symbol _pglCreateShader
I'm using Visual Studio 2012 and on windows 7. Got one of the latest nvidia cards including the latest drivers so can't be my OpenGL version.
I'm using the glTools header files for all the helper functions for the OpenGL Superbible 4th edition. Not sure if there is an error in using these files?
I'll post my includes in case this could be of any help as well.
#pragma once
#include <Windows.h>
// Basic C++ includes
#include <stdio.h>
#include <tchar.h>
#include <iostream>
#include <string>
#include <sstream>
#include <fstream>
#include <vector>
using namespace std;
// OpenGL specific and GUI includes
#include "shared/gltools.h"
#include "shared/math3d.h"
#include <SOIL.h>
And linker options:
soil.lib;opengl32.lib;gltools.lib;
Oké, the problem has been solved thanks to the answers:
I edited my glTools.h to include 'gl/glew.h' instead of "glee.h", added a ;glew32.lib option to my linker and added glewInit() before entering the main loop. I've also added the GLEW libs,dlls and includes into the appropriate folder and all the functions work like they should! :)
Grab a copy of GLEW to handle extension loading.
Doing it by hand is...annoying.
On Windows, you use WGL, and when using WGL you can't just link against the GL functions directly. All the functions you get are these; you're supposed to dynamically grab the pointer to the GL entry point you want with wglGetProcAddress (as in here) before you can use them.
Basically, OpenGL on Windows is a PITA if you do the GL entrypoint function pointer loading manually. It's much easier to use a utility library to grab the pointers for you, such as GLEW.
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.