why does it not recognise include files and folders

Question

everytime i try to compile it to test it doesnt recongnise files

#include <GL\glew.h>
#include <GLFW/glfw3.h>

#ifdef _WIN32
#pragma comment(lib, "winmm.lib")
#endif // _WIN32

int main(void)
{
    GLFWwindow* window;

    /* Initialize the library */
    if (!glfwInit())
        return -1;

    /* Create a windowed mode window and its OpenGL context */
    window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL);

    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    /* Make the window's context current */
    glfwMakeContextCurrent(window);
    if(!glewInit())
      return -1;

    /* Loop until the user closes the window */
    while (!glfwWindowShouldClose(window))
    {
        /* Render here */
        glClear(GL_COLOR_BUFFER_BIT);

        /* Swap front and back buffers */
        glfwSwapBuffers(window);

        /* Poll for and process events */
        glfwPollEvents();
    }

    glfwTerminate();
    return 0;
}

What do you mean by "it doesnt recongnise files"? Are you getting any errors? — ForceBru, Jun 21 '20 at 17:25
yes i put the needed include filess and it doesnt recongnise it — Haicerikas, Jun 21 '20 at 17:28
Look into your pre-compiled headers directory if there is such a file. — sanitizedUser, Jun 21 '20 at 17:28
your question is poorly asked. You need to be more precise in what your asking — masonCherry, Jun 21 '20 at 17:53
well i try to compile the file so i can test glfw and then it gives me an error — Haicerikas, Jun 21 '20 at 17:56
What are you using to compile? how does your folder structure look. It's clear that you've not told the compiler where it can find the `glew` and `glfw` headers. — masonCherry, Jun 21 '20 at 18:01
mingw is not really a compiler. I'm assuming your using gcc. Did you passs arguments to gcc for the location of the includes for `glew` and `glfw` — masonCherry, Jun 21 '20 at 18:10
and i did not pass arguments to gcc for the location of the includes for glew and glfw because i don't know how to do it beceause my iq is like 90 — Haicerikas, Jun 21 '20 at 18:13
Where did you installed `glew` and `glfw`? And in what folder is your code? What is the command used to compile it? Does it tell mingw where to find those files? — Ripi2, Jun 21 '20 at 18:14
and i did not include flags because i don't know hot becausse again my iq is like 90 — Haicerikas, Jun 21 '20 at 18:14
i insstalled glfw and glfw in their websites and my code folder is Src and command is D:\\mingw\\mingw32\\bin\\g++.exe — Haicerikas, Jun 21 '20 at 18:16
Learn the difference of `#include ` and `#include "filename"` [here](https://stackoverflow.com/questions/21593/what-is-the-difference-between-include-filename-and-include-filename) Then think again where your files are. — Ripi2, Jun 21 '20 at 18:23

score 0 · Answer 1 · answered Jun 21 '20 at 20:58

When you are using a compiler you need to tell it the directory to find files that you include. In the line

#include <GL\glew.h>
#include <GLFW/glfw3.h>

This is telling the compiler to include the files glew.h and glfw3.h. The problem is how is the compiler supposed to know where those files are (it doesn't search your entire Drive for them. c++ compilers have a way for you to tell it where these files are relative to.

In gcc/g++ you use the -I flag and specify where this directory is.

specify the folders where you stored gl\glew.h and glfw\glfw3.hto the gcc using that -I option. If your files are store in C:\Users\John\Projects\dependencies\GLFW\include\glew\glew.h and C:\Users\John\Projects\dependencies\Glew\include\glfw\glfw3.h then use the the flags like so

gcc -IC:\Users\John\Projects\dependencies\GLFW\include
    -IC:\Users\John\Projects\dependencies\Glew\include main.c -o out_file

why does it not recognise include files and folders

1 Answers1