#include <GLFW/glfw3.h>

int main(void)
{
    if (!glfwInit())
        return -1;

    GLFWwindow *window = glfwCreateWindow(800, 600, "OpenGL Resolution Test", NULL, NULL);
    if (!window)
    {
        glfwTerminate();
        return -1;
    }

    glfwMakeContextCurrent(window);

    while (!glfwWindowShouldClose(window))
    {
        glClearColor(0.5f, 0.69f, 1.0f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);

        glfwPollEvents();
        glfwSwapBuffers(window);
    }

    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}



Compiled with:
g++ main.cpp -o test `pkg-config --static --libs glfw3`