GLAD link is not providing needed functions - c++

Question

TLDR: The GLAD header file won't let me use the openGL Commands and I don't know exactly why.
Here's a breakdown:
I'm on a Windows 10 Laptop.
I'm coding in C++.
I'm compiling with MinGW's g++ tool.
I'm using GLFW and GLAD.
My file layout is something like this:
OpenGLTest
include
glad
glad.h
GLFW
glfw3.h
glfw3native.h
KHR
khrplatform.h
glad.c
glfw3.dll
GraphicsTest.cpp(Main File)
libglfw3dll.a(I have forgotten what this does, it's a remnant from older attempts at openGL. Relevant?)
Makefile(a single command: "g++ GraphicsTest.cpp -g -L glad.c glfw3.dll")
As far as I can tell, the program will compile and run flawlessly if any and all commands from GLAD and openGL are commented out. All it then does is make a small window.
If said lines are not commented out, the compiler will throw a slew of errors, all following this form:
D:\Documents\Programming\C++\Programs\OpenGLTest/GraphicsTest.cpp:23: undefined reference to `gladLoadGL'
...with gladLoadGL being replaced with the relevant function.
The file itself reads thusly:
#include<iostream>
#include<glad\glad.h>
#include<GLFW\glfw3.h>
static void whatIsGoingOnSeriouslyGuysHelp(int id,const char* desc)
{
std::cout<<desc;
}
int main()
{
glfwSetErrorCallback(&whatIsGoingOnSeriouslyGuysHelp);
glfwInit();
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
GLFWwindow* window = glfwCreateWindow(100,100,"TEST",NULL,NULL);
if (window == NULL)
{
std::cout<<"Window Creation Error";
}
glfwMakeContextCurrent(window);
gladLoadGL();
//glViewport(0,0,100,100);
while (!glfwWindowShouldClose(window))
{
//std::cout<<"?";
glfwPollEvents();
glfwSwapBuffers(window);
//glClearColor(0.2f, 0.3f, 0.3f, 1.0f);
//glClear(GL_COLOR_BUFFER_BIT);
}
glfwDestroyWindow(window);
glfwTerminate();
return 0;
}
I have tried re-installing GLAD, but that didn't do anything. I haven't tried re-installing GLFW, but I don't think that's the problem.
Correct any misconceptions I have or errors I am making.

Answer 1

You need to include glad.c in your compile command as follows: (you had a -L before it which tells gcc to treat glad.c as a directory for libraries)
g++ GraphicsTest.cpp glad.c -g glfw3.dll
, and instead of gladLoadGL, you should use the GLFW loader:
if (!gladLoadGLLoader((GLADloadproc) glfwGetProcAddress)) {
std::cout << "Failed to initialize OpenGL context" << std::endl;
return -1;
}
Finally, you should invest a tiny bit of time into a decent build system because compiling every file every time will get real slow real fast. Here is the absolute minimal Makefile to get you started:
graphicstest: graphicstest.o glad.o
g++ -g -o $# $^ glfw3.dll