GLFW/glfw3.h: No such file or directory

Code
1

I am trying to learn glfw and opengl but I got the error that i mentioned on the title that is no such file or directory.

cmake:
cmake_minimum_required(VERSION 3.30.3)
project(cpp)
add_executable(cpp main.cpp)
target_include_directories(cpp PRIVATE dependencies)

cpp
#include <iostream>
#include <GLFW/glfw3.h>
using namespace std;
int main(){
    GLFWwindow* window;
    while (!glfwInit){
        cout << "hello";
    }
    window = glfwCreateWindow(800, 400, "hello", NULL, NULL);
    return 0;
}

cpp/
│
├── .vscode/
│   ├── launch.json
│   ├── tasks.json
│
├── build/
│   ├── CMakeFiles/
│   ├── cmake_install.cmake
│   ├── CMakeCache.txt
│   ├── compile_commands.json
│
├── Makefile
│
├── dependencies/
│   ├── GLFW/
│       ├── glfw3.h
│       ├── glfw3native.h
│
├── CMakeLists.txt
├── main.cpp
└── main.exe
2

Looking at what you have here, I’d say that GLFW headers should have been discovered, so I got curious and tried to reproduce your problem, but I could not (with CMake 3.29.2). The project of course fails on linking, because you are missing linking to GLFW binary, but I did not get your error about the header.

So it is probably something environmental, such as you are on a case-sensitive filesystem, and your GLFW headers folder is actually named glfw.

If you want, I could try to reproduce it with your exact project files, so if you’d be interested in that, share an archive or repository here.

3

this is the link to my project! Have a llok at it to see the details. I am bad at explaining.

4

Okay, I tried to reproduce the headers problem with the project from your repository, but it’s the same as the one that I tried to re-create based on your original description, so I did not get that error still.

Just in case, here are the commands that I executed:

$ git clone git@github.com:DPthang411/OpenglLearning.git
$ cd ./OpenglLearning/
$ git switch master
$ cd ./build/
$ rm -r ./*; rm -r .cmake; ls -lah
$ cmake -G Ninja -DCMAKE_BUILD_TYPE=Release ..
$ cmake --build .

and that resulted in:

[2/2] Linking CXX executable cpp
FAILED: cpp
Undefined symbols for architecture arm64:
  "_glfwCreateWindow", referenced from:
      _main in main.cpp.o
ld: symbol(s) not found for architecture arm64

Like I already said, the linking error is expected, because you don’t link to GLFW in your project. But why you get the headers error - that I don’t understand. The only difference I can immediately see between our environments is that I’m on Mac OS and you seem to be on Windows (with MSYS/MinGW?), although that shouldn’t matter.

Just in case, I tried on Windows too, but got the same result:

main.cpp.obj : error LNK2019: unresolved external symbol glfwCreateWindow referenced in function main
cpp.exe : fatal error LNK1120: 1 unresolved externals

No error about headers.

5

wdym by i didnt libk it? i linked it using cmake?

6

I don’t see a single target_link_libraries() in your project.
So then what do you mean by “i linked it”? Can you show the exact line/fragment which you think does the linking in your project?