feat: include glew on linux

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.27)
-project(HelloOpenGL)
+project(HelloGLEW)
 
 # Define platform-specific paths and libraries
 if(WIN32)
@@ -8,11 +8,17 @@ if(WIN32)
     include_directories(${GLFW_PATH}/include)
     link_directories(${GLFW_PATH}/lib-vc2022)
 
+    # GLEW
+    set(GLEW_PATH "C:/libs/glew-2.2.0")
+    include_directories(${GLEW_PATH}/include)
+    link_directories(${GLEW_PATH}/lib)
+
     # OpenGL
     find_package(OpenGL REQUIRED)
 elseif(UNIX)
     find_package(PkgConfig REQUIRED)
     pkg_search_module(GLFW REQUIRED glfw3)
+    find_package(GLEW REQUIRED)
     find_package(OpenGL REQUIRED)
 elseif(APPLE)
     message(FATAL_ERROR "Linux and macOS platforms are not supported yet.")
@@ -22,9 +28,12 @@ add_executable(${PROJECT_NAME} hello.cpp)
 
 if(WIN32)
     target_link_libraries(${PROJECT_NAME} glfw3)
+    target_link_libraries(${PROJECT_NAME} glew)
+    target_include_directories(${PROJECT_NAME} PRIVATE ${GLEW_INCLUDE_DIRS})
     target_link_libraries(${PROJECT_NAME} OpenGL::GL)
 elseif(UNIX)
     include_directories(${GLFW_INCLUDE_DIRS})
     target_link_libraries(${PROJECT_NAME} ${GLFW_LIBRARIES})
+    target_link_libraries(${PROJECT_NAME} GLEW::GLEW)
     target_link_libraries(${PROJECT_NAME} OpenGL::GL)
 endif()

hello.cpp

@@ -24,15 +24,18 @@
 // To compile on Arch Linux
 //
 // Install dependencies
-// sudo pacman -S glfw mesa
+// sudo pacman -S glfw mesa glew
 //
 // Build
 // cmake ..
 // cmake --build .
 
+#include <GL/glew.h>
 #include <GLFW/glfw3.h>
 #include <GL/gl.h>
 
+#include <iostream>
+
 int main()
 {
     if (!glfwInit())
@@ -47,6 +50,13 @@ int main()
 
     glfwMakeContextCurrent(window);
 
+    glewExperimental = GL_TRUE;
+    if (glewInit() != GLEW_OK)
+    {
+        std::cerr << "Failed to initialize GLEW" << std::endl;
+        return -1;
+    }
+
     while (!glfwWindowShouldClose(window))
     {
         glClearColor(1.0f, 0.0f, 0.0f, 1.0f);