glfw3 in ubuntu 19.04

원인은 모르겠는데.. 링크할때 파일명이랑 순서가 영향을 주네? 머지?

 

$ sudo apt-get install libglfw3-dev libglfw3

$ vi glfw.c

#include <GLFW/glfw3.h> #include  #include  static void error_callback(int error, const char* description) {     fputs(description, stderr); } static void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods) {     if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS)         glfwSetWindowShouldClose(window, GL_TRUE); } int main(void) {     GLFWwindow* window;     glfwSetErrorCallback(error_callback);     if (!glfwInit())         exit(EXIT_FAILURE);     window = glfwCreateWindow(640, 480, "Simple example", NULL, NULL);     if (!window)     {         glfwTerminate();         exit(EXIT_FAILURE);     }     glfwMakeContextCurrent(window);     glfwSetKeyCallback(window, key_callback);     while (!glfwWindowShouldClose(window))     {         float ratio;         int width, height;         glfwGetFramebufferSize(window, &width, &height);         ratio = width / (float) height;         glViewport(0, 0, width, height);         glClear(GL_COLOR_BUFFER_BIT);         glMatrixMode(GL_PROJECTION);         glLoadIdentity();         glOrtho(-ratio, ratio, -1.f, 1.f, 1.f, -1.f);         glMatrixMode(GL_MODELVIEW);         glLoadIdentity();         glRotatef((float) glfwGetTime() * 50.f, 0.f, 0.f, 1.f);         glBegin(GL_TRIANGLES);         glColor3f(1.f, 0.f, 0.f);         glVertex3f(-0.6f, -0.4f, 0.f);         glColor3f(0.f, 1.f, 0.f);         glVertex3f(0.6f, -0.4f, 0.f);         glColor3f(0.f, 0.f, 1.f);         glVertex3f(0.f, 0.6f, 0.f);         glEnd();         glfwSwapBuffers(window);         glfwPollEvents();     }     glfwDestroyWindow(window);     glfwTerminate();     exit(EXIT_SUCCESS); }

$ gcc glfw.c -lglfw -lGL

 

[링크 : https://www.glfw.org/docs/3.0/quick.html]