Я только начал изучать программирование openGL с openGL Superbible.К сожалению, я не могу собрать ни одного примера.Я нахожусь на Ubuntu 18.10, и я подготовил среду разработки с этими пакетами из официального репозитория:
В книге используется небольшая структура сточка входа в заголовке sb7.h (в исходном коде книги), sb7.h затем указывает на glfw3 и gl3w (последний указан с исходным кодом книги, поэтому вам не нужно его загружать).
Это первый пример из книги:
#ifndef _LINUX
#define _LINUX
#endif
// Include the "sb7.h" header file
#include "sb7.h"
// Derive my_application from sb7::application
class my_application : public sb7::application
{
public:
// Our rendering function
void render(double currentTime)
{
// Simply clear the window with red
static const GLfloat red[] = { 1.0f, 0.0f, 0.0f, 1.0f };
glClearBufferfv(GL_COLOR, 0, red);
}
};
// Our one and only instance of DECLARE_MAIN
DECLARE_MAIN(my_application);
Если я пытаюсь скомпилировать его (файл называется 'main.cpp') с g++ main.cpp -lglfw
Я получаю эту ошибку:
/usr/bin/ld: /tmp/ccDOdloQ.o: in function `sb7::application::run(sb7::application*)':
main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x27e): undefined reference to `gl3wInit'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x29f): undefined reference to `gl3wIsSupported'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2af): undefined reference to `gl3wDebugMessageCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2bd): undefined reference to `sb7::application::debug_callback(unsigned int, unsigned int, unsigned int, unsigned int, int, char const*, void*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2c9): undefined reference to `gl3wEnable'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2de): undefined reference to `sb6IsExtensionSupported(char const*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2ee): undefined reference to `gl3wDebugMessageCallbackARB'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2fc): undefined reference to `sb7::application::debug_callback(unsigned int, unsigned int, unsigned int, unsigned int, int, char const*, void*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x308): undefined reference to `gl3wEnable'
/usr/bin/ld: /tmp/ccDOdloQ.o: in function `sb7::application::glfw_onResize(GLFWwindow*, int, int)':
main.cpp:(.text._ZN3sb711application13glfw_onResizeEP10GLFWwindowii[_ZN3sb711application13glfw_onResizeEP10GLFWwindowii]+0x15): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application13glfw_onResizeEP10GLFWwindowii[_ZN3sb711application13glfw_onResizeEP10GLFWwindowii]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: /tmp/ccDOdloQ.o: in function `sb7::application::glfw_onKey(GLFWwindow*, int, int, int, int)':
main.cpp:(.text._ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii[_ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii[_ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii]+0x23): undefined reference to `sb7::application::app'
/usr/bin/ld: /tmp/ccDOdloQ.o: in function `sb7::application::glfw_onMouseButton(GLFWwindow*, int, int, int)':
main.cpp:(.text._ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii[_ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii]+0x18): undefined reference to `sb7::application::app'
/usr/bin/ld: /tmp/ccDOdloQ.o:main.cpp:(.text._ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii[_ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii]+0x1f): more undefined references to `sb7::application::app' follow
/usr/bin/ld: /tmp/ccDOdloQ.o: in function `my_application::render(double)':
main.cpp:(.text._ZN14my_application6renderEd[_ZN14my_application6renderEd]+0x14): undefined reference to `gl3wClearBufferfv'
collect2: error: ld returned 1 exit status
Читая сообщения, я подумал, что что-то не так с библиотекой gl3w, поэтому я скачал ее из репозитория github *1023* и поместил его и glcorearb.h в /usr/include/GL/
, указывая1025 * в sb7.h к этой папке.В конце концов я скомпилировал gl3w.c и связал его с main.cpp с помощью g ++, как написано здесь:
g++ -c gl3w.c
g++ -c main.cpp
g++ gl3w.o main.o
но когда я выполняю 3) я получаю другие ошибки:
/usr/bin/ld: gl3w.o: in function `open_libgl()':
gl3w.c:(.text+0x16): undefined reference to `dlopen'
/usr/bin/ld: gl3w.c:(.text+0x4d): undefined reference to `dlsym'
/usr/bin/ld: gl3w.o: in function `close_libgl()':
gl3w.c:(.text+0x6f): undefined reference to `dlclose'
/usr/bin/ld: gl3w.o: in function `get_proc(char const*)':
gl3w.c:(.text+0xc5): undefined reference to `dlsym'
/usr/bin/ld: main.o: in function `sb7::application::run(sb7::application*)':
main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x21): undefined reference to `glfwInit'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x7c): undefined reference to `glfwWindowHint'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x92): undefined reference to `glfwWindowHint'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0xb3): undefined reference to `glfwWindowHint'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0xd4): undefined reference to `glfwWindowHint'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0xe3): undefined reference to `glfwWindowHint'
/usr/bin/ld: main.o:main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0xf2): more undefined references to `glfwWindowHint' follow
/usr/bin/ld: main.o: in function `sb7::application::run(sb7::application*)':
main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x13f): undefined reference to `glfwGetPrimaryMonitor'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x172): undefined reference to `glfwCreateWindow'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x1c8): undefined reference to `glfwMakeContextCurrent'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x1e2): undefined reference to `glfwSetWindowSizeCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x1fc): undefined reference to `glfwSetKeyCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x216): undefined reference to `glfwSetMouseButtonCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x230): undefined reference to `glfwSetCursorPosCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x24a): undefined reference to `glfwSetScrollCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x279): undefined reference to `glfwSetInputMode'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2af): undefined reference to `gl3wDebugMessageCallback'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2bd): undefined reference to `sb7::application::debug_callback(unsigned int, unsigned int, unsigned int, unsigned int, int, char const*, void*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2c9): undefined reference to `gl3wEnable'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2de): undefined reference to `sb6IsExtensionSupported(char const*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2ee): undefined reference to `gl3wDebugMessageCallbackARB'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x2fc): undefined reference to `sb7::application::debug_callback(unsigned int, unsigned int, unsigned int, unsigned int, int, char const*, void*)'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x308): undefined reference to `gl3wEnable'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x339): undefined reference to `glfwGetTime'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x355): undefined reference to `glfwSwapBuffers'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x35a): undefined reference to `glfwPollEvents'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x372): undefined reference to `glfwGetKey'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x39b): undefined reference to `glfwWindowShouldClose'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x3e7): undefined reference to `glfwDestroyWindow'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application3runEPS0_[_ZN3sb711application3runEPS0_]+0x3ec): undefined reference to `glfwTerminate'
/usr/bin/ld: main.o: in function `sb7::application::glfw_onResize(GLFWwindow*, int, int)':
main.cpp:(.text._ZN3sb711application13glfw_onResizeEP10GLFWwindowii[_ZN3sb711application13glfw_onResizeEP10GLFWwindowii]+0x15): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application13glfw_onResizeEP10GLFWwindowii[_ZN3sb711application13glfw_onResizeEP10GLFWwindowii]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: main.o: in function `sb7::application::glfw_onKey(GLFWwindow*, int, int, int, int)':
main.cpp:(.text._ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii[_ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii]+0x1c): undefined reference to `sb7::application::app'
/usr/bin/ld: main.cpp:(.text._ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii[_ZN3sb711application10glfw_onKeyEP10GLFWwindowiiii]+0x23): undefined reference to `sb7::application::app'
/usr/bin/ld: main.o: in function `sb7::application::glfw_onMouseButton(GLFWwindow*, int, int, int)':
main.cpp:(.text._ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii[_ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii]+0x18): undefined reference to `sb7::application::app'
/usr/bin/ld: main.o:main.cpp:(.text._ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii[_ZN3sb711application18glfw_onMouseButtonEP10GLFWwindowiii]+0x1f): more undefined references to `sb7::application::app' follow
/usr/bin/ld: main.o: in function `my_application::render(double)':
main.cpp:(.text._ZN14my_application6renderEd[_ZN14my_application6renderEd]+0x14): undefined reference to `gl3wClearBufferfv'
collect2: error: ld returned 1 exit status
В этот момент я попытался с версией одного файла gl3w.h, который ужевключает gl3w.c.Я поместил два заголовка в /usr/include/GL/
, а затем указал sb7.h на эту версию библиотеки, но другие ошибки появились с g++ main.cpp -lglfw
:
In file included from main.cpp:6:
sb7.h: In member function ‘virtual void sb7::application::run(sb7::application*)’:
sb7.h:137:9: error: ‘gl3wInit’ was not declared in this scope
gl3wInit();
^~~~~~~~
sb7.h:137:9: note: suggested alternative: ‘glfwInit’
gl3wInit();
^~~~~~~~
glfwInit
sb7.h:147:17: error: ‘gl3wIsSupported’ was not declared in this scope
if (gl3wIsSupported(4, 3))
^~~~~~~~~~~~~~~
sb7.h:147:17: note: suggested alternative: ‘gl3w_is_supported’
if (gl3wIsSupported(4, 3))
^~~~~~~~~~~~~~~
gl3w_is_supported
Я также добавил #define GL3W_IMPLEMENTATION
до #include "GL/gl3w.h"
как предложено в документации к одиночной файловой версии gl3w, но безуспешно.Я получаю те же ошибки с исходными кодами другой книги.
Надеюсь, что кто-то может мне помочь.Спасибо.