Sign in to follow this  
horizon981

OpenGL Linker Error.

Recommended Posts

horizon981    100
I'm using GLUT with Dev Cpp. I am having very strange problems. Although some programs work very well, others give me weird linker errors for same linker settings i.e. -lopengl32 -lglu32 -lglut32 Please help.

Share this post


Link to post
Share on other sites
horizon981    100
Well, here's the code:

//An animated square
#include <windows.h>
#include <gl\glut.h>
#define GL_PI 3.14159f

GLfloat xRot=2.0f,yRot=5.0f;
GLfloat windowWidth,windowHeight;

void RenderScene(void)
{
GLfloat x,y,z,angle;
glClear(GL_COLOR_BUFFER_BIT);

glPushMatrix();
glRotatef(xRot,1.0f,0.0f,0.0f);
glRotatef(yRot,0.0f,1.0f,0.0f);

glBegin(GL_POINTS);
z=-50.0f;

for(angle=0.0f;angle<=(2.0f*GL_PI)*3.0f;angle+=0.1f)
{
x=50.0f*sin(angle);
y=50.0f*cos(angle);
glVertex3f(x,y,z);
z+=0.5f;
}
glEnd();

glPopMatrix();
glFlush();
}

void SetupRC(void)
{
glClearColor(0.0f,1.0f,0.0f,1.0f);
glColor3f(0.0f,1.0f,0.0f);
}

void ChangeSize(GLsizei w, GLsizei h)
{
if(h==0)
h=1;

glViewport(0,0,w,h);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();

if(w<=h)
{
windowHeight = 250.0f*h/w;
windowWidth = 250.0f;
}
else
{
windowWidth = 250.0*w/h;
windowHeight = 250.0f;
}

glOrtho(0.0f,windowWidth,0.0f,windowHeight,1.0f,-1.0f);

glMatrixMode(GL_MODELVIEW);
glLoadIdentity();

}

int main(void)
{
glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
glutCreateWindow("Spring");
glutFullScreen();
glutDisplayFunc(RenderScene);
glutReshapeFunc(ChangeSize);

SetupRC();
glutMainLoop();
return 0;
}

AND THE ERRORS:
[Linker error] undefined reference to `glFinish@0'
[Linker error] undefined reference to `wglSwapBuffers@4'
[Linker error] undefined reference to `wglSwapBuffers@4'
[Linker error] undefined reference to `wglGetCurrentContext@0'
[Linker error] undefined reference to `wglGetCurrentDC@0'
etc.

I'm going nuts... plz help me.

Share this post


Link to post
Share on other sites
levjs    466
You need to link to opengl32.lib/glu32.lib/glaux.lib??


//Put at the top under your #include lines
#pragma comment( lib, "opengl32.lib" ) // Search For OpenGL32.lib While Linking
#pragma comment( lib, "glu32.lib" ) // Search For GLu32.lib While Linking
#pragma comment( lib, "glaux.lib" ) // Search For Glaux.lib While Linking



: ) Tell me if it works.

Levi

Share this post


Link to post
Share on other sites
Xeee    144
don't forget that for mingw(the compiler used by DevCpp), the order of libraries MATTERS!
I think that the correct order is glut then glu then opengl, so the command line will be: -lglut32 -lglu32 -lopengl32 , but I'm not sure, so if this didn't work try all the different possibilities :) (3! = 6... not much)

Share this post


Link to post
Share on other sites
purple_moon    122
Quote:
Original post by Xeee
don't forget that for mingw(the compiler used by DevCpp), the order of libraries MATTERS!
I think that the correct order is glut then glu then opengl, so the command line will be: -lglut32 -lglu32 -lopengl32 , but I'm not sure, so if this didn't work try all the different possibilities :) (3! = 6... not much)


Well, the order matters? I always use "gcc source.c -mwindows -lopengl32 -lglu32" (I haven't got into need of glut32 yet) to compile, and it works quite well.

Share this post


Link to post
Share on other sites
bpoint    464
Quote:
Original post by Xeee
yes, the order matter... I'm not sure what's the correct order, but I'm sure that the order matters, here's my proof

Uh, yes, but that's only important if the object files and libraries passed actually contain the same named functions (ie: weak symbols). None of the OpenGL, glu32, or glut32 libraries contain conflicting function names at all, so the order does not matter in this case.

To the OP: If you've setup Dev-C++ to link to those OpenGL libraries properly, then you shouldn't have any problems. I've never used Dev-C++, so I'm afraid I won't be of much help... :(

Also, I'm pretty sure #pragma comment(lib, ...) is Microsoft specific. Could be wrong, though.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Partner Spotlight

  • Similar Content

    • By pseudomarvin
      I assumed that if a shader is computationally expensive then the execution is just slower. But running the following GLSL FS instead just crashes
      void main() { float x = 0; float y = 0; int sum = 0; for (float x = 0; x < 10; x += 0.00005) { for (float y = 0; y < 10; y += 0.00005) { sum++; } } fragColor = vec4(1, 1, 1 , 1.0); } with unhandled exception in nvoglv32.dll. Are there any hard limits on the number of steps/time that a shader can take before it is shut down? I was thinking about implementing some time intensive computation in shaders where it would take on the order of seconds to compute a frame, is that possible? Thanks.
    • By Arulbabu Donbosco
      There are studios selling applications which is just copying any 3Dgraphic content and regenerating into another new window. especially for CAVE Virtual reality experience. so that the user opens REvite or CAD or any other 3D applications and opens a model. then when the user selects the rendered window the VR application copies the 3D model information from the OpenGL window. 
      I got the clue that the VR application replaces the windows opengl32.dll file. how this is possible ... how can we copy the 3d content from the current OpenGL window.
      anyone, please help me .. how to go further... to create an application like VR CAVE. 
       
      Thanks
    • By cebugdev
      hi all,

      i am trying to build an OpenGL 2D GUI system, (yeah yeah, i know i should not be re inventing the wheel, but this is for educational and some other purpose only),
      i have built GUI system before using 2D systems such as that of HTML/JS canvas, but in 2D system, i can directly match a mouse coordinates to the actual graphic coordinates with additional computation for screen size/ratio/scale ofcourse.
      now i want to port it to OpenGL, i know that to render a 2D object in OpenGL we specify coordiantes in Clip space or use the orthographic projection, now heres what i need help about.
      1. what is the right way of rendering the GUI? is it thru drawing in clip space or switching to ortho projection?
      2. from screen coordinates (top left is 0,0 nd bottom right is width height), how can i map the mouse coordinates to OpenGL 2D so that mouse events such as button click works? In consideration ofcourse to the current screen/size dimension.
      3. when let say if the screen size/dimension is different, how to handle this? in my previous javascript 2D engine using canvas, i just have my working coordinates and then just perform the bitblk or copying my working canvas to screen canvas and scale the mouse coordinates from there, in OpenGL how to work on a multiple screen sizes (more like an OpenGL ES question).
      lastly, if you guys know any books, resources, links or tutorials that handle or discuss this, i found one with marekknows opengl game engine website but its not free,
      Just let me know. Did not have any luck finding resource in google for writing our own OpenGL GUI framework.
      IF there are no any available online, just let me know, what things do i need to look into for OpenGL and i will study them one by one to make it work.
      thank you, and looking forward to positive replies.
    • By fllwr0491
      I have a few beginner questions about tesselation that I really have no clue.
      The opengl wiki doesn't seem to talk anything about the details.
       
      What is the relationship between TCS layout out and TES layout in?
      How does the tesselator know how control points are organized?
          e.g. If TES input requests triangles, but TCS can output N vertices.
             What happens in this case?
      In this article,
      http://www.informit.com/articles/article.aspx?p=2120983
      the isoline example TCS out=4, but TES in=isoline.
      And gl_TessCoord is only a single one.
      So which ones are the control points?
      How are tesselator building primitives?
    • By Orella
      I've been developing a 2D Engine using SFML + ImGui.
      Here you can see an image
      The editor is rendered using ImGui and the scene window is a sf::RenderTexture where I draw the GameObjects and then is converted to ImGui::Image to render it in the editor.
      Now I need to create a 3D Engine during this year in my Bachelor Degree but using SDL2 + ImGui and I want to recreate what I did with the 2D Engine. 
      I've managed to render the editor like I did in the 2D Engine using this example that comes with ImGui. 
      3D Editor preview
      But I don't know how to create an equivalent of sf::RenderTexture in SDL2, so I can draw the 3D scene there and convert it to ImGui::Image to show it in the editor.
      If you can provide code will be better. And if you want me to provide any specific code tell me.
      Thanks!
  • Popular Now