OpenGL shaders in Windows

Graphics and GPU Programming Programming OpenGL

Started by Mariusz Pilipczuk January 14, 2013 05:31 PM

15 comments, last by Mariusz Pilipczuk 11 years, 3 months ago

Mariusz Pilipczuk

174

Author

January 14, 2013 05:31 PM

Hello,

I was recently trying to compile my game engine on Windows, but I ran into a serious problem. I am using SDL and OpenGL, and I link with the following options:

-lmingw32 -lSDLmain -lSDL -lopengl32 -lglu32

I use the Code::Blocks IDE. When I compile the engine, I get the following errors:


obj\Debug\specfx\specfx.o||In function `meCreateEffect':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|61|undefined reference to `glCreateProgram@0'|
obj\Debug\specfx\specfx.o||In function `meAttachShaderFromMemory':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|97|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|98|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|99|undefined reference to `glShaderSource@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|100|undefined reference to `glCompileShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|102|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|106|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|108|undefined reference to `glGetShaderInfoLog@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|122|undefined reference to `glAttachShader@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|138|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|140|undefined reference to `glShaderSource@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|141|undefined reference to `glCompileShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|143|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|147|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|149|undefined reference to `glGetShaderInfoLog@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|162|undefined reference to `glAttachShader@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|172|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|174|undefined reference to `glShaderSource@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|175|undefined reference to `glCompileShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|177|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|181|undefined reference to `glGetShaderiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|183|undefined reference to `glGetShaderInfoLog@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|196|undefined reference to `glAttachShader@8'|
obj\Debug\specfx\specfx.o||In function `meLinkShaders':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|210|undefined reference to `glLinkProgram@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|212|undefined reference to `glGetProgramiv@12'|
obj\Debug\specfx\specfx.o||In function `meApplyEffect':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|228|undefined reference to `glUseProgram@4'|
obj\Debug\specfx\specfx.o||In function `meDeleteEffect':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\specfx\specfx.c|266|undefined reference to `glDeleteProgram@4'|
obj\Debug\video\shader.o||In function `me_init_shader':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|69|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|70|undefined reference to `glShaderSource@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|71|undefined reference to `glCompileShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|73|undefined reference to `glCreateShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|74|undefined reference to `glShaderSource@16'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|75|undefined reference to `glCompileShader@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|77|undefined reference to `glCreateProgram@0'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|78|undefined reference to `glAttachShader@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|79|undefined reference to `glAttachShader@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|80|undefined reference to `glLinkProgram@4'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|81|undefined reference to `glUseProgram@4'|
obj\Debug\video\shader.o||In function `meSaveShaderInfoLog':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|101|undefined reference to `glGetProgramiv@12'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|105|undefined reference to `glGetProgramInfoLog@16'|
obj\Debug\video\shader.o||In function `me_shader_variablei':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|126|undefined reference to `glGetUniformLocation@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|127|undefined reference to `glUniform1i@8'|
obj\Debug\video\shader.o||In function `me_shader_variabled':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|140|undefined reference to `glGetUniformLocation@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|141|undefined reference to `glUniform1d'|
obj\Debug\video\shader.o||In function `me_shader_variablef':|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|154|undefined reference to `glGetUniformLocation@8'|
C:\Age of Prisoners stuff\Madd Engine (ME)\me-1.0.0\video\shader.c|155|undefined reference to `glUniform1f@8'|
||=== Build finished: 46 errors, 0 warnings ===|

Which looks like the shader API is not there :(.

Has anyone ran into this problem? Do you know how to solve it?

All help is appreciated.

21st Century Moose

13,459

January 14, 2013 05:58 PM

Have a read here: http://www.opengl.org/wiki/Getting_Started#Getting_Functions

Direct3D has need of instancing, but we do not. We have plenty of glVertexAttrib calls.

Mariusz Pilipczuk

174

Author

January 14, 2013 07:14 PM

But this appears to be a linker error. Am I supposed to link with another library? If so, what library is it? Also, I believe SDL loads the functions for me, and even if it didn't, it wouldn't be a LINKER error, just a runtime error.

Geometrian

1,813

January 14, 2013 07:20 PM

If you're using GL 2 headers, which you most likely are, you need to load shaders, fbos, etc. as extensions.

It is recommended to do this with a library. GLEW and GLEE are the two major ones.

-G

[size="1"]And a Unix user said rm -rf *.* and all was null and void...|There's no place like 127.0.0.1|The Application "Programmer" has unexpectedly quit. An error of type A.M. has occurred.
[size="2"]

Mariusz Pilipczuk

174

Author

January 14, 2013 07:32 PM

Is it still OK if I use SDL though? Because SDL does all the initialising for me, and on Linux it was enough to get the shaders working. And if it's possible, can anyone give na example?

Brother Bob

10,350

January 14, 2013 08:15 PM

Of course you can still use SDL. The two libraries mentioned above do not compete with SDL and can perfectly well be used together.

Daaark

3,556

January 14, 2013 08:44 PM

Is it still OK if I use SDL though? Because SDL does all the initialising for me, and on Linux it was enough to get the shaders working. And if it's possible, can anyone give na example?

It doesn't work the same on Linux.

The OpenGL library that ships with Windows is OpenGL 1.1. All the newer functionality is provided by the driver for your GPU and supplied by the IHV. So you need to supply yourself with a newer version of GL.H, and manually create function pointers to anything newer than 1.1. That's what GLEW or GLEE are for.

Twitter :: DeviantArt

kop0113

2,466

January 15, 2013 11:44 AM

Does -lglu32 not need to go before -lopengl32?

I remember running into something like this but it might have been with glut.

Also try linking -lglew32 (before -lopengl32 and -lglu32). Glew can be a little tricky to compile up in mingw, but it is possible.

http://tinyurl.com/shewonyay - Thanks so much for those who voted on my GF's Competition Cosplay Entry for Cosplayzine. She won! I owe you all beers :)

Mutiny - Open-source C++ Unity re-implementation.
Defile of Eden 2 - FreeBSD and OpenBSD binaries of our latest game.

Mariusz Pilipczuk

174

Author

January 15, 2013 04:08 PM

is GLEW built-in on Windows, or do I need to get some kind of DLL and headers from somewhere?

wintertime

4,154

January 15, 2013 04:11 PM

You need to get it yourself.

OpenGL shaders in Windows

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

OpenGL shaders in Windows

This topic is closed to new replies.

Popular Topics

Recommended Tutorials

Reticulating splines