Sandro Cavazzoni wrote:
> Hi to all,
> i'm writing an application based on opengl and i use GLSL for a custom 
> shader.
> 
> The application over mac osx compile and work correctly.
> On linux I installed MESA 7 on my ubuntu feisty.
> 
> When i try to compile it i've this error
> 
> /home/skaman/workspace/netvideo/bk-deps g++ -c -o netvideo_wx_av_box.o 
> -I/usr/include/ffmpeg   -I/usr/local/include//   -I./xpm/ 
> -D__STDC_CONSTANT_MACROS -I/usr/lib/wx/include/gtk2-unicode-debug-2.8 
> -I/usr/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES 
> -D__WXDEBUG__ -D__WXGTK__ -pthread  -g -O2 ./src/gui/elements/wx_av_box.cpp
> ./src/gui/elements/wx_av_box.cpp: In member function ‘void 
> wxAVBox::Render()’:
> ./src/gui/elements/wx_av_box.cpp:111: error: ‘glUseProgram’ was not 
> declared in this scope
> ./src/gui/elements/wx_av_box.cpp:113: error: ‘glGetUniformLocation’ 
> was not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:114: error: ‘glUniform1f’ was not 
> declared in this scope
> ./src/gui/elements/wx_av_box.cpp:119: error: ‘glUniform1i’ was not 
> declared in this scope
> ./src/gui/elements/wx_av_box.cpp: In member function ‘void 
> wxAVBox::InitGL()’:
> ./src/gui/elements/wx_av_box.cpp:245: error: ‘glCreateProgram’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:246: error: ‘glCreateShader’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:249: error: ‘glShaderSource’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:250: error: ‘glCompileShader’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:257: error: ‘glGetShaderiv’ was not 
> declared in this scope
> ./src/gui/elements/wx_av_box.cpp:260: error: ‘glGetShaderInfoLog’ 
> was not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:269: error: ‘glAttachShader’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:270: error: ‘glLinkProgram’ was not 
> declared in this scope
> ./src/gui/elements/wx_av_box.cpp:277: error: ‘glGetProgramiv’ was 
> not declared in this scope
> ./src/gui/elements/wx_av_box.cpp:280: error: ‘glGetProgramInfoLog’ 
> was not declared in this scope
> 
> In my source files i've included the header so:
> 
> #ifdef _APPLE_OPENGL_FRAMEWORK // it's defined only under OSX
> #include <OpenGL/gl.h>
> #include <OpenGL/glu.h>
> #else
> #include <GL/gl.h>
> #include <GL/glu.h>
> #endif
> 
> and on my system:
> 
> [EMAIL PROTECTED]:~/workspace/netvideo$ sudo find / | grep "GL\/gl\.h"
> /usr/local/include/GL/gl.h
> [EMAIL PROTECTED]:~/workspace/netvideo$ 
> 
> 
> Now, i wrong something... but what?

Prototypes for GL functions aren't enabled by default (to encourage 
using glXGetProcAddress).  To fix this, try defining 
GL_GLEXT_PROTOTYPES=1 either on the cmd line (-DGL_GLEXT_PROTOTYPES=1) 
or in your code (#define GL_GLEXT_PROTOTYPES 1) before including GL/gl.h

-Brian

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