Question

I’m trying to compile my shader in OpenGLES 2.0:

/* Try compiling the shader. */
GL_CHECK(glCompileShader(*pShader));
GL_CHECK(glGetShaderiv(*pShader, GL_COMPILE_STATUS, &iStatus));

glGetShaderiv returns iStatus greater than 1 and when I try to get log info I get empty string:

if (iStatus > 1)
{
    GLsizei slen = 0;
    GLchar* compiler_log = (GLchar*)malloc(iStatus);
    glGetShaderInfoLog(*pShader, iStatus, &slen, compiler_log);
    cout <<"compiler_log:\n"<<compiler_log<<endl;
    free (compiler_log);
}

Shader:

attribute vec4 av4position;
attribute vec3 av3colour;
attribute vec2 av2texture;

uniform mat4 mvp;

varying vec3 vv3colour;
varying vec2 vv2texture;

void main() 
{
  // Pass the texture coordinate attribute to a varying.
  vv2texture = av2texture;
  // Pass the color value to a varying.
  vv3colour = av3colour;
  gl_Position = mvp * av4position;
}

Does anybody has any idea why?

Answer 1

glGetShaderiv didn’t return value greater than 1, it didn’t return anything (variable was not initialized).

The reason it didn’t return anything is that there were no packages installed:

libglapi-mesa
libgl1-mesa-glx
libgl1-mesa-dri

which are not available on Ubuntu 11.04, only on Ubuntu 11.10. So I wasn’t able to find solution for 11.04, I just upgraded to 11.10.