Example/GLSL Program Link Error Testing

Program Linking error checking.

GLuint program = glCreateProgram();

// Attach shaders as necessary.
glAttachShader(program, ...);
...

// Link the program.
glLinkProgram(program);

GLint isLinked = 0;
glGetProgramiv(program, GL_LINK_STATUS, &isLinked);
if (isLinked == GL_FALSE)
{
	GLint maxLength = 0;
	glGetProgramiv(program, GL_INFO_LOG_LENGTH, &maxLength);

	// The maxLength includes the NULL character
	std::vector<GLchar> infoLog(maxLength);
	glGetProgramInfoLog(program, maxLength, &maxLength, &infoLog[0]);

	// The program is useless now. So delete it.
	glDeleteProgram(program);

	// Provide the infolog in whatever manner you deem best.
	// Exit with failure.
	return;
}