Example/GLSL Program Link Error Testing

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Program Linking error checking.

GLuint program = glCreateProgram();

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

// Link the 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.

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