Example/GLSL Program Link Error Testing

From OpenGL Wiki
Jump to: navigation, search

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.