OpenGL not reporting shader compiler errors - c++

Question

I'm having trouble getting OpenGL to work properly. It fails on all shaders and simply returns an info log with the length of 0.
To see if it was in fact OpenGL, I created a little piece of code to test it:
GLuint s = glCreateShader(GL_VERTEX_SHADER);
const char *src = "bad\nsource\ncode";
glShaderSource(s, 1, &src, 0);
GLint len;
glGetShaderiv(s, GL_INFO_LOG_LENGTH, &len);
std::vector<char> buffer(len+1);
glGetShaderInfoLog(s, len, 0, buffer.data());
buffer[len] = '\0';
std::cout << len << std::endl;
std::cout << buffer.data() << std::endl;
And when ran, it simply prints 0 to the console.
What's happening?

Answer 1

You need to compile your shader in order to get an errorlog.
Pseudo Code:
glCompileShader(shader);
GLint status;
glGetShaderiv(shader, GL_COMPILE_STATUS, &status);
if(status == GL_FALSE) {
GLint infolog_length;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &infolog_length);
GLchar[] infolog = new GLchar[infolog_length+1];
glGetShaderInfoLog(shader, infolog_length, null, infolog.ptr);
// print infolog etc.
}
From The Documentation:
glGetShaderInfoLog returns the information log for the specified shader object. The information log for a shader object is modified when the shader is compiled. The string that is returned will be null terminated.