Shader compilation issue with ARM GLES3.1 Emulator ver 2.2

I am working on GLES program using ARM GLES3.1 Emulator ver 2.2.

glShaderSource is giving 'GL_INVALID_OPERATION' error if shader is of following form

============================================

#ifndef GL_ES

#version 400 core

#define mediump

in vec3 position;

void main() {

    gl_Position = vec4(position, 1.0);

}

#else

attribute vec3 position;

void main() {

    gl_Position = vec4(position, 1.0);

}

#endif

=======================================================

On console it writes FATAL - GLES: <gles::GLES31Api::glShaderSource 126> Invalid version detected.

It seems it is due to line "#version 400 core", but I wonder why it should go to this line when GL_ES is defined.