Test/link.redeclareBuiltin.vert - third_party/glslang - Git at Google

 #version 410

 out gl_PerVertex
 {
     vec4 gl_Position;
 };

 void main()
 {
     gl_Position = vec4(1.0);
 }
	#version 410

	out gl_PerVertex
	{
	vec4 gl_Position;
	};

	void main()
	{
	gl_Position = vec4(1.0);
	}