SPIRV-Cross/reference/shaders-hlsl/vert/no-input.vert

static float4 gl_Position;
struct SPIRV_Cross_Output
{
    float4 gl_Position : SV_Position;
};

void vert_main()
{
    gl_Position = 1.0f.xxxx;
}

SPIRV_Cross_Output main()
{
    vert_main();
    SPIRV_Cross_Output stage_output;
    stage_output.gl_Position = gl_Position;
    return stage_output;
}