1*c8dee2aaSAndroid Build Coastguard Worker### Compilation failed: 2*c8dee2aaSAndroid Build Coastguard Worker 3*c8dee2aaSAndroid Build Coastguard Workererror: 3: 'main' must return: 'vec4', 'float4', or 'half4' 4*c8dee2aaSAndroid Build Coastguard Workervoid main() { 5*c8dee2aaSAndroid Build Coastguard Worker^^^^^^^^^^^ 6*c8dee2aaSAndroid Build Coastguard Workererror: 4: unknown identifier 'sk_FragColor' 7*c8dee2aaSAndroid Build Coastguard Worker sk_FragColor = half4(sk_Clockwise ? +1 : -1); 8*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 9*c8dee2aaSAndroid Build Coastguard Workererror: 4: unknown identifier 'sk_Clockwise' 10*c8dee2aaSAndroid Build Coastguard Worker sk_FragColor = half4(sk_Clockwise ? +1 : -1); 11*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 12*c8dee2aaSAndroid Build Coastguard Worker3 errors 13