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 if (unknownInput > 5) { sk_FragColor = half4(0.75); } else { discard; } 8*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 9*c8dee2aaSAndroid Build Coastguard Workererror: 4: discard statement is only permitted in fragment shaders 10*c8dee2aaSAndroid Build Coastguard Worker if (unknownInput > 5) { sk_FragColor = half4(0.75); } else { discard; } 11*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^ 12*c8dee2aaSAndroid Build Coastguard Workererror: 6: unknown identifier 'sk_FragColor' 13*c8dee2aaSAndroid Build Coastguard Worker while (i < 10) { sk_FragColor *= 0.5; i++; } 14*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 15*c8dee2aaSAndroid Build Coastguard Workererror: 7: unknown identifier 'sk_FragColor' 16*c8dee2aaSAndroid Build Coastguard Worker do { sk_FragColor += 0.25; } while (sk_FragColor.x < 0.75); 17*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 18*c8dee2aaSAndroid Build Coastguard Workererror: 7: unknown identifier 'sk_FragColor' 19*c8dee2aaSAndroid Build Coastguard Worker do { sk_FragColor += 0.25; } while (sk_FragColor.x < 0.75); 20*c8dee2aaSAndroid Build Coastguard Worker ^^^^^^^^^^^^ 21*c8dee2aaSAndroid Build Coastguard Worker6 errors 22