1### Compilation failed: 2 3error: 3: layout qualifier 'builtin' is not permitted here 4layout(builtin=15) in float4 sk_FragCoord; 5^^^^^^^^^^^^^^^^^^^^^ 6error: 3: symbol 'sk_FragCoord' was already defined 7layout(builtin=15) in float4 sk_FragCoord; 8^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 9error: 4: layout qualifier 'builtin' is not permitted here 10layout(builtin=17) in bool sk_Clockwise; // Similar to gl_FrontFacing, but defined in device space. 11^^^^^^^^^^^^^^^^^^^^^ 12error: 4: symbol 'sk_Clockwise' was already defined 13layout(builtin=17) in bool sk_Clockwise; // Similar to gl_FrontFacing, but defined in device space. 14^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 15error: 6: layout qualifier 'builtin' is not permitted here 16layout(location=0,index=0,builtin=10001) out half4 sk_FragColor; 17^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 18error: 6: symbol 'sk_FragColor' was already defined 19layout(location=0,index=0,builtin=10001) out half4 sk_FragColor; 20^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 21error: 7: layout qualifier 'builtin' is not permitted here 22layout(builtin=10008) half4 sk_LastFragColor; 23^^^^^^^^^^^^^^^^^^^^^ 24error: 7: symbol 'sk_LastFragColor' was already defined 25layout(builtin=10008) half4 sk_LastFragColor; 26^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 27error: 8: layout qualifier 'builtin' is not permitted here 28layout(builtin=10012) out half4 sk_SecondaryFragColor; 29^^^^^^^^^^^^^^^^^^^^^^^^^ 30error: 8: symbol 'sk_SecondaryFragColor' was already defined 31layout(builtin=10012) out half4 sk_SecondaryFragColor; 32^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 33error: 11: layout qualifier 'builtin' is not permitted here 34layout (builtin=123) in float mysteryIn; 35^^^^^^^^^^^^^^^^^^^^^^^ 36error: 12: layout qualifier 'builtin' is not permitted here 37layout (builtin=456) out float mysteryOut; 38^^^^^^^^^^^^^^^^^^^^^^^^ 39error: 13: layout qualifier 'builtin' is not permitted here 40layout (builtin=789) float mysteryGlobal; 41^^^^^^^^^^^^^^^^^^^^ 4213 errors 43