noMain.vert Shader version: 300 0:? Sequence 0:3 Function Definition: foo( ( global void) 0:3 Function Parameters: 0:? Linker Objects 0:? 'gl_VertexID' ( gl_VertexId highp int VertexId) 0:? 'gl_InstanceID' ( gl_InstanceId highp int InstanceId) mains.frag ERROR: 0:7: 'main' : function already has a body ERROR: 1 compilation errors. No code generated. Shader version: 300 ERROR: node is still EOpNull! 0:3 Function Definition: main( ( global void) 0:3 Function Parameters: 0:7 Function Definition: main( ( global void) 0:7 Function Parameters: 0:? Linker Objects Linked vertex stage: ERROR: Linking vertex stage: Missing entry point: Each stage requires one entry point Linked fragment stage: Shader version: 300 0:? Sequence 0:? Linker Objects 0:? 'gl_VertexID' ( gl_VertexId highp int VertexId) 0:? 'gl_InstanceID' ( gl_InstanceId highp int InstanceId) Shader version: 300 ERROR: node is still EOpNull! 0:3 Function Definition: main( ( global void) 0:3 Function Parameters: 0:7 Function Definition: main( ( global void) 0:7 Function Parameters: 0:? Linker Objects