Added runtime side trace buffer, handled in a separate thread, limited to 1MB, and dropped after 3 seconds if not used by IDE. GetTraceVariables is not anymore blocking on next PLC cycle
<xsd:attribute name="Compiler" type="xsd:string" use="optional" default="gcc"/>
<xsd:attribute name="CFLAGS" type="xsd:string" use="required"/>
<xsd:attribute name="Linker" type="xsd:string" use="optional" default="gcc"/>
<xsd:attribute name="LDFLAGS" type="xsd:string" use="required"/>