file-spec,... One or more VSI C source files separated by plus signs or commas. If plus signs are used, the input files are concatenated into a single object file. If commas are used, each file is compiled separately to create separate object files. If no input file extension is specified, VSI C assumes the .C default file extension. library-file-spec A text library containing #include modules referenced in one or more of the source files. A library file specification must be concatenated with a file specification with a plus sign and qualified using the /LIBRARY qualifier. If the input file extension is not specified, VSI C assumes the .TLB default file extension.