keil c51 multiple commands with command line compiling?

Your request is also not clear to me. Do you want to specify a command file for the C51 where all compiler directives including source file and object file is specified? If yes, you can invoke the C51 compiler with:

C51 @commandfile

as described in our manual on this page: https://developer.arm.com/documentation/101655/0961/Cx51-User-s-Guide/Compiling-Programs/Command-Prompt?lang=en

Our µVision IDE invokes the compiler the same way when building a project (see *.__i files when using the option 'Options for Target - Output - Create Batch File'). You could generate this command-file in a batch or make file if some options are dynamic.

Your request is also not clear to me. Do you want to specify a command file for the C51 where all compiler directives including source file and object file is specified? If yes, you can invoke the C51 compiler with:

C51 @commandfile

as described in our manual on this page: https://developer.arm.com/documentation/101655/0961/Cx51-User-s-Guide/Compiling-Programs/Command-Prompt?lang=en

Our µVision IDE invokes the compiler the same way when building a project (see *.__i files when using the option 'Options for Target - Output - Create Batch File'). You could generate this command-file in a batch or make file if some options are dynamic.