An assembler listing is produced in the first and second pass of the assembler. This listing contains the assembler source code, as well as any errors found in either pass of the assembler. A symbol cross-reference is available. This file contains information for all symbols defined and referenced in an assembler source program. The assembler generates errors and warnings during the first and second pass.
Any error terminates the assembly process, and no object code is generated.
Warnings do not cause the assembly process to terminate, and the assembler still generates object code. The assembler always reports errors, but reports warnings only if the -w flag is used with the as command. Related Information AIX Assembler Overview . Features of the AIX Version 4 Assembler . Assembler Installation .