-S

Description

Generates an assembler language file (.s) for each source file. The resulting .s files can be assembled to produce object .o files or an executable file (a.out).

Syntax

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Notes

You can invoke the assembler with the xlc++ command. For example,

xlc++ myprogram.s

will invoke the assembler, and if successful, the loader to create an executable file, a.out.

If you specify -S with -E or -P, -E or -P takes precedence. Order of precedence holds regardless of the order in which they were specified on the command line.

You can use the -o option to specify the name of the file produced only if no more than one source file is supplied. For example, the following is not valid:

xlc++ myprogram1.C myprogram2.C -o -S

Restrictions

The generated assembler files do not include all the data that is included in a .o file by the -g or -qipa options.

Examples

  1. To compile myprogram.C to produce an assembler language file myprogram.s, enter:
    xlc++ myprogram.C -S
  2. To assemble this program to produce an object file myprogram.o, enter:
    xlc++ myprogram.s -c
  3. To compile myprogram.C to produce an assembler language file asmprogram.s, enter:
    xlc++ myprogram.C -S -o asmprogram.s

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