None.
Generates an assembler language file for each source file.
When this option is specified, the compiler produces the assembler source files as output instead of an object or an executable file.
The generated assembler files do not include all the data that is included in a .o file by -qipa or -g.
xlf95 -O3 -qhot -S test.f # Produces test.s
The option can be used to specify a name for the resulting assembler source file.
For information about the assembler-language format, see the AIX® Assembler Language Reference.