None.
Specifies a name for the output object, assembler, or executable file.
The default name for an executable file is a.out. The default name for an object or assembler source file is the same as the source file except that it has a .o or .s extension.
To choose the name for an object file, use this option in combination with the -c option. For an assembler source file, use it in combination with the -S option.
Except when you specify the -c or -S option, the -o option is passed directly to the ld command, instead of being processed by XL Fortran.
xlf95 t.f # Produces "a.out"
xlf95 -c t.f # Produces "t.o"
xlf95 -o test_program t.f # Produces "test_program"
xlf95 -S -o t2.s t.f # Produces "t2.s"