nasm installato correttamente.

I sorgenti in assembly (.s) creati con gcc però non li compila...

es. errori:
codice:
prova2.s:1: error: attempt to define a local label before any non-local labels
prova2.s:3: error: parser: instruction expected
...
prova2.s:9: error: symbol `pushl' redefined
prova2.s:9: error: parser: instruction expected
prova2.s:10: error: parser: instruction expected
prova2.s:12: error: label or instruction expected at start of line
prova2.s:13: error: parser: instruction expected
prova2.s:14: error: symbol `movl' redefined
prova2.s:14: error: parser: instruction expected
prova2.s:16: error: symbol `movl' redefined
prova2.s:16: error: parser: instruction expected
...
prova2.s:19: error: symbol `popl' redefined
prova2.s:19: error: parser: instruction expected
...
prova2.s:30: error: symbol `movl' redefined
prova2.s:30: error: parser: instruction expected
ma un file .s o .asm creato secondo gli insegnamenti del libro postato, nasm lo compilerebbe sotto mac os x?