illumos gate

Assembler wrapper (aw) begins dispatching -D and -U options only after encountering the -P option:

 734                 case 'D':
 735                 case 'U':
 736                         if (cpp)
 737                                 newae(cpp, arg);
 738                         else if (m4)
 739                                 newae(m4, arg);
 740                         else
 741                                 newae(as, arg);
 742                         break;

With this approach such commands do not work:

aw -Ui386 -P -D_ASM ...

This is unexpected. Assembler wrapper should look for the -P option first, and then start parsing command line from the beginning.