Re: [Tack-devel] Assembler and linker

[Sorav B. <sb...@ii...>]

Thanks a lot George for this detailed information --- this is very
helpful.   Yes I was able to link multiple object files using the
instructions in your note.

One more question:  I see that the ACK compiler supports optimization
levels O0-O6.  Which of these levels do what transformations?  Does ACK
support inter-procedural optimizations?  Any documentation you would like
to point towards for this type of information?

Sorav

On Thu, Oct 27, 2022 at 11:41 PM George Koehler <ke...@gm...> wrote:

> On Thu, 27 Oct 2022 18:21:09 +0530
> Sorav Bansal via Tack-devel <tac...@li...> wrote:
>
> > I understand that one can use the "-c" and "-c.s" options to generate the
> > object and assembly files respectively.  Also, as far as I can tell, the
> > formats of these object and assembly files are custom formats that are
> not
> > parseable by any third-party tool.  So I assume that the repository
> > provides tools to link multiple object files and to assemble a .s file?
> >
> > Which tool can I use to link multiple .o files generated by "ack -c ..."?
> >
> > Which tool can I use to assemble a .s file generated by "ack -c.s ..."?
>
> Run "ack" again to link or assemble those files.  You might need
> "ack -.c" or "ack -.m2" to link the C or Modula-2 library.
>
> # Assemble prog2.s and link it with the C library.
> ack -mosxppc -c.s prog2.c
> ack -mosxppc -.c -o prog2 prog2.s
>
> # Link part1.o and part2.o with the C library.
> ack -mosxppc -c part1.c
> ack -mosxppc -c part2.c
> ack -mosxppc -.c -o prog3 part1.o part2.o
>
> If you run "ack -v -v", you can see the commands for the assembler
> and the linker:
>
> $ ack -v -v -mosxppc -.c -o prog2 prog2.s
> /home/kernigh/kernigh/park/ack-build/staging/lib/ack/osxppc/as - -o
> prog2.o prog2.s
> /home/kernigh/kernigh/park/ack-build/staging/lib/ack/em_led -a0:4 -a1:4
> -a2:4096 -a3:4 -b0:0x129c
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/boot.o
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/c-ansi.o -o
> /tmp/Ack_bdcba.out prog2.o
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/libc.a
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/libem.a
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/libsys.a
> /home/kernigh/kernigh/park/ack-build/staging/share/ack/osxppc/libend.a
> /home/kernigh/kernigh/park/ack-build/staging/lib/ack/cvmach -m18
> /tmp/Ack_bdcba.out prog2
>
> Most targets link objects with em_led, then run a 2nd tool like cvmach
> to convert the executable from ack.out format.  ack passes some magic
> numbers "-b0:0x129c" and libraries "libsys.a" to em_led.
>
> --George
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