Re: using autoconf to create build scripts for Assembly language programs

[mallapadi niranjan]

On Fri, Jun 8, 2018 at 1:06 PM, Basin Ilya <address@hidden> wrote:

> It might be late, but if you ever want to use /usr/bin/as, here's what you
> need to change:
>
> - In AM_INIT_AUTOMAKE add '-Wno-override' after '-Wall' to allow override
> Automake rules:
>
>     AM_INIT_AUTOMAKE([-Wall -Wno-override -Werror])
>
> - In Makefile.am add the custom rule:
>
>     .s.o:
>         $(AS) $(ASFLAGS) -o $@ $<
>
> - Don't use AM_CCASFLAGS.
>


Thanks that did help, but for linker it still uses gcc , can we override
that too to use /usr/bin/ld , ?

bin_PROGRAMS = hello
hello_SOURCES = hello.s
ASFLAGS = -gstabs+
hello_LDFLAGS=-nostdlib -lgcc -Wl,-e_start

.s.o:
        $(AS) $(ASFLAGS) -o $@ $<


output of make after the above changes:

<snip>
address@hidden foobar]$ make
make  all-am
make[1]: Entering directory
`/home/ashok/practice/ia32/myasm/autotools/foobar'
as -gstabs+  -o hello.o hello.s
gcc  -g -O2 -nostdlib -lgcc -Wl,-e_start  -o hello hello.o
make[1]: Leaving directory
`/home/ashok/practice/ia32/myasm/autotools/foobar'
</snip>



>
>
> On 07.06.2018 21:16, mallapadi niranjan wrote:
> > On Thu, Jun 7, 2018 at 10:03 PM, Eric Blake <address@hidden> wrote:
> >
> >> On 06/07/2018 11:23 AM, mallapadi niranjan wrote:
> >>
> >>> Thanks for the reply, that did help  a bit but  was not able to remove
> the
> >>>>
> >>> -c option
> >>>
> >>> I passed./configure CCAS=/usr/bin/as CFLAGS=''
> >>>
> >>>
> >>>   address@hidden foobar]$ make
> >>> make  all-am
> >>> make[1]: Entering directory
> >>> `/home/ashok/practice/ia32/myasm/autotools/foobar'
> >>> /usr/bin/as --gstabs+  -c -o hello.o hello.s
> >>>
> >>
> >> The automake documentation states that when you use AM_PROG_AS, your
> >> assembler MUST behave like a C compiler, in that it MUST accept -c and
> -o.
> >> If /usr/bin/as does not accept -c, then you'll have to provide a
> >> shell-script wrapper that adds that functionality on top of
> /usr/bin/as, at
> >> least according to the automake documentation.
> >>
> >> But again, the autoconf list is not the best list to be asking this;
> >> you'll (hopefully) get better response on the automake list, since it
> is an
> >> automake feature you are trying to use.
> >
> >
> > I was able to resolve it now using gcc itself instead of /usr/binas to
> > compile and link the assembler  using below method
> >
> > Makefile.am
> >
> > bin_PROGRAMS = hello
> > hello_SOURCES = hello.s
> > hello_LDFLAGS=-nostdlib -lgcc -Wl,-e_start
> >
> >
> >
> >
> >>
> >>
> >> --
> >> Eric Blake, Principal Software Engineer
> >> Red Hat, Inc.           +1-919-301-3266
> >> Virtualization:  qemu.org | libvirt.org
> >>
> > _______________________________________________
> > Autoconf mailing list
> > address@hidden
> > https://lists.gnu.org/mailman/listinfo/autoconf
> >
>