Compiling busybox to .s assembly file

[Denys Vlasenko]

On Wednesday 02 March 2011 05:24, Eric Schulte wrote:
> Denys Vlasenko <vda.linux at googlemail.com> writes:
> 
> > On Thursday 24 February 2011 18:17, Eric Schulte wrote:
> >> Hello,
> >> 
> >> I'm hoping to generate a compiled text asm file (gcc -S) of the busybox
> >> executable.  I've looked at scripts/showasm, but it uses objdump the
> >> output of which could not (easily) then be edited and linked to generate
> >> an executable.
> >> 
> >> I've spend a good deal of time mucking around in the Makefile, but
> >> having never fully felt comfortable with Makefiles even in relatively
> >> simple cases, the busybox Makefile is largely opaque to me.
> >> 
> >> If anyone can offer a suggestion, or point me in the right direction I
> >> will be very appreciative.  Once I get this working if there is any
> >> interest I would be happy to wrap it up in a script which could be
> >> included in scripts/ -- although I'm not sure that such functionality
> >> would be generally useful.
> >
> > Please see scripts/Makefile.IMA
> >
> > It may be a bit bit-rotted (because I don't use it, and people
> > who do use it send me updates far too infrequently), so you might
> > be forced to fix it up before it'll work for you...
> >
> > It runs entire compilation as one gcc invocation.
> >
> > I imagine adding the -S switch might be an easy-ich way
> > to generate one BIG .s file with the entire busybox
> > code.
> 
> Hi Denys,
> 
> This would be a very nice option, and while I'm currently able to tinker
> with the asm for a single applet it would be preferable to have the
> entire busybox program compiled to a single .s file.  I've tried playing
> with Makefile.IMA, and more generally with the "--combine" option to
> GCC, however I keep running into the same error, namely
> 
>   include/libbb.h:1670: error: conflicting types for ‘ptr_to_globals’

Can you send me the entire error message?

-- 
vda