Re: [Qemu-devel] [PATCH v3] Add optionrom compatible with fw_cfg DMA version

[Gerd Hoffmann]

On Di, 2016-01-26 at 12:20 +0100, Marc Marí wrote:
> On Tue, 26 Jan 2016 11:11:54 +0000
> Stefan Hajnoczi <address@hidden> wrote:
> 
> > On Mon, Jan 25, 2016 at 02:17:48PM +0100, Marc Marí wrote:
> > > +linuxboot_dma.img: linuxboot_dma.o
> > > + $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -m elf_i386
> > > -Ttext 0 -e _start -s -o $@ $<,"  Building $(TARGET_DIR)$@") +
> > >  %.img: %.o
> > >   $(call quiet-command,$(LD) $(LDFLAGS_NOPIE) -Ttext 0 -e
> > > _start -s -o $@ $<,"  Building $(TARGET_DIR)$@")  
> > 
> > Why is -m elf_i386 necessary for linuxboot_dma.img but not for the
> > other *.img files?
> 
> I cannot give a precise explanation. But if I don't force an output
> type, I get this error:
> 
> Building optionrom/linuxboot_dma.img
> ld: i386 architecture of input file `linuxboot_dma.o' is incompatible
> with i386:x86-64 output

Any chance the linker needs -m32 too?

cheers,
  Gerd