ld option --build-id=none

ld option --build-id=none

[Manoel Rebelo Abranches]

In the file conf/powerpc-ieee1275.rmk I need in newer ld versions to
have:

kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
	-Wl,-N,-S,-Ttext,0x200000,-Bstatic,--build-id=none


and in older versions:

kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
-Wl,-N,-S,-Ttext,0x200000,-Bstatic

Should I move it from conf/powerpc-ieee1275.rmk to the configure script?
-- 
Best Regards,

Manoel Abranches <mrabran@linux.vnet.ibm.com>
IBM Linux Technology Center Brazil

Re: ld option --build-id=none

[Robert Millan]

On Fri, Nov 28, 2008 at 01:21:43PM -0200, Manoel Rebelo Abranches wrote:
> In the file conf/powerpc-ieee1275.rmk I need in newer ld versions to
> have:
> 
> kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
> 	-Wl,-N,-S,-Ttext,0x200000,-Bstatic,--build-id=none
> 
> 
> and in older versions:
> 
> kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
> -Wl,-N,-S,-Ttext,0x200000,-Bstatic
> 
> Should I move it from conf/powerpc-ieee1275.rmk to the configure script?

I thought it was there already (or something similar):

aclocal.m4:[AC_MSG_CHECKING([whether linker accepts --build-id=none])

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

Re: ld option --build-id=none

[Manoel Rebelo Abranches]

But it is only passed in modules compilation. I need it when creating
kernel.elf as well.

On Fri, 2008-11-28 at 20:59 +0100, Robert Millan wrote:
> On Fri, Nov 28, 2008 at 01:21:43PM -0200, Manoel Rebelo Abranches wrote:
> > In the file conf/powerpc-ieee1275.rmk I need in newer ld versions to
> > have:
> > 
> > kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
> > 	-Wl,-N,-S,-Ttext,0x200000,-Bstatic,--build-id=none
> > 
> > 
> > and in older versions:
> > 
> > kernel_elf_LDFLAGS = $(COMMON_LDFLAGS) -static-libgcc -lgcc \
> > -Wl,-N,-S,-Ttext,0x200000,-Bstatic
> > 
> > Should I move it from conf/powerpc-ieee1275.rmk to the configure script?
> 
> I thought it was there already (or something similar):
> 
> aclocal.m4:[AC_MSG_CHECKING([whether linker accepts --build-id=none])
> 
-- 
Best Regards,

Manoel Abranches <mrabran@linux.vnet.ibm.com>
IBM Linux Technology Center Brazil

Re: ld option --build-id=none

[Robert Millan]

On Fri, Nov 28, 2008 at 06:11:12PM -0200, Manoel Rebelo Abranches wrote:
> But it is only passed in modules compilation. I need it when creating
> kernel.elf as well.

I assume we want this for every *_elf target?  Then we shouldn't be restricting
it to modules (perhaps this comes from the assumption that only modules use
ELF, which is true on i386-pc)

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

Re: ld option --build-id=none

[Manoel Rebelo Abranches]

Its not necessary when creating the .o object files, only when linking
then to create the final kern.elf.
That is done changing the variable  kernel_elf_LDFLAGS in
conf/powerpc-ieee1275.rmk.

but I dont know how to use the grub_cv_prog_ld_build_id_none variable in
aclocal.m4 to change kernelelf_LDFLAGS in the conf/powerpc-ieee1275.rm
file.

Thanks in advance for the help.
On Fri, 2008-11-28 at 21:17 +0100, Robert Millan wrote:
> On Fri, Nov 28, 2008 at 06:11:12PM -0200, Manoel Rebelo Abranches wrote:
> > But it is only passed in modules compilation. I need it when creating
> > kernel.elf as well.
> 
> I assume we want this for every *_elf target?  Then we shouldn't be restricting
> it to modules (perhaps this comes from the assumption that only modules use
> ELF, which is true on i386-pc)
> 
-- 
Best Regards,

Manoel Abranches <mrabran@linux.vnet.ibm.com>
IBM Linux Technology Center Brazil

Re: ld option --build-id=none

[Robert Millan]

On Fri, Nov 28, 2008 at 06:30:22PM -0200, Manoel Rebelo Abranches wrote:
> Its not necessary when creating the .o object files, only when linking
> then to create the final kern.elf.
> That is done changing the variable  kernel_elf_LDFLAGS in
> conf/powerpc-ieee1275.rmk.
> 
> but I dont know how to use the grub_cv_prog_ld_build_id_none variable in
> aclocal.m4 to change kernelelf_LDFLAGS in the conf/powerpc-ieee1275.rm
> file.

Look in genmk.rb.  The "class Image" stanza adds a "-R .note.gnu.build-id"
to objcopy, which gets rid of the build-id for *.img files on i386-pc.

For ELF images, I think you need something similar in "class Program".

-- 
Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."