[Buildroot] kernel image size depends on toolchain?
Andreas.Kuehn at gin.de
Wed Jun 11 13:00:43 UTC 2008
Right from the .config file....
I suppose version 2.18 is the "old" version?
Meanwhile, I changed to version 22.214.171.124.1 and did a complete rebuild
with a well known result:
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 4528100 Bytes = 4421.97 kB = 4.32 MB
I don't know where that commit you mentioned has gone to (where does
that 1e621a8e3752367d4aae78a8ab00a18fb2793f34 belong to). Is it the
kernel tree or the binutils and finally which version?
Peter Korsgaard wrote:
>>>>>> "Andreas" == Andreas Kuehn <Andreas.Kuehn at gin.de> writes:
> Andreas> Here it comes...
> Andreas> old actual
> Andreas> -------------------------------------------------------------
> Andreas> linux/System.map 695909 695917
> Andreas> linux/vmlinux 27876137 27875949
> Andreas> linux/vmlinux.o 46429585 46507157
> Andreas> linux/arch/arm/boot/Image 2896464 3224138320
> So Image is around 3G. There afaik was a problem in arch/arm about
> some binutils versions creating huge images because of a new section.
> What binutils version are you using (old and new)?
> Ahh, this seems to be it:
> commit 1e621a8e3752367d4aae78a8ab00a18fb2793f34
> Author: Lennert Buytenhek <buytenh at wantstofly.org>
> Date: Fri Oct 12 14:38:54 2007 +0100
> [ARM] 4600/1: fix kernel build failure with build-id-supporting binutils
> Newer versions of binutils support --build-id, which adds an ELF
> note section called ".note.gnu.build-id" to the output. On the ARM
> kernel build, because there is no explicit mention of this section
> in the shipped ld script, this section is placed at vaddr 0x00000000
> (whereas the normal kernel text/data typically starts at vaddr
> 0xc0008000), causing the output of objcopy (Image) to produce a 3G+
> This patch makes objcopy strip the .note.gnu.build-id section from
> the Image file along with all other note sections, which fixes the
> Signed-off-by: Lennert Buytenhek <buytenh at wantstofly.org>
> Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
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