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Re: "Decompressor is too big" building i386-pc image on Cygwin


From: Andrey Borzenkov
Subject: Re: "Decompressor is too big" building i386-pc image on Cygwin
Date: Tue, 24 Dec 2013 11:38:59 +0400

On Mon, Dec 23, 2013 at 6:00 PM, Vladimir 'φ-coder/phcoder' Serbinenko
<address@hidden> wrote:
> On 23.12.2013 13:42, Andrey Borzenkov wrote:
>> address@hidden ~/grub-2.02~beta1
>> $ ./grub-mkimage -d grub-core -O i386-pc -o grub.img
>> ./grub-mkimage: error: Decompressor is too big.
>>
>> address@hidden ~/grub-2.02~beta1
>> $ ls -l grub-core/*_decompress.img
>> -rwxr-xr-x 1 bor None 3604 Dec 23 15:53 grub-core/lzma_decompress.img
>>
>> address@hidden ~/grub-2.02~beta1
>> $
>>
>> Well, 3604 is indeed more than size it checks (0x9000 - 0x8200 ==
>> 3584). As I definitely can use beta1 on Linux for the same platform,
>> it looks like Cygwin related?
>>
>
> It has a .rdata section with following contents:
> Contents of section .rdata:
>  9000 4743433a 2028474e 55292034 2e382e32  GCC: (GNU) 4.8.2
>  9010 00000000
> We'll need to find an option to inhibit this

Adding -Qn to TARGET_CFLAGS fixes it.

Small downside is, compiler used to generate files is no more present
in *.image and *.modules. May be we could stuff it in modinfo.sh to
facilitate debugging.



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