[U-Boot] [RFC PATCH] fix compilation issue in arm cortex a8

[U-Boot] [RFC PATCH] fix compilation issue in arm cortex a8

[Michael Trimarchi]

Hi,

this patch fix the compilation issue. Step to reproduce:

add CONFIG_YAFFS2 in overo defconfig and compile u-boot

Regards
Michael


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[U-Boot] [RFC PATCH] fix compilation issue in arm cortex a8

[Tom]

Michael Trimarchi wrote:
> Hi,
> 
> this patch fix the compilation issue. Step to reproduce:
> 
> add CONFIG_YAFFS2 in overo defconfig and compile u-boot
> 
> Regards
> Michael
> 
> 

This is not an OMAP specific problem.
This problem will happen on all ARM platforms.

It would be better to understand why these unwind calls are being made and
to just not do them.

As this is an eabi problem.
Adding

void *__exidx_start;
void *__exidx_end;

To eabi_compat.c also "fixes" the link problem.
This may be a better place for the change than all the linker scripts

In general cases where libgcc is problem, you can build with

USE_PRIVATE_LIBGCC=yes

Trying this unfortunately has another link problem

fs/yaffs2/libyaffs2.a(yaffscfg.o): In function `yaffs_StartUp':
	fs/yaffs2/yaffscfg.c:185: undefined reference to `__aeabi_uldivmod'

This function could be added to lib_arm/_udivsi3.S or a new file if you
feel it is appropriate.

Tom

[U-Boot] [RFC PATCH] fix compilation issue in arm cortex a8

[Michael Trimarchi]

Tom wrote:
> Michael Trimarchi wrote:
>> Hi,
>>
>> this patch fix the compilation issue. Step to reproduce:
>>
>> add CONFIG_YAFFS2 in overo defconfig and compile u-boot
>>
>> Regards
>> Michael
>>
>>
>
> This is not an OMAP specific problem.
> This problem will happen on all ARM platforms.
>
> It would be better to understand why these unwind calls are being made 
> and
> to just not do them.
>
> As this is an eabi problem.
> Adding
>
> void *__exidx_start;
> void *__exidx_end;
>
> To eabi_compat.c also "fixes" the link problem.
> This may be a better place for the change than all the linker scripts
>
> In general cases where libgcc is problem, you can build with
>
> USE_PRIVATE_LIBGCC=yes
>
> Trying this unfortunately has another link problem
>
> fs/yaffs2/libyaffs2.a(yaffscfg.o): In function `yaffs_StartUp':
>     fs/yaffs2/yaffscfg.c:185: undefined reference to `__aeabi_uldivmod'
>
> This function could be added to lib_arm/_udivsi3.S or a new file if you
> feel it is appropriate.
>
Ok,
I'm going to provide a better patch.
> Tom
>
Best regards
Michael Trimarchi
>
>
>
>

[U-Boot] [RFC PATCH] fix compilation issue in arm cortex a8

[Michael Trimarchi]

Tom wrote:
> Michael Trimarchi wrote:
>> Hi,
>>
>> this patch fix the compilation issue. Step to reproduce:
>>
>> add CONFIG_YAFFS2 in overo defconfig and compile u-boot
>>
>> Regards
>> Michael
>>
>>
>
> This is not an OMAP specific problem.
> This problem will happen on all ARM platforms.
>
> It would be better to understand why these unwind calls are being made 
> and
> to just not do them.
>
> As this is an eabi problem.
> Adding
>
> void *__exidx_start;
> void *__exidx_end;
>
> To eabi_compat.c also "fixes" the link problem.
> This may be a better place for the change than all the linker scripts
>
> In general cases where libgcc is problem, you can build with
>
> USE_PRIVATE_LIBGCC=yes
>
> Trying this unfortunately has another link problem
>
> fs/yaffs2/libyaffs2.a(yaffscfg.o): In function `yaffs_StartUp':
>     fs/yaffs2/yaffscfg.c:185: undefined reference to `__aeabi_uldivmod'
>
> This function could be added to lib_arm/_udivsi3.S or a new file if you
> feel it is appropriate.
The problem is only releated to yaffs2 so I propose to use the do_div in 
that code
when the division is releated to mtd->size / <some> and add the two 
function in eabi file

Michael

>
> Tom
>
>
>
>
>