[PATCH] [POWERPC] Fix bootwrapper builds with newer gcc versions

[Kumar Gala]

On May 2, 2008, at 7:13 AM, Josh Boyer wrote:

> On Fri, 2008-05-02 at 03:11 -0500, Kumar Gala wrote:
>> GCC 4.4.x looks to be adding support for generating out-of-line  
>> register
>> saves/restores based on:
>>
>> http://gcc.gnu.org/ml/gcc-patches/2008-04/msg01678.html
>>
>> This breaks the bootwrapper as we'd need to link with libgcc to get  
>> the
>> implementation of the register save/restores.
>
> We don't link with libgcc anywhere in the kernel.  Is this going to  
> have
> similar impacts for building the vmlinux itself?

Not by default.  The issue only shows up with -Os.  Not sure if we can  
build the kernel that way.

> What are they actually error messages you see with that version of  
> GCC,
> out of curiosity?


   CC      fs/qnx4/qnx4.mod.o
arch/powerpc/boot/cuboot-85xx.o: In function `setprop':
/home/galak/git/linux-2.6/arch/powerpc/boot/ops.h:114: undefined  
reference to `_restgpr_30_x'
arch/powerpc/boot/cuboot-85xx.o: In function `platform_init':
/home/galak/git/linux-2.6/arch/powerpc/boot/cuboot-85xx.c:60:  
undefined reference to `_restgpr_25_x'
arch/powerpc/boot/cuboot-85xx.o: In function `find_node_by_devtype':
/home/galak/git/linux-2.6/arch/powerpc/boot/ops.h:163: undefined  
reference to `_restgpr_29_x'
arch/powerpc/boot/cuboot-85xx.o: In function `platform_fixups':
/home/galak/git/linux-2.6/arch/powerpc/boot/cuboot-85xx.c:51:  
undefined reference to `_restgpr_25_x'
   CC      fs/sysv/sysv.mod.o
arch/powerpc/boot/wrapper.a(main.o): In function `setprop':
/home/galak/git/linux-2.6/arch/powerpc/boot/ops.h:114: undefined  
reference to `_restgpr_30_x'
arch/powerpc/boot/wrapper.a(main.o): In function `start':
/home/galak/git/linux-2.6/arch/powerpc/boot/main.c:207: undefined  
reference to `_restgpr_24_x'
arch/powerpc/boot/wrapper.a(libfdt-wrapper.o): In function `fdt_init':
/home/galak/git/linux-2.6/arch/powerpc/boot/libfdt-wrapper.c:193:  
undefined reference to `_restgpr_30_x'

...

/home/galak/git/linux-2.6/arch/powerpc/boot/libfdt/fdt_wip.c:132:  
undefined reference to `_restgpr_26_x'
arch/powerpc/boot/wrapper.a(fdt_wip.o): In function `fdt_nop_node':
/home/galak/git/linux-2.6/arch/powerpc/boot/libfdt/fdt_wip.c:144:  
undefined reference to `_restgpr_28_x'
arch/powerpc/boot/wrapper.a(fdt_wip.o): In function  
`fdt_setprop_inplace':
/home/galak/git/linux-2.6/arch/powerpc/boot/libfdt/fdt_wip.c:73:  
undefined reference to `_restgpr_29_x'
make[1]: *** [arch/powerpc/boot/cuImage.mpc8560ads] Error 1
   CC      lib/libcrc32c.mod.o
   CC      net/key/af_key.mod.o

- k