Re: Build regressions/improvements in v4.4-rc8

[Guenter Roeck]

On 01/04/2016 07:04 AM, Geert Uytterhoeven wrote:
> On Mon, Jan 4, 2016 at 4:01 PM, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> > JFYI, when comparing v4.4-rc8[1] to v4.4-rc7[3], the summaries are:
> >    - build errors: +19/-18
>
>    + /home/kisskb/slave/src/arch/arm/kernel/ftrace.c: error: implicit
> declaration of function 'flush_tlb_all'
> [-Werror=implicit-function-declaration]:  => 93:2
>    + /home/kisskb/slave/src/arch/arm/kernel/patch.c: error:
> 'L_PTE_DIRTY' undeclared (first use in this function):  => 39:2
>    + /home/kisskb/slave/src/arch/arm/kernel/patch.c: error:
> 'L_PTE_MT_WRITEBACK' undeclared (first use in this function):  => 39:2
>    + /home/kisskb/slave/src/arch/arm/kernel/patch.c: error:
> 'L_PTE_PRESENT' undeclared (first use in this function):  => 39:2
>    + /home/kisskb/slave/src/arch/arm/kernel/patch.c: error: 'L_PTE_XN'
> undeclared (first use in this function):  => 39:2
>    + /home/kisskb/slave/src/arch/arm/kernel/patch.c: error:
> 'L_PTE_YOUNG' undeclared (first use in this function):  => 39:2
>
> arm-randconfig
> Seen and report before
>
>    + /tmp/cc5DX198.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 43
>    + /tmp/ccHnSrdb.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 49, 366
>    + /tmp/ccSLqWGf.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 43
>    + /tmp/cch44bTJ.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 378, 49
>    + /tmp/ccjj7cLa.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 43
>    + /tmp/ccsgtMo8.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 41, 403
>    + /tmp/ccxItlIa.s: Error: can't resolve `_start' {*UND* section} -
> `L0^A' {.text section}:  => 43
>
> Various mips.
> Seems like the fix for this fix still doesn't fix everything?

Yes, there are more binutils problems. The current kernel code does not correctly
detect binutils versions such as 2.24.90, where the third level version number
is >= 10. See the discussion in [1], and the fix from James Hogan in [2].


If I find the time, I'll extend my test scripts to run some mips builds
with different binutils versions.

Guenter

---
[1] https://patchwork.linux-mips.org/patch/11929/
[2] https://patchwork.linux-mips.org/patch/11931/

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