Bug#823526: linux: FTBFS on powerpcspe due to the use of unsupported instructions
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> On 05 May 2016, at 18:59, John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> wrote:
>
> Source: linux
> Version: 4.5.2-1
> Severity: normal
> User: debian-powerpc@lists.debian.org
> Usertags: powerpcspe
>
> Hi!
>
> linux currently fails to build from source on powerpcspe since the compiler
> is using FPU instructions which are not available on the e500v2 CPUs [1,2]:
>
> {standard input}: Assembler messages:
> {standard input}:2227: Error: unrecognized opcode: `ldarx'
> {standard input}:2274: Error: unrecognized opcode: `stdcx.'
> /<<PKGBUILDDIR>>/scripts/Makefile.build:263: recipe for target 'arch/powerpc/lib/sstep.o' failed
> make[6]: *** [arch/powerpc/lib/sstep.o] Error 1
> /<<PKGBUILDDIR>>/Makefile:954: recipe for target 'arch/powerpc/lib' failed
> make[5]: *** [arch/powerpc/lib] Error 2
> make[5]: *** Waiting for unfinished jobs....
>
> Looking at arch/powerpc/lib/sstep.c, there are actually #ifdefs for the CONFIG_PPC_FPU,
> however, it seems there is no way of manually setting CONFIG_PPC_FPU in the kernel
> configuration. I assume, this is done by choosing a certain type of PowerPC hardware.
>
> In any case, version 3.16.7 still builds fine [3], so this is a regression either
> way. Although we currently have to use a custom kernel for our e500v2 boards
> anyway, it's still desirable to fix any build issues with the kernel package
> on powerpcspe.
>
> Cheers,
> Adrian
>
>> [1] https://buildd.debian.org/status/fetch.php?pkg=linux&arch=powerpcspe&ver=4.5.2-1&stamp=1462426562
>> [2] http://www.nxp.com/files/32bit/doc/ref_manual/E500CORERM.pdf
>> [3] https://buildd.debian.org/status/fetch.php?pkg=linux&arch=powerpcspe&ver=3.16.7-ckt9-3&stamp=1458056490
>
> --
> .''`. John Paul Adrian Glaubitz
> : :' : Debian Developer - glaubitz@debian.org
> `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
> `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
>
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