Messages in this thread |  | | Date | Sat, 24 Dec 2022 18:44:52 +0100 | From | Pali Rohár <> | Subject | Re: [PATCH v3] powerpc/boot: Don't always pass -mcpu=powerpc when building 32-bit uImage |
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On Thursday 08 December 2022 19:57:39 Christophe Leroy wrote: > Le 08/12/2022 à 20:16, Pali Rohár a écrit : > > On Sunday 28 August 2022 17:43:53 Christophe Leroy wrote: > >> Le 28/08/2022 à 19:41, Pali Rohár a écrit : > >>> On Sunday 28 August 2022 17:39:25 Christophe Leroy wrote: > >>>> Le 28/08/2022 à 19:33, Christophe Leroy a écrit : > >>>>> > >>>>> > >>>>> Le 28/08/2022 à 11:56, Pali Rohár a écrit : > >>>>>> When CONFIG_TARGET_CPU is specified then pass its value to the compiler > >>>>>> -mcpu option. This fixes following build error when building kernel with > >>>>>> powerpc e500 SPE capable cross compilers: > >>>>>> > >>>>>> BOOTAS arch/powerpc/boot/crt0.o > >>>>>> powerpc-linux-gnuspe-gcc: error: unrecognized argument in option > >>>>>> ‘-mcpu=powerpc’ > >>>>>> powerpc-linux-gnuspe-gcc: note: valid arguments to ‘-mcpu=’ are: > >>>>>> 8540 8548 native > >>>>>> make[1]: *** [arch/powerpc/boot/Makefile:231: > >>>>>> arch/powerpc/boot/crt0.o] Error 1 > >>>>> > >>>>> corenet64_smp_defconfig : > >>>>> > >>>>> BOOTAS arch/powerpc/boot/crt0.o > >>>>> powerpc64-linux-gcc: error: missing argument to '-mcpu=' > >>>>> make[1]: *** [arch/powerpc/boot/Makefile:237 : arch/powerpc/boot/crt0.o] > >>>>> Erreur 1 > >>>>> make: *** [arch/powerpc/Makefile:253 : uImage] Erreur 2 > >>>>> > >>>>> > >>>> > >>>> Seems like in fact, E5500_CPU and E6500_CPU are not taken into account > >>>> in CONFIG_TARGET_CPU, and get special treatment directly in > >>>> arch/powerpc/Makefile. > >>>> > >>>> This goes unnoticed because of CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += > >>>> $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) > >>>> > >>>> I think we need to fix that prior to your patch. > >>> > >>> It looks like that CONFIG_TARGET_CPU is broken. > >>> > >>> $ make ARCH=powerpc corenet64_smp_defconfig CROSS_COMPILE=powerpc64-linux-gnu- > >>> ... > >>> # configuration written to .config > >>> > >>> $ grep CONFIG_TARGET_CPU .config > >>> CONFIG_TARGET_CPU_BOOL=y > >>> > >>> CONFIG_TARGET_CPU_BOOL is set but CONFIG_TARGET_CPU not! > >> > >> Yes, because there is no default value for E5500_CPU and E6500_CPU. We > >> need to add one for each. > > > > With "[PATCH v1] powerpc/64: Set default CPU in Kconfig" patch from > > https://lore.kernel.org/linuxppc-dev/3fd60c2d8a28668a42b766b18362a526ef47e757.1670420281.git.christophe.leroy@csgroup.eu/ > > this change does not throw above compile error anymore. > > > That patch should land in powerpc/next soon. When it has landed, could > you resent this patch so that snowpatch checks the build again ?
Yes. But I'm still waiting because patch is not in powerpc/next yet.
> Because at the time being it is flagged as "failed", see > https://patchwork.ozlabs.org/project/linuxppc-dev/patch/20220828095659.4061-1-pali@kernel.org/ > > Christophe
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