On Mon, 2015-08-31 at 14:44 +0800, Boqun Feng wrote: > Hi all, > > I hit a strange build error on v4.2, when I try to build a LE kernel > with a slightly modification of the ppc64_defconfig. What I did is just > make ppc64_defconfig and make menuconfig to set CPU_LITTLE_ENDIAN=y, and > then build the kernel. > > I did a little research myself, and found out the error is because of > trying to build a LE kernel with CONFIG_PPC_PS3=y. So a simple way to > reproduce is:
First, LE isn't supported on PS/3 :-) It's only supported on POWER8 machines (and *some* P7 machines and only when running as KVM guest). But the specific problem you are having looks like a differnet issue with the PS3 boot wrapper. Cheers, Ben > . > 1. make menuconfig > > set CONFIG_CPU_LITTLE_ENDIAN=y > > set CONFIG_PPC_PS3=y > > (I will also attach the .config in the email) > 2. make > > will see make errors like: > > CALL arch/powerpc/relocs_check.sh > WARNING: 1 bad relocations > c000000000c8c778 R_PPC64_ADDR64 __crc_TOC. > DTC arch/powerpc/boot/ps3.dtb > WRAP arch/powerpc/boot/dtbImage.ps3 > ld: powerpc:common64 architecture of input file > `arch/powerpc/boot/ps3-head.o' is incompatible with powerpc:common output > ld: powerpc:common64 architecture of input file > `arch/powerpc/boot/ps3-hvcall.o' is incompatible with powerpc:common output > ld: powerpc:common64 architecture of input file `arch/powerpc/boot/ps3.o' > is incompatible with powerpc:common output > ... > arch/powerpc/boot/wrapper.a(crt0.o): In function `p_toc': > (.text+0x30): undefined reference to `__toc_start' > arch/powerpc/boot/wrapper.a(crt0.o): In function `p_dyn': > (.text+0x38): undefined reference to `__dynamic_start' > arch/powerpc/boot/wrapper.a(crt0.o): In function `p_rela': > (.text+0x40): undefined reference to `__rela_dyn_start' > make[1]: *** [arch/powerpc/boot/dtbImage.ps3] Error 1 > rm arch/powerpc/boot/ps3.dtb > make: *** [zImage] Error 2 > > > Does this error occur because little endian is not supported on PS3? > If so, should we do something like: > > config PPC_PS3 > > bool "Sony PS3" > -> > depends on PPC64 && PPC_BOOK3S > +> > depends on PPC64 && PPC_BOOK3S && CPU_BIG_ENDIAN > > select PPC_CELL > > ? > > Besides, I don't see any platform stating "depends on CPU_BIG_ENDIAN" > or "depends on CPU_LITTLE_ENDIAN" in its Kconfig, which means all the > platforms support both big endian and little endian, at least, based on > the information provided by Kconfigs. > > Is this true? > > Thanks and Best Regards, > Boqun _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
