On Fri, Aug 16, 2013 at 7:43 PM, Guenter Roeck <li...@roeck-us.net> wrote: > On 08/16/2013 02:45 AM, Max Filippov wrote: >>>> >>>> Guenter, >>>> can you share a complete build log with V=1? >>>> >>> >>> http://roeck-us.net/linux/logs/make.xtensa.log.bad >>> http://roeck-us.net/linux/logs/make.xtensa.log.ok >>> >>> Key difference: the failing command in the bad case is >>> xtensa-linux-objcopy -O elf32-xtensa-le >>> and in the good case >>> xtensa-linux-objcopy -O elf32-xtensa-be >>> >>> Same compiler (4.6.3 from kernel.org), same configuration file, same >>> command >>> line. >>> Configuration file is generated from defconfig, and the resulting .config >>> file >>> is the same in both cases. >>> >>> If I execute make and expicitly set BIG_ENDIAN=1 on the failing system as >>> parameter to it, >>> it works fine. If I set BIG_ENDIAN=0 on the passing system, it fails. >>> >>> I am puzzled. Guess there must be something different, but I have no idea >>> what it might be. >> >> >> What is the output of >> >> echo -e __XTENSA_EB__ | xtensa-linux-gcc -E - >> >> on the failing system? >> > It is "1", but that let me pinpoint the problem. > > On the failing system, the version of echo executed by make does > not understand the "-e" option. Thus, when running > arch/xtensa/boot/Makefile, > "echo -e __XTENSA_EB__" returns "-e __XTENSA_EB__", which doesn't compile, > and BIG_ENDIAN ends up being 0. So the compiler is completely innocent. > > I found out the root source: SHELL is set the /bin/sh, which on the failing > system points to /bin/dash (default in Ubuntu, or at least it used to be). > dash apparently has a built-in version of echo which does not understand > '-e'. > Oh well.
Cool. OTOH I don't think that we need to -e to output __XTENSA_EB__. Will send a patch for that. -- Thanks. -- Max -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
