Hi Chen, On Thu, Aug 14, 2014 at 8:54 PM, Chen Gang <gang.chen.5i5j@xxxxxxxxx> wrote: > Normal architectures: > > - Big endian: avr32, frv, m68k, openrisc, parisc, s390, sparc > > - Little endian: alpha, blackfin, cris, hexagon, ia64, metag, mn10300, > score, unicore32, x86 > > - Choose in config time: arc, arm, arm64, c6x, m32r, mips, powerpc, sh > > Special architectures: > > - Deside by compiler: microblaze, tile, xtensa. > > - Deside by building host: um > > - Next, need improve Kbuild to probe endian to deside whether need mark > __BUILDING_TIME_BIG_ENDIAN__ before real config. [...] > diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig > index 3a617af..a3e8f7e 100644 > --- a/arch/xtensa/Kconfig > +++ b/arch/xtensa/Kconfig > @@ -22,6 +22,8 @@ config XTENSA > select HAVE_IRQ_TIME_ACCOUNTING > select HAVE_PERF_EVENTS > select COMMON_CLK > + select CPU_BIG_ENDIAN if __BUILDING_TIME_BIG_ENDIAN__ > + select CPU_LITTLE_ENDIAN if !CPU_BIG_ENDIAN > help > Xtensa processors are 32-bit RISC machines designed by Tensilica > primarily for embedded systems. These processors are both I've tested this part and it doesn't select neither CPU_BIG_ENDIAN, nor CPU_LITTLE_ENDIAN. And looking into the Kconfig/Kbuild I cound't find anything related to __BUILDING_TIME_BIG_ENDIAN__. Am I missing something? -- Thanks. -- Max
