On Fri, Aug 15, 2014 at 5:47 AM, Max Filippov <jcmvbkbc@xxxxxxxxx> wrote: > 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 Correction: it always selects CPU_LITTLE_ENDIAN, regardless of the compiler endianness. > find anything related to __BUILDING_TIME_BIG_ENDIAN__. Am I missing > something? -- Thanks. -- Max
