From 8d08300ad945988e0ce2fc24a34c19613154bae5 Mon Sep 17 00:00:00 2001 From: Michael Brown Date: Thu, 15 Jul 2021 13:46:34 +0100 Subject: [PATCH] [libc] Allow for externally-defined LITTLE_ENDIAN and BIG_ENDIAN constants When building the Linux userspace binaries, the external system headers may have already defined values for the __LITTLE_ENDIAN and __BIG_ENDIAN constants. Fix by retaining the existing values if already defined, since the actual values of these constants do not matter. Signed-off-by: Michael Brown --- src/include/endian.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/src/include/endian.h b/src/include/endian.h index 79c3163ee..bdae9de45 100644 --- a/src/include/endian.h +++ b/src/include/endian.h @@ -8,14 +8,18 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); * Little-endian systems should define BYTE_ORDER as LITTLE_ENDIAN. * This constant is intended to be used only at compile time. */ +#ifndef __LITTLE_ENDIAN #define __LITTLE_ENDIAN 0x44332211UL +#endif /** Constant representing big-endian byte order * * Big-endian systems should define BYTE_ORDER as BIG_ENDIAN. * This constant is intended to be used only at compile time. */ +#ifndef __BIG_ENDIAN #define __BIG_ENDIAN 0x11223344UL +#endif #include "bits/endian.h"