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| author | Michael Brown <mcb30@ipxe.org> | 2021-07-15 13:46:34 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2021-07-15 14:16:17 +0100 |
| commit | 8d08300ad945988e0ce2fc24a34c19613154bae5 (patch) | |
| tree | a22a67f4708889adc21d31eaa9d881438057fd2a | |
| parent | 2690f730961e335875cac5fd9cf870a94eaef11a (diff) | |
| download | ipxe-8d08300ad945988e0ce2fc24a34c19613154bae5.tar.gz | |
[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 <mcb30@ipxe.org>
| -rw-r--r-- | src/include/endian.h | 4 |
1 files changed, 4 insertions, 0 deletions
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" |