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Workarounds for older gcc releases such that endian.h works.

This commit is contained in:
Jonas 'Sortie' Termansen 2012-08-02 16:24:51 +02:00
parent 86f8662a4e
commit 78300931ba
1 changed files with 14 additions and 1 deletions
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15
sortix/include/sortix/kernel/endian.h
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@ -25,12 +25,25 @@
#ifndef SORTIX_ENDIAN_H
#define SORTIX_ENDIAN_H
// Work around older GCC versions that do not define this.
#if !defined(__BYTE_ORDER__) && (defined(__i386__) || defined(__x86_64__))
#if !defined(__ORDER_LITTLE_ENDIAN__)
#define __ORDER_LITTLE_ENDIAN__ 1234
#endif
#if !defined(__ORDER_BIG_ENDIAN__)
#define __ORDER_BIG_ENDIAN__ 4321
#endif
#if !defined(__BYTE_ORDER__)
#define __BYTE_ORDER__ __ORDER_LITTLE_ENDIAN__
#endif
#endif
#ifndef __BYTE_ORDER__
#error Your compiler needs to define the __BYTE_ORDER__ macro family.
#endif
#if __BYTE_ORDER__ != __ORDER_LITTLE_ENDIAN__ && \
__BYTE_ORDER__ != __ORDER_BIG_ENDIAN
__BYTE_ORDER__ != __ORDER_BIG_ENDIAN__
#error Exotic endian detected, you need to port this header.
#endif