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endians.h: Fix bad assumption of valid __BYTE_ORDER__ values.

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On the OpenIndiana Hipster distribution, compiling with GCC 4.9 would
fail because __BYTE_ORDER__ was defined but not to any of the values
assumed to be associated with this define (__LITTLE_ENDIAN__ or
__BIG_ENDIAN__). Instead it was defined to either
__ORDER_LITTLE_ENDIAN__ or __ORDER_BIG_ENDIAN__. This caused
compilation to fail.

Fixed by checking that all referenced defines are in fact defined
before using them and adding an additional #elif clause for this newly
discovered condition.
This commit is contained in:
Erik Larsson 2016-02-16 20:29:56 +01:00
parent 9dee659190
commit 9d1360b282
1 changed files with 7 additions and 1 deletions
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8
include/ntfs-3g/endians.h
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@ -61,10 +61,16 @@
# define __BYTE_ORDER BYTE_ORDER
# define __LITTLE_ENDIAN LITTLE_ENDIAN
# define __BIG_ENDIAN BIG_ENDIAN
# elif defined(__BYTE_ORDER__)
# elif defined(__BYTE_ORDER__) && defined(__LITTLE_ENDIAN__) && \
defined(__BIG_ENDIAN__)
# define __BYTE_ORDER __BYTE_ORDER__
# define __LITTLE_ENDIAN __LITTLE_ENDIAN__
# define __BIG_ENDIAN __BIG_ENDIAN__
# elif defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
defined(__ORDER_BIG_ENDIAN__)
# define __BYTE_ORDER __BYTE_ORDER__
# define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
# define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
# elif (defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)) || \
defined(WORDS_LITTLEENDIAN)
# define __BYTE_ORDER 1