diff options
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/port/pg_bswap.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/include/port/pg_bswap.h b/src/include/port/pg_bswap.h index dbf9df61559..d2e0605a662 100644 --- a/src/include/port/pg_bswap.h +++ b/src/include/port/pg_bswap.h @@ -139,7 +139,14 @@ pg_bswap64(uint64 x) * the same result as a memcmp() of the corresponding original Datums, but can * be much cheaper. It's generally safe to do this on big-endian systems * without any special transformation occurring first. + * + * If SIZEOF_DATUM is not defined, then postgres.h wasn't included and these + * macros probably shouldn't be used, so we define nothing. Note that + * SIZEOF_DATUM == 8 would evaluate as 0 == 8 in that case, potentially + * leading to the wrong implementation being selected and confusing errors, so + * defining nothing is safest. */ +#ifdef SIZEOF_DATUM #ifdef WORDS_BIGENDIAN #define DatumBigEndianToNative(x) (x) #else /* !WORDS_BIGENDIAN */ @@ -149,5 +156,6 @@ pg_bswap64(uint64 x) #define DatumBigEndianToNative(x) pg_bswap32(x) #endif /* SIZEOF_DATUM == 8 */ #endif /* WORDS_BIGENDIAN */ +#endif /* SIZEOF_DATUM */ #endif /* PG_BSWAP_H */ |