diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/port/pg_iovec.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/include/port/pg_iovec.h b/src/include/port/pg_iovec.h index df40c7208be..90be3af449d 100644 --- a/src/include/port/pg_iovec.h +++ b/src/include/port/pg_iovec.h @@ -21,9 +21,6 @@ #else -/* POSIX requires at least 16 as a maximum iovcnt. */ -#define IOV_MAX 16 - /* Define our own POSIX-compatible iovec struct. */ struct iovec { @@ -34,6 +31,15 @@ struct iovec #endif /* + * If <limits.h> didn't define IOV_MAX, define our own. X/Open requires at + * least 16. (GNU Hurd apparently feel that they're not bound by X/Open, + * because they don't define this symbol at all.) + */ +#ifndef IOV_MAX +#define IOV_MAX 16 +#endif + +/* * Define a reasonable maximum that is safe to use on the stack in arrays of * struct iovec and other small types. The operating system could limit us to * a number as low as 16, but most systems have 1024. |