HP-UX needs _HPUX_ALT_XOPEN_SOCKET_API to be defined to be able to
use various POSIX versions of networking functions. Notably sendmsg()
resulted in "sendmsg() failed (9: Bad file number)" alerts without it.
See xopen_networking(7) for more details.
This fixes alignment problems observerd on ARMs, and likely also needed
for MIPSes. Unless we know alignment is not required just assume we
need 16, which appears to be safe default for all architectures.
See here for details:
http://mailman.nginx.org/pipermail/nginx/2012-June/034139.html
New versions of icc confuse auto/cc/name due to introduced handling
of a "icc -v":
$ icc -v
icc version 12.1.3 (gcc version 4.6.0 compatibility)
$ icc -V
Intel(R) C Compiler XE for applications running on IA-32, Version 12.1.3.293 Build 20120212
Copyright (C) 1985-2012 Intel Corporation. All rights reserved.
FOR NON-COMMERCIAL USE ONLY
See report here:
http://mailman.nginx.org/pipermail/nginx/2012-February/032177.html
in the sys_nerr test.
o When sys_nerr and _sys_nerr are missed on a particular platform
and our euristic for a maximum errno detection applied always
print the maximum errno number we reached instead of printing void.[*]
* patch from Maxim Dounin
This commit makes possible to build nginx on AIX 7.1.
NetBSD 5.0+ has SO_ACCEPTFILTER support merged from FreeBSD, and having
accept filter check in FreeBSD-specific ngx_freebsd_config.h prevents it
from being used on NetBSD. Therefore move the check into configure (and
do the same for Linux-specific TCP_DEFER_ACCEPT, just to be in line).
At least Sun Studio 12 has problems with bit-fields exposed by nginx code
(caught by test suite). They seems to be fixed in Sun Studio 12.1. As a
workaround use "-fast -xalias_level=any" for older versions, it resolves
the problem.
Catch up with new Linux version numbering scheme as announced at [1] and
suppress unrecognized versions to actually use default 0.
[1] https://lkml.org/lkml/2011/5/29/204
This configure test must run before auto/make, because it adds library.
auto/unix was placed after auto/make just for historical reasons.
Patch by Denis F. Latypoff
