$NetBSD: patch-configure.ac,v 1.4 2016/09/23 19:16:29 jnemeth Exp $

--- configure.ac.orig	2015-10-09 22:23:39.000000000 +0000
+++ configure.ac
@@ -543,7 +543,7 @@ AC_CHECK_HEADERS([xlocale.h])
 
 AC_CHECK_HEADERS([winsock.h winsock2.h])
 
-AC_CHECK_HEADER([sys/poll.h],
+AC_CHECK_HEADER([poll.h],
 	 [],
      AC_DEFINE([AST_POLL_COMPAT], 1, [Define to 1 if internal poll should be used.]))
 
@@ -597,7 +597,7 @@ AC_FUNC_STRNLEN
 AC_FUNC_STRTOD
 AC_FUNC_UTIME_NULL
 AC_FUNC_VPRINTF
-AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap ntohll newlocale ppoll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl])
+AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob htonll ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap ntohll newlocale ppoll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strptime_l strftime_l strtod strtol strtold strtoq unsetenv utime vasprintf getpeereid sysctl swapctl])
 
 # NOTE: we use AC_CHECK_LIB to get -lm into the arguments for later checks,
 # so that AC_CHECK_FUNCS can detect functions in that library.
@@ -648,9 +648,9 @@ AC_SUBST(PBX_DYNAMIC_LIST)
 LDFLAGS=${old_LDFLAGS}
 rm -f conftest.dynamics
 
-AC_CHECK_HEADER([sys/poll.h],
+AC_CHECK_HEADER([poll.h],
    [HAS_POLL=1]
-   AC_DEFINE([HAVE_SYS_POLL_H], 1, [Define to 1 if your system has working sys/poll.h]),
+   AC_DEFINE([HAVE_SYS_POLL_H], 1, [Define to 1 if your system has working poll.h]),
    )
 
 AC_ARG_ENABLE([internal-poll],
@@ -1162,6 +1162,9 @@ AST_C_DEFINE_CHECK([IP_MTU_DISCOVER], [I
 AC_CHECK_HEADER([libkern/OSAtomic.h],
                 [AC_DEFINE_UNQUOTED([HAVE_OSX_ATOMICS], 1, [Define to 1 if OSX atomic operations are supported.])])
 
+AC_CHECK_HEADER([sys/atomic.h],
+                [AC_DEFINE_UNQUOTED([HAVE_SYS_ATOMIC_H], 1, [Define to 1 if sys/atomic.h atomic operations are supported.])])
+
 AC_CHECK_SIZEOF([int])
 AC_CHECK_SIZEOF([long])
 AC_CHECK_SIZEOF([long long])