$NetBSD: patch-configure.ac,v 1.3 2021/01/02 22:45:43 jnemeth Exp $

--- configure.ac.orig	2019-10-08 17:10:52.000000000 +0000
+++ configure.ac
@@ -743,7 +743,7 @@ 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.]))
 
@@ -795,7 +795,7 @@ 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 ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap newlocale pipe2 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 uselocale utime vasprintf getpeereid sysctl swapctl malloc_trim])
+AC_CHECK_FUNCS([asprintf atexit closefrom dup2 eaccess endpwent euidaccess ffsll ftruncate getcwd gethostbyname gethostname getloadavg gettimeofday glob ioperm inet_ntoa isascii memchr memmove memset mkdir mkdtemp munmap newlocale pipe2 ppoll putenv re_comp regcomp select setenv socket strcasecmp strcasestr strchr strcspn strdup strerror strftime_l strlcat strlcpy strncasecmp strndup strnlen strrchr strsep strspn strstr strtod strtol strtold strtoq unsetenv uselocale utime vasprintf getpeereid sysctl swapctl malloc_trim])
 
 AC_MSG_CHECKING(for htonll)
 AC_LINK_IFELSE(
@@ -864,9 +864,9 @@ 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],
@@ -1477,6 +1477,9 @@ 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])