Fix swapctl() argument count detection on OpenBSD.

on OpenBSD swapctl() takes three arguments, but is defined in unistd.h
and also needs sys/param.h.

http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man2/swapctl.2

we need to add those headers to both detections to make sure the test
on 'swapctl takes two arguments' correctly fails.

diff --git a/configure.ac b/configure.ac
index 9dd30c7..03eaf3c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -809,7 +809,9 @@ if test "x$have_swapctl" = "xyes"; then
 #  undef _LARGEFILE64_SOURCE
 #endif
 #include <sys/stat.h>
+#include <sys/param.h>
 #include <sys/swap.h>
+#include <unistd.h>
 ]]],
 [[[
 int num = swapctl(0, NULL);
@@ -829,7 +831,9 @@ int num = swapctl(0, NULL);
 #  undef _LARGEFILE64_SOURCE
 #endif
 #include <sys/stat.h>
+#include <sys/param.h>
 #include <sys/swap.h>
+#include <unistd.h>
 ]]],
 [[[
 int num = swapctl(0, NULL, 0);