Avoid using sysctl on linux

diff --git a/src/swap.c b/src/swap.c
index 61c9e28..0a86632 100644 (file)
--- a/src/swap.c
+++ b/src/swap.c
@@ -49,7 +49,8 @@
 #if HAVE_SYS_PARAM_H
 #include <sys/param.h>
 #endif
-#if HAVE_SYS_SYSCTL_H
+#if defined(HAVE_SYS_SYSCTL_H) && defined(HAVE_SYSCTLBYNAME)
+/* implies BSD variant */
 #include <sys/sysctl.h>
 #endif
 #if HAVE_SYS_DKSTAT_H