Fix build against libpthread

* Makefile.am (filter_LDADD): Use -lpthread instead of -lthreads.
* filter.h: Include <pthread.h> instead of <cthreads.h>
* filter.c: Use pthread functions instead of cthreads functions.
* node.h: Likewise.
* node.c: Likewise.

1 files changed, 1 insertions, 1 deletions

diff --git a/filter.h b/filter.h
index 6be032246..6e2ff5ac4 100644
--- a/filter.h
+++ b/filter.h
@@ -28,7 +28,7 @@
 /*---------------------------------------------------------------------------*/
 #include <stddef.h>
 #include <stdlib.h>
-#include <cthreads.h>
+#include <pthread.h>
 #include <unistd.h>
 #include <sys/mman.h>
 #include <sys/types.h>