From 1a5da55280b411270fa747f8fc04c7b43ac5a800 Mon Sep 17 00:00:00 2001
From: Francesco Lannutti <nicolati@users.sourceforge.net>
Date: Sat, 17 Nov 2012 12:45:41 +0100
Subject: [PATCH] conditional compilation CLUSTER

---
 configure.ac                      | 1 +
 src/spicelib/analysis/Makefile.am | 8 ++++++--
 src/spicelib/analysis/cluster.c   | 2 --
 3 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/configure.ac b/configure.ac
index 57eddd918..aa251623a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -935,6 +935,7 @@ if test "x$enable_cluster" = xyes; then
     AC_DEFINE([CLUSTER], [], [Spice cluster support])
     LIBS="$LIBS -lpthread"
 fi
+AM_CONDITIONAL([HAVE_CLUSTER_WANTED], [test "x$enable_cluster" = xyes])
 
 if test "x$enable_expdevices" = xyes; then
     AC_DEFINE([EXP_DEV], [], [Define if we want to enable experimental devices])
diff --git a/src/spicelib/analysis/Makefile.am b/src/spicelib/analysis/Makefile.am
index 86d6b7371..fef0aae88 100644
--- a/src/spicelib/analysis/Makefile.am
+++ b/src/spicelib/analysis/Makefile.am
@@ -94,8 +94,12 @@ libckt_la_SOURCES = \
 		tfsetp.c	\
 		tranaskq.c	\
 		traninit.c	\
-		transetp.c	\
-		cluster.c
+		transetp.c
+
+
+if HAVE_CLUSTER_WANTED
+libckt_la_SOURCES += cluster.c
+endif
 
 
 if PSS_WANTED
diff --git a/src/spicelib/analysis/cluster.c b/src/spicelib/analysis/cluster.c
index c34f75181..72c98c39c 100644
--- a/src/spicelib/analysis/cluster.c
+++ b/src/spicelib/analysis/cluster.c
@@ -1,6 +1,5 @@
 /* Spice hooks */
 #include "ngspice/ngspice.h"
-#ifdef CLUSTER
 #include "ngspice/inpdefs.h"
 #include "ngspice/cluster.h"
 #include "ngspice/cktdefs.h"
@@ -423,4 +422,3 @@ int CLUsync(double time,double *delta, int error){
     return 1;
   }
 }
-#endif