make ndssrc optional

configure.ac

@@ -88,7 +88,11 @@ AC_SUBST([FFTW_LIBS])
 #
 
 
-PKG_CHECK_MODULES([NDS2], [nds2-client], , [AC_MSG_ERROR([Not found!])])
+PKG_CHECK_MODULES([NDS2], [nds2-client], [HAVE_NDS2="yes"], [AC_MSG_WARN([Not found!]) ; HAVE_NDS2="no"])
+AM_CONDITIONAL([COND_NDS2], [test "${HAVE_NDS2}" == "yes"])
+if test "${HAVE_NDS2}" == "yes" ; then
+	AC_DEFINE([HAVE_NDS2], 1)
+fi
 AC_SUBST([NDS2_CFLAGS])
 AC_SUBST([NDS2_LIBS])
 

src/plugins/Makefile.am

@@ -2,10 +2,15 @@ INCLUDES = -I$(top_srcdir)/src/lib
 
 plugin_LTLIBRARIES = libgstlal.la
 
+if COND_NDS2
+NDSSRC_SOURCES = gstlal_ndssrc.h gstlal_ndssrc.c
+else
+NDSSRC_SOURCES =
+endif
+
 libgstlal_la_SOURCES = \
 	gstlal_plugins.h gstlal.c \
 	gstlal_framesrc.h gstlal_framesrc.c \
-	gstlal_ndssrc.h gstlal_ndssrc.c \
 	low_latency_inspiral_functions.h low_latency_inspiral_functions.c \
 	gstlal_matrixmixer.h gstlal_matrixmixer.c \
 	gstlal_simulation.h gstlal_simulation.c \
@@ -22,7 +27,8 @@ libgstlal_la_SOURCES = \
 	gstlal_togglecomplex.h gstlal_togglecomplex.c \
 	gstlal_nofakedisconts.h gstlal_nofakedisconts.c \
 	gstlal_reblock.h gstlal_reblock.c \
-	gstlal_delay.h gstlal_delay.c
+	gstlal_delay.h gstlal_delay.c \
+	$(NDSSRC_SOURCES)
 libgstlal_la_CFLAGS = -O2 $(AM_CFLAGS) $(CFLAGS) ${gstreamer_CFLAGS} ${LAL_CFLAGS} ${GSL_CFLAGS} ${FFTW_CFLAGS} ${NDS2_CFLAGS}
 libgstlal_la_LIBADD = ${gstreamer_LIBS} ${LAL_LIBS} ${GSL_LIBS} ${FFTW_LIBS} ${NDS2_LIBS} $(top_srcdir)/src/lib/libgstlal.la
 libgstlal_la_LDFLAGS = ${GSTREAMER_PLUGIN_LDFLAGS}

src/plugins/gstlal.c

@@ -76,7 +76,6 @@
 #include <gstlal.h>
 #include <gstlal_plugins.h>
 #include <gstlal_framesrc.h>
-#include <gstlal_ndssrc.h>
 #include <gstlal_matrixmixer.h>
 #include <gstlal_simulation.h>
 #include <gstlal_whiten.h>
@@ -92,6 +91,10 @@
 #include <gstlal_nofakedisconts.h>
 #include <gstlal_reblock.h>
 #include <gstlal_delay.h>
+#ifdef HAVE_NDS2
+#include <gstlal_ndssrc.h>
+#endif
+
 
 /*
  * ============================================================================
@@ -121,7 +124,6 @@ static gboolean plugin_init(GstPlugin *plugin)
 		GType type;
 	} *element, elements[] = {
 		{"lal_framesrc", GSTLAL_FRAMESRC_TYPE},
-		{"ndssrc", GSTLAL_NDSSRC_TYPE},
 		{"lal_matrixmixer", GSTLAL_MATRIXMIXER_TYPE},
 		{"lal_simulation", GSTLAL_SIMULATION_TYPE},
 		{"lal_whiten", GSTLAL_WHITEN_TYPE},
@@ -138,6 +140,9 @@ static gboolean plugin_init(GstPlugin *plugin)
 		{"lal_nofakedisconts", GSTLAL_NOFAKEDISCONTS_TYPE},
 		{"lal_reblock", GSTLAL_REBLOCK_TYPE},
 		{"lal_delay", GSTLAL_DELAY_TYPE},
+#ifdef HAVE_NDS2
+		{"ndssrc", GSTLAL_NDSSRC_TYPE},
+#endif
 		{NULL, 0},
 	};
 	struct {