Index: trunk/spectro/inst.c
===================================================================
--- trunk.orig/spectro/inst.c	2014-09-01 20:08:46.629215428 +0200
+++ trunk/spectro/inst.c	2014-09-01 20:08:46.621215261 +0200
@@ -59,11 +59,12 @@
 #if defined(ENABLE_FAST_SERIAL)
 instType fast_ser_inst_type(icoms *p, int tryhard, 
        inst_code (*uicallback)(void *cntx, inst_ui_purp purp), void *cntx);
+#endif /* ENABLE_FAST_SERIAL */
 # if defined(ENABLE_SERIAL)
 static instType ser_inst_type(icoms *p, 
        inst_code (*uicallback)(void *cntx, inst_ui_purp purp), void *cntx);
 # endif /* ENABLE_SERIAL */
-#endif /* ENABLE_FAST_SERIAL */
+
 
 /* ------------------------------------ */
 /* Default methods for instrument class */
Index: trunk/spectro/icoms_nt.c
===================================================================
--- trunk.orig/spectro/icoms_nt.c	2014-09-01 20:08:46.629215428 +0200
+++ trunk/spectro/icoms_nt.c	2014-09-01 20:08:46.621215261 +0200
@@ -22,8 +22,12 @@
 	struct fast_com_name *next;
 } fast_com_name;
 
-#if defined(ENABLE_SERIAL) || defined(ENABLE_FAST_SERIAL)
-instType fast_ser_inst_type(icoms *p, int tryhard, void *, void *); 
+#if defined(ENABLE_FAST_SERIAL)
+instType fast_ser_inst_type(icoms *p, int tryhard, void *, void *);
+#endif /* ENABLE_FAST_SERIAL */
+
+#if defined(ENABLE_SERIAL)
+instType ser_inst_type(icoms *p, void *, void *);
 #endif /* ENABLE_SERIAL */
 
 /* Create and return a list of available serial ports or USB instruments for this system. */
Index: trunk/spectro/icoms_ux.c
===================================================================
--- trunk.orig/spectro/icoms_ux.c	2014-09-01 20:08:46.629215428 +0200
+++ trunk/spectro/icoms_ux.c	2014-09-01 20:08:46.621215261 +0200
@@ -46,8 +46,15 @@
 #include <mach/task_policy.h>
 #endif /* __APPLE__ */
 
-#if defined(ENABLE_SERIAL) || defined(ENABLE_FAST_SERIAL)
-instType fast_ser_inst_type(icoms *p, int tryhard, void *, void *); 
+#include "inst.h"
+
+#if defined(ENABLE_FAST_SERIAL)
+instType fast_ser_inst_type(icoms *p, int tryhard, void *, void *);
+#endif /* ENABLE_FAST_SERIAL */
+
+#if defined(ENABLE_SERIAL)
+static instType ser_inst_type(icoms *p, 
+       inst_code (*uicallback)(void *cntx, inst_ui_purp purp), void *cntx);
 #endif /* ENABLE_SERIAL */
 
 /* Create and return a list of available serial ports or USB instruments for this system */
@@ -134,7 +141,12 @@
 				icoms *icom;
 				if ((path = p->get_last_path(p)) != NULL
 				 && (icom = new_icoms(path, p->log)) != NULL) {
+#if defined(ENABLE_FAST_SERIAL)
 					instType itype = fast_ser_inst_type(icom, 0, NULL, NULL);
+#endif
+#if defined(ENABLE_SERIAL)
+					instType itype = ser_inst_type(icom, NULL, NULL);
+#endif
 					if (itype != instUnknown)
 						icompaths_set_serial_itype(path, itype);
 					icom->del(icom);
@@ -279,7 +291,12 @@
 				icoms *icom;
 				if ((path = p->get_last_path(p)) != NULL
 				 && (icom = new_icoms(path, p->log)) != NULL) {
+#if defined(ENABLE_FAST_SERIAL)
 					instType itype = fast_ser_inst_type(icom, 0, NULL, NULL);
+#endif
+#if defined(ENABLE_SERIAL)
+					instType itype = ser_inst_type(icom, (void *)NULL, (void *)NULL);
+#endif
 					if (itype != instUnknown)
 						icompaths_set_serial_itype(path, itype);
 					icom->del(icom);
Index: trunk/spectro/Makefile.UNIX
===================================================================
--- trunk.orig/spectro/Makefile.UNIX	2014-01-31 05:08:58.000000000 +0100
+++ trunk/spectro/Makefile.UNIX	2014-09-01 20:10:22.819216376 +0200
@@ -26,7 +26,7 @@
 LIBOF     =
 RANLIB    = echo
 AS        = as
-CCFLAGSDEF   = -DUNIX -c
+CCFLAGSDEF   = -DUNIX -c -fPIC
 CC        = cc $(CCFLAGS) $(STDHDRS)
 CCOF      = -o 
 LINKFLAGSDEF = -lm -lpthread -lrt