Index: trunk/scconfig/gen_conf.sh
===================================================================
--- trunk/scconfig/gen_conf.sh	(revision 31620)
+++ trunk/scconfig/gen_conf.sh	(revision 31621)
@@ -126,6 +126,18 @@
 		return path
 	}
 
+	# structs on the first level must be const
+	/struct/ && (level == 0) {
+		if (!($0 ~ "struct *[a-z_]*temp_s")) { # special case for core/librnd temp storage
+			tmp=$0
+			sub("struct.*$", "", tmp)
+			if (!(tmp ~ "const")) {
+				print "First level structs must be const in line", NR > stderr
+				exit 1
+			}
+		}
+	}
+
 	/[{]/ {
 		uid = uids++
 		LEN[uid] = 0
Index: trunk/src/conf_core.h
===================================================================
--- trunk/src/conf_core.h	(revision 31620)
+++ trunk/src/conf_core.h	(revision 31621)
@@ -12,7 +12,7 @@
 
 typedef struct {
 
-	struct {
+	struct pcb_rnd_core_temp_s {
 		RND_CFT_BOOLEAN rat_warn;              /* rats nest has set warnings */
 		RND_CFT_BOOLEAN clip_inhibit_chg;      /* dummy node to inform the menu about clip inhibit change */
 	} temp;
@@ -85,7 +85,7 @@
 		RND_CFT_STRING subc_conv_refdes;       /* automatic refdes value assigned to new subcircuits on conversion from objects - if empty, no refdes text or attribute is added; if the value is <?>, the refdes text object is added but no refdes attribute is created */
 	} editor;
 
-	struct {
+	const struct {
 		struct {
 			RND_CFT_STRING method;             /* method/strategy of placement; one of: disperse, frame, fit */
 			RND_CFT_STRING location;           /* placement coordinate for methods that require it; if empty, use fixed coordinates at x,y; if non-empty, it may be: mark, center */
Index: trunk/src/librnd/core/hidlib_conf.h
===================================================================
--- trunk/src/librnd/core/hidlib_conf.h	(revision 31620)
+++ trunk/src/librnd/core/hidlib_conf.h	(revision 31621)
@@ -41,7 +41,7 @@
 
 typedef struct {
 
-	struct {
+	struct rnd_conf_temp_s {
 		RND_CFT_BOOLEAN click_cmd_entry_active;/* true if the command line is active when the user click - this gives the command interpreter a chance to capture the click and use the coords */
 	} temp;