Index: trunk/Makefile.conf.in
===================================================================
--- trunk/Makefile.conf.in	(revision 28131)
+++ trunk/Makefile.conf.in	(revision 28132)
@@ -1,3 +1,9 @@
+# calculate the /local/confdir: either specified conf-time or compatibility fallback
+switch /local/confdir
+	case {^$}  put /local/confdir_final_m [@@/local/prefix@/share/pcb-rnd@]; end
+	default    put /local/confdir_final_m /local/confdir; end
+end
+
 print [@# generated by ./configure, do not modify
 
 # Compatibility with autotools on DESTDIR - Debian really wants this
@@ -8,9 +14,9 @@
 DOCDIR=$(Install_root)@/local/prefix@/share/doc/pcb-rnd
 LIBDIR=$(Install_root)@/local/prefix@/lib/pcb-rnd
 BINDIR=$(Install_root)@/local/prefix@/bin
-ETCDIR=$(Install_root)/etc
 DATADIR=$(Install_root)@/local/prefix@/share/pcb-rnd
 MAN1DIR=$(Install_root)@/local/prefix@@/local/man1dir@
+CONFDIR=$(Install_root)@/local/confdir_final_m@
 RM=@/host/fstools/rm@
 CP=@/host/fstools/cp@
 LN=@/host/fstools/ln@
Index: trunk/config.h.in
===================================================================
--- trunk/config.h.in	(revision 28131)
+++ trunk/config.h.in	(revision 28132)
@@ -164,6 +164,12 @@
 print {\n/* Not available */\n#define TODO(x)\n}
 end
 
+# calculate the /local/confdir: either specified conf-time or compatibility fallback
+switch /local/confdir
+	case {^$} put /local/confdir_final {PCBSHAREDIR}; end
+	default put /local/confdir_final [@"@/local/confdir@"@]; end
+end
+
 print [@
 
 /* The host "triplet" - it's really a pair now: machine-os */
@@ -200,6 +206,7 @@
 #define PCB_PREFIX "@/local/prefix@"
 #define PCBSHAREDIR PCB_PREFIX "/share/pcb-rnd"
 #define PCBLIBDIR PCB_PREFIX "/lib/pcb-rnd"
+#define PCBCONFDIR @/local/confdir_final@
 
 #define BINDIR PCB_PREFIX "/bin"
 
Index: trunk/scconfig/hooks.c
===================================================================
--- trunk/scconfig/hooks.c	(revision 28131)
+++ trunk/scconfig/hooks.c	(revision 28132)
@@ -71,6 +71,7 @@
 	printf(" --workaround-gtk-ctrl      enable GTK control key query workaround\n");
 	printf(" --man1dir=path             change installation path of man1 files (under prefix)\n");
 	printf(" --libarchdir=relpath       relative path under prefix for arch-lib-dir (e.g. lib64)\n");
+	printf(" --confdir=path             change installed conf path (normally matches sharedir)\n");
 	printf(" --all=plugin               enable all working plugins for dynamic load\n");
 	printf(" --all=buildin              enable all working plugins for static link\n");
 	printf(" --all=disable              disable all plugins (compile core only)\n");
@@ -152,6 +153,10 @@
 		put("/local/libarchdir", value);
 		return 1;
 	}
+	if (strcmp(key, "confdir") == 0) {
+		put("/local/confdir", value);
+		return 1;
+	}
 	if (strncmp(key, "workaround-", 11) == 0) {
 		const char *what = key+11;
 		if (strcmp(what, "gtk-ctrl") == 0) append("/local/pcb/workaround_defs", "\n#define PCB_WORKAROUND_GTK_CTRL 1");
@@ -310,6 +315,7 @@
 	put("/local/prefix", "/usr/local");
 	put("/local/man1dir", "/share/man/man1");
 	put("/local/libarchdir", "lib");
+	put("/local/confdir", "");
 
 #undef plugin_def
 #undef plugin_header