pull latest kconfig from kernel

42 files changed, 10252 insertions, 5237 deletions

diff --git a/extra/config/Makefile b/extra/config/Makefile
index 519d55844..84a0ed34f 100644
--- a/extra/config/Makefile
+++ b/extra/config/Makefile
@@ -1,13 +1,35 @@
-# Makefile for uClibc
-#
-# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
-#
-# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
-#
-
+obj := .
+src := .
 top_srcdir=../../
 top_builddir=../../
+srctree := .
 include $(top_builddir)Rules.mak
-all: objs
-include Makefile.in
-include $(top_srcdir)Makerules
+
+include Makefile.kconfig
+
+__hostprogs := $(sort $(hostprogs-y) $(hostprogs-m))
+host-csingle    := $(foreach m,$(__hostprogs),$(if $($(m)-objs),,$(m)))
+host-cmulti := $(foreach m,$(__hostprogs),\
+           $(if $($(m)-cxxobjs),,$(if $($(m)-objs),$(m))))
+host-cobjs  := $(sort $(foreach m,$(__hostprogs),$($(m)-objs)))
+
+$(host-csingle): %: %.c FORCE
+	$(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) $(HOSTCFLAGS_$@) $(HOST_LOADLIBES) $< -o $@
+
+$(host-cmulti): %: $(host-cobjs) $(host-cshlib) FORCE
+	$(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) $(HOSTCFLAGS_$@) $(HOST_LOADLIBES) $($@-objs) -o $@
+
+$(host-cobjs): %.o: %.c FORCE
+	$(HOSTCC) $(HOST_EXTRACFLAGS) $(HOSTCFLAGS) $(HOSTCFLAGS_$@) -c $< -o $@
+
+$(obj)/%:: $(src)/%_shipped
+	$(Q)cat $< > $@
+
+clean:
+	$(Q)rm -f $(clean-files)
+distclean: clean
+	$(Q)rm -f $(lxdialog) $(conf-objs) $(mconf-objs) $(kxgettext-objs) \
+		$(hostprogs-y) $(qconf-cxxobjs) $(qconf-objs) $(gconf-objs)
+
+FORCE:
+.PHONY: FORCE clean distclean
diff --git a/extra/config/Makefile.in b/extra/config/Makefile.in
deleted file mode 100644
index 9d9b70e3b..000000000
--- a/extra/config/Makefile.in
+++ /dev/null
@@ -1,128 +0,0 @@
-# Makefile for uClibc
-#
-# Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
-#
-# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
-#
-
-ifeq ($(shell uname),SunOS)
-HOSTLIBNCURSES = -lcurses
-else
-HOSTLIBNCURSES = -lncurses
-endif
-ifeq (/usr/include/ncurses/ncurses.h, $(wildcard /usr/include/ncurses/ncurses.h))
-	HOSTNCURSES = -I/usr/include/ncurses -DCURSES_LOC="<ncurses.h>"
-else
-ifeq (/usr/include/ncurses/curses.h, $(wildcard /usr/include/ncurses/curses.h))
-	HOSTNCURSES = -I/usr/include/ncurses -DCURSES_LOC="<curses.h>"
-else
-ifeq (/usr/local/include/ncurses/ncurses.h, $(wildcard /usr/local/include/ncurses/ncurses.h))
-	HOSTNCURSES = -I/usr/local/include/ncurses -DCURSES_LOC="<ncurses.h>"
-else
-ifeq (/usr/local/include/ncurses/curses.h, $(wildcard /usr/local/include/ncurses/curses.h))
-	HOSTNCURSES = -I/usr/local/include/ncurses -DCURSES_LOC="<curses.h>"
-else
-ifeq (/usr/include/ncurses.h, $(wildcard /usr/include/ncurses.h))
-	HOSTNCURSES = -DCURSES_LOC="<ncurses.h>"
-else
-	HOSTNCURSES = -DCURSES_LOC="<curses.h>"
-endif
-endif
-endif
-endif
-endif
-
-BUILD_CFLAGS-config   := -I.
-
-BUILD_CFLAGS-mconf.o  := $(HOSTNCURSES)
-BUILD_CFLAGS-lxdialog := $(HOSTNCURSES)
-
-BUILD_LDFLAGS-mconf := $(HOSTLIBNCURSES)
-
-config_DIR := $(top_srcdir)extra/config
-config_OUT := $(top_builddir)extra/config
-
-config_SHIPPED_SRC := $(patsubst %,$(config_OUT)/%,lex.zconf.c zconf.tab.c zconf.tab.h)
-
-config_CONF_SRC    := conf.c
-config_MCONF_SRC   := mconf.c
-config_LXD_SRC := \
-		lxdialog/checklist.c lxdialog/menubox.c lxdialog/textbox.c \
-		lxdialog/yesno.c lxdialog/inputbox.c lxdialog/util.c \
-		lxdialog/msgbox.c
-config_SHARED_SRC  := $(config_OUT)/zconf.tab.c
-config_SHARED_DEP1 := $(patsubst %,$(config_DIR)/%,lkc.h lkc_proto.h expr.h)
-config_SHARED_DEP2 := $(patsubst %,$(config_OUT)/%,lkc_defs.h zconf.tab.h)
-config_SHARED_DEPS := $(config_SHARED_DEP1) $(config_SHARED_DEP2)
-config_CONF_OBJS   := $(patsubst %.c,$(config_OUT)/%.o,$(config_CONF_SRC))
-config_MCONF_OBJS  := $(patsubst %.c,$(config_OUT)/%.o,$(config_MCONF_SRC) $(config_LXD_SRC))
-config_SHARED_OBJS := $(patsubst %.c,%.o,$(config_SHARED_SRC))
-
-objs: ncurses $(config_OUT)/conf $(config_OUT)/mconf
-
-conf $(config_OUT)/conf: $(config_CONF_OBJS) $(config_SHARED_OBJS)
-	$(hcompile.u)
-
-mconf $(config_OUT)/mconf: $(config_MCONF_OBJS) $(config_SHARED_OBJS) | ncurses
-	$(hcompile.u)
-
-$(config_CONF_OBJS) $(config_MCONF_OBJS): $(config_OUT)/%.o : $(config_DIR)/%.c | $(config_SHARED_DEPS)
-	$(hcompile.o)
-
-$(config_OUT)/lkc_defs.h: $(config_DIR)/lkc_proto.h
-	@sed < $< > $@ 's/P(\([^,]*\),.*/#define \1 (\*\1_p)/'
-
-###
-# The following requires flex/bison
-# By default we use the _shipped versions, uncomment the 
-# following line if you are modifying the flex/bison src.
-#LKC_GENPARSER := 1
-
-ifdef LKC_GENPARSER
-
-%.tab.c %.tab.h: %.y
-	bison -t -d -v -b $* -p $(notdir $*) $<
-
-lex.%.c: %.l
-	flex -P$(notdir $*) -o$@ $<
-else
-
-$(config_OUT)/lex.zconf.o: $(config_OUT)/lex.zconf.c | $(config_SHARED_DEPS)
-	$(hcompile.o)
-
-$(config_SHIPPED_SRC): $(config_OUT)/% : $(config_DIR)/%_shipped
-	cp $< $@
-
-$(config_OUT)/zconf.tab.o: $(config_SHARED_SRC) | $(config_OUT)/lex.zconf.c $(patsubst %,$(config_DIR)/%,confdata.c expr.c symbol.c menu.c) $(config_SHARED_DEPS)
-	$(hcompile.o)
-
-endif
-
-.PHONY: ncurses
-
-ncurses:
-	@echo "main() {}" > $(config_OUT)/lxtemp.c
-	@if $(HOSTCC) $(config_OUT)/lxtemp.c -o $(config_OUT)/a.out $(HOSTLIBNCURSES) ; then \
-		$(RM) $(config_OUT)/{lxtemp.c,a.out}; \
-	else \
-		$(RM) $(config_OUT)/lxtemp.c; \
-		echo -e "\007" ;\
-		echo ">> Unable to find the Ncurses libraries." ;\
-		echo ">>" ;\
-		echo ">> You must have Ncurses installed in order" ;\
-		echo ">> to use 'make menuconfig'" ;\
-		echo ">>" ;\
-		echo ">> Maybe you want to try 'make config', which" ;\
-		echo ">> doesn't depend on the Ncurses libraries." ;\
-		echo ;\
-		exit 1 ;\
-	fi
-
-objclean-y += config_clean
-
-# to be removed after including into top Makefile.in
-clean: config_clean
-
-config_clean:
-	$(RM) $(config_OUT)/*.o $(config_OUT)/lxdialog/*.o $(config_SHIPPED_SRC) $(MCONF_OBJS) $(CONF_OBJS) \
-		conf mconf lkc_defs.h
diff --git a/extra/config/Makefile.kconfig b/extra/config/Makefile.kconfig
new file mode 100644
index 000000000..e67947d53
--- /dev/null
+++ b/extra/config/Makefile.kconfig
@@ -0,0 +1,278 @@
+# ===========================================================================
+# Kernel configuration targets
+# These targets are used from top-level makefile
+
+PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
+
+xconfig: $(obj)/qconf
+	$< arch/$(ARCH)/Kconfig
+
+gconfig: $(obj)/gconf
+	$< arch/$(ARCH)/Kconfig
+
+menuconfig: $(obj)/mconf
+	$< arch/$(ARCH)/Kconfig
+
+config: $(obj)/conf
+	$< arch/$(ARCH)/Kconfig
+
+oldconfig: $(obj)/conf
+	$< -o arch/$(ARCH)/Kconfig
+
+silentoldconfig: $(obj)/conf
+	$< -s arch/$(ARCH)/Kconfig
+
+update-po-config: $(obj)/kxgettext
+	xgettext --default-domain=linux \
+          --add-comments --keyword=_ --keyword=N_ \
+          --files-from=scripts/kconfig/POTFILES.in \
+          --output scripts/kconfig/config.pot
+	$(Q)ln -fs Kconfig_i386 arch/um/Kconfig_arch
+	$(Q)for i in `ls arch/`; \
+	do \
+	  scripts/kconfig/kxgettext arch/$$i/Kconfig \
+	    | msguniq -o scripts/kconfig/linux_$${i}.pot; \
+	done
+	$(Q)msgcat scripts/kconfig/config.pot \
+	  `find scripts/kconfig/ -type f -name linux_*.pot` \
+	  --output scripts/kconfig/linux_raw.pot
+	$(Q)msguniq --sort-by-file scripts/kconfig/linux_raw.pot \
+	    --output scripts/kconfig/linux.pot
+	$(Q)rm -f arch/um/Kconfig_arch
+	$(Q)rm -f scripts/kconfig/linux_*.pot scripts/kconfig/config.pot
+
+PHONY += randconfig allyesconfig allnoconfig allmodconfig defconfig
+
+randconfig: $(obj)/conf
+	$< -r arch/$(ARCH)/Kconfig
+
+allyesconfig: $(obj)/conf
+	$< -y arch/$(ARCH)/Kconfig
+
+allnoconfig: $(obj)/conf
+	$< -n arch/$(ARCH)/Kconfig
+
+allmodconfig: $(obj)/conf
+	$< -m arch/$(ARCH)/Kconfig
+
+defconfig: $(obj)/conf
+ifeq ($(KBUILD_DEFCONFIG),)
+	$< -d arch/$(ARCH)/Kconfig
+else
+	@echo *** Default configuration is based on '$(KBUILD_DEFCONFIG)'
+	$(Q)$< -D arch/$(ARCH)/configs/$(KBUILD_DEFCONFIG) arch/$(ARCH)/Kconfig
+endif
+
+%_defconfig: $(obj)/conf
+	$(Q)$< -D arch/$(ARCH)/configs/$@ arch/$(ARCH)/Kconfig
+
+# Help text used by make help
+help:
+	@echo  '  config	  - Update current config utilising a line-oriented program'
+	@echo  '  menuconfig	  - Update current config utilising a menu based program'
+	@echo  '  xconfig	  - Update current config utilising a QT based front-end'
+	@echo  '  gconfig	  - Update current config utilising a GTK based front-end'
+	@echo  '  oldconfig	  - Update current config utilising a provided .config as base'
+	@echo  '  silentoldconfig - Same as oldconfig, but quietly'
+	@echo  '  randconfig	  - New config with random answer to all options'
+	@echo  '  defconfig	  - New config with default answer to all options'
+	@echo  '  allmodconfig	  - New config selecting modules when possible'
+	@echo  '  allyesconfig	  - New config where all options are accepted with yes'
+	@echo  '  allnoconfig	  - New config where all options are answered with no'
+
+# lxdialog stuff
+check-lxdialog  := $(srctree)/$(src)/lxdialog/check-lxdialog.sh
+
+# Use reursively expanded variables so we do not call gcc unless
+# we really need to do so. (Do not call gcc as part of make mrproper)
+HOST_EXTRACFLAGS = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ccflags)
+HOST_LOADLIBES   = $(shell $(CONFIG_SHELL) $(check-lxdialog) -ldflags $(HOSTCC))
+
+HOST_EXTRACFLAGS += -DLOCALE
+
+PHONY += $(obj)/dochecklxdialog
+$(obj)/dochecklxdialog:
+	$(Q)$(CONFIG_SHELL) $(check-lxdialog) -check $(HOSTCC) $(HOST_LOADLIBES)
+
+always := dochecklxdialog
+
+
+# ===========================================================================
+# Shared Makefile for the various kconfig executables:
+# conf:	  Used for defconfig, oldconfig and related targets
+# mconf:  Used for the mconfig target.
+#         Utilizes the lxdialog package
+# qconf:  Used for the xconfig target
+#         Based on QT which needs to be installed to compile it
+# gconf:  Used for the gconfig target
+#         Based on GTK which needs to be installed to compile it
+# object files used by all kconfig flavours
+
+lxdialog := lxdialog/checklist.o lxdialog/util.o lxdialog/inputbox.o
+lxdialog += lxdialog/textbox.o lxdialog/yesno.o lxdialog/menubox.o
+
+conf-objs	:= conf.o  zconf.tab.o
+mconf-objs	:= mconf.o zconf.tab.o $(lxdialog)
+kxgettext-objs	:= kxgettext.o zconf.tab.o
+
+hostprogs-y := conf qconf gconf kxgettext
+
+#ifeq ($(MAKECMDGOALS),menuconfig)
+	hostprogs-y += mconf
+#endif
+
+ifeq ($(MAKECMDGOALS),xconfig)
+	qconf-target := 1
+endif
+ifeq ($(MAKECMDGOALS),gconfig)
+	gconf-target := 1
+endif
+
+
+ifeq ($(qconf-target),1)
+qconf-cxxobjs	:= qconf.o
+qconf-objs	:= kconfig_load.o zconf.tab.o
+endif
+
+ifeq ($(gconf-target),1)
+gconf-objs	:= gconf.o kconfig_load.o zconf.tab.o
+endif
+
+clean-files	:= lkc_defs.h qconf.moc .tmp_qtcheck \
+		   .tmp_gtkcheck zconf.tab.c lex.zconf.c zconf.hash.c
+
+# Needed for systems without gettext
+KBUILD_HAVE_NLS := $(shell \
+     if echo "\#include <libintl.h>" | $(HOSTCC) $(HOSTCFLAGS) -E - > /dev/null 2>&1 ; \
+     then echo yes ; \
+     else echo no ; fi)
+ifeq ($(KBUILD_HAVE_NLS),no)
+HOSTCFLAGS	+= -DKBUILD_NO_NLS
+endif
+
+# generated files seem to need this to find local include files
+HOSTCFLAGS_lex.zconf.o	:= -I$(src)
+HOSTCFLAGS_zconf.tab.o	:= -I$(src)
+
+HOSTLOADLIBES_qconf	= $(KC_QT_LIBS) -ldl
+HOSTCXXFLAGS_qconf.o	= $(KC_QT_CFLAGS) -D LKC_DIRECT_LINK
+
+HOSTLOADLIBES_gconf	= `pkg-config --libs gtk+-2.0 gmodule-2.0 libglade-2.0`
+HOSTCFLAGS_gconf.o	= `pkg-config --cflags gtk+-2.0 gmodule-2.0 libglade-2.0` \
+                          -D LKC_DIRECT_LINK
+
+$(obj)/qconf.o: $(obj)/.tmp_qtcheck
+
+ifeq ($(qconf-target),1)
+$(obj)/.tmp_qtcheck: $(src)/Makefile
+-include $(obj)/.tmp_qtcheck
+
+# QT needs some extra effort...
+$(obj)/.tmp_qtcheck:
+	@set -e; echo "  CHECK   qt"; dir=""; pkg=""; \
+	pkg-config --exists qt 2> /dev/null && pkg=qt; \
+	pkg-config --exists qt-mt 2> /dev/null && pkg=qt-mt; \
+	if [ -n "$$pkg" ]; then \
+	  cflags="\$$(shell pkg-config $$pkg --cflags)"; \
+	  libs="\$$(shell pkg-config $$pkg --libs)"; \
+	  moc="\$$(shell pkg-config $$pkg --variable=prefix)/bin/moc"; \
+	  dir="$$(pkg-config $$pkg --variable=prefix)"; \
+	else \
+	  for d in $$QTDIR /usr/share/qt* /usr/lib/qt*; do \
+	    if [ -f $$d/include/qconfig.h ]; then dir=$$d; break; fi; \
+	  done; \
+	  if [ -z "$$dir" ]; then \
+	    echo "*"; \
+	    echo "* Unable to find the QT installation. Please make sure that"; \
+	    echo "* the QT development package is correctly installed and"; \
+	    echo "* either install pkg-config or set the QTDIR environment"; \
+	    echo "* variable to the correct location."; \
+	    echo "*"; \
+	    false; \
+	  fi; \
+	  libpath=$$dir/lib; lib=qt; osdir=""; \
+	  $(HOSTCXX) -print-multi-os-directory > /dev/null 2>&1 && \
+	    osdir=x$$($(HOSTCXX) -print-multi-os-directory); \
+	  test -d $$libpath/$$osdir && libpath=$$libpath/$$osdir; \
+	  test -f $$libpath/libqt-mt.so && lib=qt-mt; \
+	  cflags="-I$$dir/include"; \
+	  libs="-L$$libpath -Wl,-rpath,$$libpath -l$$lib"; \
+	  moc="$$dir/bin/moc"; \
+	fi; \
+	if [ ! -x $$dir/bin/moc -a -x /usr/bin/moc ]; then \
+	  echo "*"; \
+	  echo "* Unable to find $$dir/bin/moc, using /usr/bin/moc instead."; \
+	  echo "*"; \
+	  moc="/usr/bin/moc"; \
+	fi; \
+	echo "KC_QT_CFLAGS=$$cflags" > $@; \
+	echo "KC_QT_LIBS=$$libs" >> $@; \
+	echo "KC_QT_MOC=$$moc" >> $@
+endif
+
+$(obj)/gconf.o: $(obj)/.tmp_gtkcheck
+
+ifeq ($(gconf-target),1)
+-include $(obj)/.tmp_gtkcheck
+
+# GTK needs some extra effort, too...
+$(obj)/.tmp_gtkcheck:
+	@if `pkg-config --exists gtk+-2.0 gmodule-2.0 libglade-2.0`; then		\
+		if `pkg-config --atleast-version=2.0.0 gtk+-2.0`; then			\
+			touch $@;								\
+		else									\
+			echo "*"; 							\
+			echo "* GTK+ is present but version >= 2.0.0 is required.";	\
+			echo "*";							\
+			false;								\
+		fi									\
+	else										\
+		echo "*"; 								\
+		echo "* Unable to find the GTK+ installation. Please make sure that"; 	\
+		echo "* the GTK+ 2.0 development package is correctly installed..."; 	\
+		echo "* You need gtk+-2.0, glib-2.0 and libglade-2.0."; 		\
+		echo "*"; 								\
+		false;									\
+	fi
+endif
+
+$(obj)/zconf.tab.o: $(obj)/lex.zconf.c $(obj)/zconf.hash.c
+
+$(obj)/kconfig_load.o: $(obj)/lkc_defs.h
+
+$(obj)/qconf.o: $(obj)/qconf.moc $(obj)/lkc_defs.h
+
+$(obj)/gconf.o: $(obj)/lkc_defs.h
+
+$(obj)/%.moc: $(src)/%.h
+	$(KC_QT_MOC) -i $< -o $@
+
+$(obj)/lkc_defs.h: $(src)/lkc_proto.h
+	sed < $< > $@ 's/P(\([^,]*\),.*/#define \1 (\*\1_p)/'
+
+
+###
+# The following requires flex/bison/gperf
+# By default we use the _shipped versions, uncomment the following line if
+# you are modifying the flex/bison src.
+# LKC_GENPARSER := 1
+
+ifdef LKC_GENPARSER
+
+$(obj)/zconf.tab.c: $(src)/zconf.y
+$(obj)/lex.zconf.c: $(src)/zconf.l
+$(obj)/zconf.hash.c: $(src)/zconf.gperf
+
+%.tab.c: %.y
+	bison -l -b $* -p $(notdir $*) $<
+	cp $@ $@_shipped
+
+lex.%.c: %.l
+	flex -L -P$(notdir $*) -o$@ $<
+	cp $@ $@_shipped
+
+%.hash.c: %.gperf
+	gperf < $< > $@
+	cp $@ $@_shipped
+
+endif
diff --git a/extra/config/POTFILES.in b/extra/config/POTFILES.in
new file mode 100644
index 000000000..cc94e46a7
--- /dev/null
+++ b/extra/config/POTFILES.in
@@ -0,0 +1,5 @@
+scripts/kconfig/mconf.c
+scripts/kconfig/conf.c
+scripts/kconfig/confdata.c
+scripts/kconfig/gconf.c
+scripts/kconfig/qconf.cc
diff --git a/extra/config/README.uClibc b/extra/config/README.uClibc
new file mode 100644
index 000000000..a20d89963
--- /dev/null
+++ b/extra/config/README.uClibc
@@ -0,0 +1,18 @@
+This is a copy of the kconfig code in the kernel tweaked to suite uClibc.
+
+To update:
+	cp -r /usr/src/linux/scripts/kconfig extra/config.new
+	cd extra/config.new
+	cp /usr/src/linux/Documentation/kbuild/kconfig-language.txt .
+	mv Makefile Makefile.kconfig
+	patch -p1 < ../config/kconfig-to-uclibc.patch
+	cp ../config/conf-header.sh ../config/README.uClibc .
+	cd ..
+	rm -rf config
+	mv config.new config
+
+Then verify the toplevel targets work:
+	config
+	defconfig
+	menuconfig
+	oldconfig
diff --git a/extra/config/conf-header.sh b/extra/config/conf-header.sh
new file mode 100755
index 000000000..90dfa999a
--- /dev/null
+++ b/extra/config/conf-header.sh
@@ -0,0 +1,27 @@
+#!/bin/sh -e
+
+# Turn .config into a header file
+
+if [ -z "$1" ] ; then
+	echo "Usage: conf-header.sh <.config>"
+	exit 1
+fi
+
+cat <<EOF
+#if !defined __FEATURES_H && !defined __need_uClibc_config_h
+# error Never include <bits/uClibc_config.h> directly; use <features.h> instead
+#endif
+
+#define __UCLIBC_MAJOR__ ${MAJOR_VERSION}
+#define __UCLIBC_MINOR__ ${MINOR_VERSION}
+#define __UCLIBC_SUBLEVEL__ ${SUBLEVEL}
+EOF
+
+exec \
+sed \
+	-e '/^#$/d' \
+	-e '/^[^#]/s:^\([^=]*\)=\(.*\):#define __\1__ \2:' \
+	-e '/^#define /s: y$: 1:' \
+	-e '/^# .* is not set$/s:^# \(.*\) is not set$:#undef __\1__:' \
+	-e 's:^# \(.*\)$:/* \1 */:' \
+	$1
diff --git a/extra/config/conf.c b/extra/config/conf.c
index 0907369dd..8ad8d9d4f 100644
--- a/extra/config/conf.c
+++ b/extra/config/conf.c
@@ -5,6 +5,7 @@
 
 #include <ctype.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <time.h>
@@ -82,6 +83,15 @@ static void conf_askvalue(struct symbol *sym, const char *def)
 	}
 
 	switch (input_mode) {
+	case set_no:
+	case set_mod:
+	case set_yes:
+	case set_random:
+		if (sym_has_value(sym)) {
+			printf("%s\n", def);
+			return;
+		}
+		break;
 	case ask_new:
 	case ask_silent:
 		if (sym_has_value(sym)) {
@@ -305,8 +315,7 @@ static int conf_choice(struct menu *menu)
 		printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 		def_sym = sym_get_choice_value(sym);
 		cnt = def = 0;
-		line[0] = '0';
-		line[1] = 0;
+		line[0] = 0;
 		for (child = menu->list; child; child = child->next) {
 			if (!menu_is_visible(child))
 				continue;
@@ -467,15 +476,14 @@ static void check_conf(struct menu *menu)
 		return;
 
 	sym = menu->sym;
-	if (sym) {
-		if (sym_is_changable(sym) && !sym_has_value(sym)) {
+	if (sym && !sym_has_value(sym)) {
+		if (sym_is_changable(sym) ||
+		    (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
 			if (!conf_cnt++)
 				printf(_("*\n* Restart config...\n*\n"));
 			rootEntry = menu_get_parent_menu(menu);
 			conf(rootEntry);
 		}
-		if (sym_is_choice(sym) && sym_get_tristate_value(sym) != mod)
-			return;
 	}
 
 	for (child = menu->list; child; child = child->next)
@@ -524,13 +532,14 @@ int main(int ac, char **av)
 			break;
 		case 'h':
 		case '?':
-			printf("%s [-o|-s] config\n", av[0]);
+			fprintf(stderr, "See README for usage info\n");
 			exit(0);
 		}
 	}
   	name = av[i];
 	if (!name) {
 		printf(_("%s: Kconfig file missing\n"), av[0]);
+		exit(1);
 	}
 	conf_parse(name);
 	//zconfdump(stdout);
@@ -559,6 +568,27 @@ int main(int ac, char **av)
 	case ask_new:
 		conf_read(NULL);
 		break;
+	case set_no:
+	case set_mod:
+	case set_yes:
+	case set_random:
+		name = getenv("KCONFIG_ALLCONFIG");
+		if (name && !stat(name, &tmpstat)) {
+			conf_read_simple(name, S_DEF_USER);
+			break;
+		}
+		switch (input_mode) {
+		case set_no:	 name = "allno.config"; break;
+		case set_mod:	 name = "allmod.config"; break;
+		case set_yes:	 name = "allyes.config"; break;
+		case set_random: name = "allrandom.config"; break;
+		default: break;
+		}
+		if (!stat(name, &tmpstat))
+			conf_read_simple(name, S_DEF_USER);
+		else if (!stat("all.config", &tmpstat))
+			conf_read_simple("all.config", S_DEF_USER);
+		break;
 	default:
 		break;
 	}
@@ -570,14 +600,28 @@ int main(int ac, char **av)
 			input_mode = ask_silent;
 			valid_stdin = 1;
 		}
-	}
+	} else if (conf_get_changed()) {
+		name = getenv("KCONFIG_NOSILENTUPDATE");
+		if (name && *name) {
+			fprintf(stderr, _("\n*** uClibc configuration requires explicit update.\n\n"));
+			return 1;
+		}
+	} else
+		goto skip_check;
+
 	do {
 		conf_cnt = 0;
 		check_conf(&rootmenu);
 	} while (conf_cnt);
 	if (conf_write(NULL)) {
-		fprintf(stderr, _("\n*** Error during writing of the kernel configuration.\n\n"));
+		fprintf(stderr, _("\n*** Error during writing of the uClibc configuration.\n\n"));
 		return 1;
 	}
+skip_check:
+	if (/*input_mode == ask_silent &&*/ conf_write_autoconf()) {
+		fprintf(stderr, _("\n*** Error during writing of the uClibc configuration.\n\n"));
+		return 1;
+	}
+
 	return 0;
 }
diff --git a/extra/config/confdata.c b/extra/config/confdata.c
index 60bfe77c4..0dbd14152 100644
--- a/extra/config/confdata.c
+++ b/extra/config/confdata.c
@@ -5,6 +5,7 @@
 
 #include <sys/stat.h>
 #include <ctype.h>
+#include <fcntl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -14,15 +15,31 @@
 #define LKC_DIRECT_LINK
 #include "lkc.h"
 
-const char conf_def_filename[] = ".config";
+static void conf_warning(const char *fmt, ...)
+	__attribute__ ((format (printf, 1, 2)));
 
-const char conf_defname[] = "extra/Configs/Config.default";
+static const char *conf_filename;
+static int conf_lineno, conf_warnings, conf_unsaved;
 
-const char *conf_confnames[] = {
-	".config",
-	conf_defname,
-	NULL,
-};
+const char conf_defname[] = "extra/Configs/defconfigs/$ARCH";
+
+static void conf_warning(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
+	vfprintf(stderr, fmt, ap);
+	fprintf(stderr, "\n");
+	va_end(ap);
+	conf_warnings++;
+}
+
+const char *conf_get_configname(void)
+{
+	char *name = getenv("KCONFIG_CONFIG");
+
+	return name ? name : ".config";
+}
 
 static char *conf_expand_value(const char *in)
 {
@@ -66,53 +83,70 @@ char *conf_get_default_confname(void)
 	return name;
 }
 
-int conf_read(const char *name)
+int conf_read_simple(const char *name, int def)
 {
 	FILE *in = NULL;
 	char line[1024];
 	char *p, *p2;
-	int lineno = 0;
 	struct symbol *sym;
-	struct property *prop;
-	struct expr *e;
-	int i;
+	int i, def_flags;
 
 	if (name) {
 		in = zconf_fopen(name);
 	} else {
-		const char **names = conf_confnames;
-		while ((name = *names++)) {
-			name = conf_expand_value(name);
+		struct property *prop;
+
+		name = conf_get_configname();
+		in = zconf_fopen(name);
+		if (in)
+			goto load;
+		sym_add_change_count(1);
+		if (!sym_defconfig_list)
+			return 1;
+
+		for_all_defaults(sym_defconfig_list, prop) {
+			if (expr_calc_value(prop->visible.expr) == no ||
+			    prop->expr->type != E_SYMBOL)
+				continue;
+			name = conf_expand_value(prop->expr->left.sym->name);
 			in = zconf_fopen(name);
 			if (in) {
 				printf(_("#\n"
-				         "# using defaults found in %s\n"
-				         "#\n"), name);
-				break;
+					 "# using defaults found in %s\n"
+					 "#\n"), name);
+				goto load;
 			}
 		}
 	}
-
 	if (!in)
 		return 1;
 
+load:
+	conf_filename = name;
+	conf_lineno = 0;
+	conf_warnings = 0;
+	conf_unsaved = 0;
+
+	def_flags = SYMBOL_DEF << def;
 	for_all_symbols(i, sym) {
-		sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
-		sym->flags &= ~SYMBOL_VALID;
+		sym->flags |= SYMBOL_CHANGED;
+		sym->flags &= ~(def_flags|SYMBOL_VALID);
+		if (sym_is_choice(sym))
+			sym->flags |= def_flags;
 		switch (sym->type) {
 		case S_INT:
 		case S_HEX:
 		case S_STRING:
-			if (sym->user.val)