I do not believe that users will cleanup kernelsource, when switching rootfs. force it with scripts and Makefile changes from Felix Fietkau <nbd@vd-s.ath.cx>

SVN-Revision: 290

openwrt/Makefile

@@ -166,27 +166,48 @@ $(CONFIG)/mconf:
 	fi
 
 menuconfig: $(CONFIG)/mconf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/mconf $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 config: $(CONFIG)/conf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 oldconfig: $(CONFIG)/conf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf -o $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 randconfig: $(CONFIG)/conf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf -r $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 allyesconfig: $(CONFIG)/conf
 	#@$(CONFIG)/conf -y $(CONFIG_CONFIG_IN)
 	#sed -i -e "s/^CONFIG_DEBUG.*/# CONFIG_DEBUG is not set/" .config
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf -o $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 allnoconfig: $(CONFIG)/conf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf -n $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 defconfig: $(CONFIG)/conf
+	-touch .config
+	-cp .config .config.test
 	@$(CONFIG)/conf -d $(CONFIG_CONFIG_IN)
+	-./scripts/configtest.pl
 
 #############################################################
 #

openwrt/README

@@ -8,7 +8,7 @@ Simply running 'make' will build your firmware and a tarball
 of kernel modules. It will download all sources, build the 
 cross-compile toolchain, the kernel and all choosen applications.
 
-You can use flash.sh for remotely updating your embedded system
+You can use scripts/flash.sh for remotely updating your embedded system
 via tftp.
 
 

openwrt/package/config/mconf.c

@@ -705,7 +705,6 @@ int main(int ac, char **av)
 		conf_write(NULL);
 		printf("\n\n"
 			"*** End of Buildroot configuration.\n"
-			"*** After changing root fs, use make linux-dirclean.\n"
 			"*** Check the top-level Makefile for additional configuration options.\n\n");
 	} else
 		printf("\n\nYour Buildroot configuration changes were NOT saved.\n\n");

openwrt/scripts/configtest.pl

@@ -0,0 +1,11 @@
+#!/usr/bin/perl
+
+my %change = (
+	'ROOTFS' => 'make linux-dirclean'
+);
+
+foreach my $change (keys %change) {
+	my $v1 = `grep '$change' .config.test`;
+	my $v2 = `grep '$change' .config`;
+	$v1 eq $v2 or system($change{$change});
+}

openwrt/target/Config.in

@@ -1,5 +1,3 @@
-comment "after changing root fs, use make linux-dirclean"
-
 choice
 	prompt "Target Root Filesystem"
 	source "target/jffs2/Config.in"