linux26: introduced SDECFG_PKG_LINUX_CONFIG_FILE as replacement of the hardcoded $base/config/$config/linux.cfg

base/linux26/config-700.in

@@ -23,12 +23,11 @@ menu_begin MENU_PKG_LINUX 'Linux Kernel Options'
 		humble 'Automatic, using defconfig but not forcing modules' \
 		nomodules 'Using defconfig but disabling all modules at the end'
 
-	if [ "$SDECFG_PKG_LINUX_CONFIG_STYLE" = none ]; then
-		comment " WARNING: you need config/$config/linux.cfg"
-		comment "          for this setting to work."
-	fi
+	comment ' '
+	text 'Custom settings file' SDECFG_PKG_LINUX_CONFIG_FILE "config/$config/linux.cfg"
 
 	if pkgcheck uml_utilities X ; then
+		comment ' '
 		choice SDECFG_PKG_LINUX_UML_STYLE modules \
 	                none 'Do not perform any automatic UML related optimization' \
        			skas3 'Build UML Host kernel with SKAS3 support' \

base/linux26/linux-conf.in

@@ -31,7 +31,8 @@ fi
 
 lx_extraversion=
 lx_kernelrelease=
-lx_customconf="$base/config/$config/linux.cfg"
+
+lx_customconf="${SDECFG_PKG_LINUX_CONFIG_FILE:-config/$config/linux.cfg}"
 
 # $lx_confmerge list of config snaps gets merged to .config.3 on auto_config()
 #
@@ -287,8 +288,12 @@ lx_config() {
 	echo "Generic linux configuration ..."
 	hook_eval preconf
 	if [ "$SDECFG_PKG_LINUX_CONFIG_STYLE" = none ] ; then
-		echo "Using only ${lx_customconf#$base/}."
-		cp -vf $lx_customconf .config
+		echo_status "Using only ${lx_customconf}."
+		if expr "$lx_customconf" : '/*' > /dev/null; then
+			cp -vf "$lx_customconf" .config
+		else
+			cp -vf "$base/$lx_customconf" .config
+		fi
 		eval $MAKE $makeopt oldconfig
 	else
 		echo "Automatically creating default configuration ...."