kconfig: sync with Linux 4.1

[karo-tx-uboot.git] / scripts / kconfig / merge_config.sh

diff --git a/scripts/kconfig/merge_config.sh b/scripts/kconfig/merge_config.sh
index efa4733461981131ef385244ca30ed48a35f303f..ec8e20350a648ca0f47f152f9650f6fa6e421a0b 100755 (executable)
--- a/scripts/kconfig/merge_config.sh
+++ b/scripts/kconfig/merge_config.sh
@@ -35,7 +35,7 @@ usage() {
        echo "  -O    dir to put generated output files"
 }
 
-MAKE=true
+RUNMAKE=true
 ALLTARGET=alldefconfig
 WARNREDUN=false
 OUTPUT=.
@@ -48,7 +48,7 @@ while true; do
                continue
                ;;
        "-m")
-               MAKE=false
+               RUNMAKE=false
                shift
                continue
                ;;
@@ -77,9 +77,19 @@ while true; do
        esac
 done
 
+if [ "$#" -lt 2 ] ; then
+       usage
+       exit
+fi
+
 INITFILE=$1
 shift;
 
+if [ ! -r "$INITFILE" ]; then
+       echo "The base file '$INITFILE' does not exist.  Exit." >&2
+       exit 1
+fi
+
 MERGE_LIST=$*
 SED_CONFIG_EXP="s/^\(# \)\{0,1\}\(CONFIG_[a-zA-Z0-9_]*\)[= ].*/\2/p"
 TMP_FILE=$(mktemp ./.tmp.config.XXXXXXXXXX)
@@ -93,25 +103,23 @@ for MERGE_FILE in $MERGE_LIST ; do
        CFG_LIST=$(sed -n "$SED_CONFIG_EXP" $MERGE_FILE)
 
        for CFG in $CFG_LIST ; do
-               grep -q -w $CFG $TMP_FILE
-               if [ $? -eq 0 ] ; then
-                       PREV_VAL=$(grep -w $CFG $TMP_FILE)
-                       NEW_VAL=$(grep -w $CFG $MERGE_FILE)
-                       if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
+               grep -q -w $CFG $TMP_FILE || continue
+               PREV_VAL=$(grep -w $CFG $TMP_FILE)
+               NEW_VAL=$(grep -w $CFG $MERGE_FILE)
+               if [ "x$PREV_VAL" != "x$NEW_VAL" ] ; then
                        echo Value of $CFG is redefined by fragment $MERGE_FILE:
                        echo Previous  value: $PREV_VAL
                        echo New value:       $NEW_VAL
                        echo
-                       elif [ "$WARNREDUN" = "true" ]; then
+               elif [ "$WARNREDUN" = "true" ]; then
                        echo Value of $CFG is redundant by fragment $MERGE_FILE:
-                       fi
-                       sed -i "/$CFG[ =]/d" $TMP_FILE
                fi
+               sed -i "/$CFG[ =]/d" $TMP_FILE
        done
        cat $MERGE_FILE >> $TMP_FILE
 done
 
-if [ "$MAKE" = "false" ]; then
+if [ "$RUNMAKE" = "false" ]; then
        cp $TMP_FILE $OUTPUT/.config
        echo "#"
        echo "# merged configuration written to $OUTPUT/.config (needs make)"