diff --git a/tools/rockboxdev.sh b/tools/rockboxdev.sh
index 9b7878f..595a26a 100755
--- a/tools/rockboxdev.sh
+++ b/tools/rockboxdev.sh
@@ -39,6 +39,84 @@ fi
 ##############################################################################
 
 #
+# change rockboxdev.sh status.
+status_file="$builddir/run.status"
+selarch=
+arch=
+status=0
+
+STATUS_BINUTILS_DOWNLOAD=1
+STATUS_GCC_DOWNLOAD=2
+STATUS_PATCH_DOWNLOAD=3
+STATUS_BINUTILS_EXPANDED=4
+STATUS_GCC_EXPANDED=5
+STATUS_PATCH_APPLIED=6
+STATUS_BINUTILS_CONFIGURE=7
+STATUS_BINUTILS_BUILD=8
+STATUS_GCC_CONFIGURE=9
+STATUS_GCC_BUILD=10
+
+create_status_file() {
+    if test -f "$status_file"; then
+        rm "$status_file"
+    fi
+    touch "$status_file"
+    selarch=
+    arch=
+    status=0
+}
+
+read_status_file() {
+    if test -f "$status_file"; then
+        line=0
+        selarch=
+        arch=
+        status=0
+        while read data
+        do
+            case $line in
+            0)
+                selarch=$data
+                ;;
+            1)
+                arch=$data
+                ;;
+            2)
+                status=$data
+                ;;
+            *)
+                ;;
+            esac
+            line=`expr $line + 1`
+        done < $status_file
+    fi
+}
+
+set_targets() {
+    selarch=$1
+    arch=
+    status=0
+    echo "$selarch" > $status_file
+}
+
+update_build_target() {
+    arch=$1
+    status=0
+    echo "$selarch" > $status_file
+    echo "$arch" >> $status_file
+    echo "$status" >> $status_file
+}
+
+update_status() {
+    status=$1
+    echo "$selarch" > $status_file
+    echo "$arch" >> $status_file
+    echo "$status" >> $status_file
+}
+
+##############################################################################
+
+#
 # These are the tools this script requires and depends upon.
 reqtools="gcc bzip2 make patch"
 
@@ -123,7 +201,7 @@ echo "Build dir: $builddir (set RBDEV_BUILD to change dir)"
 
 ###########################################################################
 # Verify that the prefix dir exists and that we can write to it,
-#  as otherwise we will hardly be able to install there!
+# as otherwise we will hardly be able to install there!
 if test ! -d $prefix; then
   echo "WARNING: The installation destination does not exist."
   echo "Please create it and re-run this script"
@@ -221,16 +299,20 @@ echo "Example:"
 echo "$ GNU_MIRROR=http://mirrors.kernel.org/gnu ./rockboxdev.sh"
 echo ""
 
+cd $builddir
+
 if test -f "$dlwhere/binutils-$binutils.tar.bz2"; then
   echo "binutils $binutils already downloaded"
 else
   getfile binutils-$binutils.tar.bz2 $GNU_MIRROR/binutils
+  update_status $STATUS_BINUTILS_DOWNLOAD
 fi
 
 if test -f "$dlwhere/gcc-core-$gccver.tar.bz2"; then
   echo "gcc $gccver already downloaded"
 else
   getfile gcc-core-$gccver.tar.bz2 $GNU_MIRROR/gcc/gcc-$gccver
+  update_status $STATUS_GCC_DOWNLOAD
 fi
 
 if test -n "$gccpatch"; then
@@ -238,21 +320,11 @@ if test -n "$gccpatch"; then
     echo "$gccpatch already downloaded"
   else
     getfile "$gccpatch" "$gccurl"
+    update_status $STATUS_PATCH_DOWNLOAD
   fi
 fi
 
 ###########################################################################
-# If there's already a build dir, we don't overwrite or delete it
-if test -d $builddir; then
-  echo "You already have a $builddir directory!"
-  echo "Please remove it and re-run the script"
-  exit
-else
-  mkdir -p $builddir
-  cd $builddir
-fi
-
-###########################################################################
 # Create a summary file for each toolchain, containing info about the version
 # and a remainder to append the compiler path to PATH
 
@@ -272,50 +344,129 @@ echo "=================================================================" >> $sum
 
 cat $summary
 
-echo "ROCKBOXDEV: extracting binutils-$binutils in $builddir"
-tar xjf $dlwhere/binutils-$binutils.tar.bz2
-echo "ROCKBOXDEV: extracting gcc-$gccver in $builddir"
-tar xjf $dlwhere/gcc-core-$gccver.tar.bz2
+if test $status -lt $STATUS_BINUTILS_EXPANDED; then
+    echo "ROCKBOXDEV: extracting binutils-$binutils in $builddir"
+    tar xjf $dlwhere/binutils-$binutils.tar.bz2
+    update_status $STATUS_BINUTILS_EXPANDED
+fi
+if test $status -lt $STATUS_GCC_EXPANDED; then
+    echo "ROCKBOXDEV: extracting gcc-$gccver in $builddir"
+    tar xjf $dlwhere/gcc-core-$gccver.tar.bz2
+    update_status $STATUS_GCC_EXPANDED
+fi
 
-if test -n "$gccpatch"; then
-  echo "ROCKBOXDEV: applying gcc patch"
-  patch -p0 < "$dlwhere/$gccpatch"
+if test $status -lt $STATUS_PATCH_APPLIED; then
+    if test -n "$gccpatch"; then
+        echo "ROCKBOXDEV: applying gcc patch"
+        patch -p0 < "$dlwhere/$gccpatch"
+        update_status $STATUS_PATCH_APPLIED
+    fi
+fi
+
+if test ! -d "$builddir/build-binu"; then
+    echo "ROCKBOXDEV: mkdir $builddir/build-binu"
+    mkdir "$builddir/build-binu"
+fi
+if test $status -lt $STATUS_BINUTILS_BUILD; then
+    echo "ROCKBOXDEV: cd build-binu"
+    cd build-binu
+    if test $status -lt $STATUS_BINUTILS_CONFIGURE; then
+        echo "ROCKBOXDEV: binutils/configure"
+        # we undefine _FORTIFY_SOURCE to make the binutils built run fine on recent
+        # Ubuntu installations
+        CFLAGS=-U_FORTIFY_SOURCE ../binutils-$binutils/configure --target=$target --prefix=$prefix/$target $binutilsconf
+        update_status $STATUS_BINUTILS_CONFIGURE
+    fi
+    echo "ROCKBOXDEV: binutils/make"
+    $make
+    echo "ROCKBOXDEV: binutils/make install to $prefix/$target"
+    $make install
+    cd .. # get out of build-binu
+    update_status $STATUS_BINUTILS_BUILD
 fi
+if test $status -lt $STATUS_GCC_BUILD; then
+    PATH="${PATH}:$bindir"
+    SHELL=/bin/sh # seems to be needed by the gcc build in some cases
+    cd $builddir
+    if test ! -d build-gcc; then
+        echo "ROCKBOXDEV: mkdir build-gcc"
+        mkdir build-gcc
+    fi
+    echo "ROCKBOXDEV: cd build-gcc"
+    cd build-gcc
+    if test $status -lt $STATUS_GCC_CONFIGURE; then
+        echo "ROCKBOXDEV: gcc/configure"
+        # we undefine _FORTIFY_SOURCE to make the gcc build go through fine on
+        # recent Ubuntu installations
+        CFLAGS=-U_FORTIFY_SOURCE ../gcc-$gccver/configure --target=$target --prefix=$prefix/$target --enable-languages=c $gccconfigure
+        update_status $STATUS_GCC_CONFIGURE
+    fi
+    echo "ROCKBOXDEV: gcc/make"
+    $make
+    echo "ROCKBOXDEV: gcc/make install to $prefix/$target"
+    $make install
+    cd .. # get out of build-gcc
+    update_status $STATUS_GCC_BUILD
+    cd .. # get out of $builddir
+fi
+
+echo "Cleaning up build folder"
+cleardir $builddir
+echo ""
+echo "Done!"
+echo ""
+echo "Make your PATH include $pathadd"
 
-echo "ROCKBOXDEV: mkdir build-binu"
-mkdir build-binu
-echo "ROCKBOXDEV: cd build-binu"
-cd build-binu
-echo "ROCKBOXDEV: binutils/configure"
-# we undefine _FORTIFY_SOURCE to make the binutils built run fine on recent
-# Ubuntu installations
-CFLAGS=-U_FORTIFY_SOURCE ../binutils-$binutils/configure --target=$target --prefix=$prefix/$target $binutilsconf
-echo "ROCKBOXDEV: binutils/make"
-$make
-echo "ROCKBOXDEV: binutils/make install to $prefix/$target"
-$make install
-cd .. # get out of build-binu
-PATH="${PATH}:$bindir"
-SHELL=/bin/sh # seems to be needed by the gcc build in some cases
-
-echo "ROCKBOXDEV: mkdir build-gcc"
-mkdir build-gcc
-echo "ROCKBOXDEV: cd build-gcc"
-cd build-gcc
-echo "ROCKBOXDEV: gcc/configure"
-# we undefine _FORTIFY_SOURCE to make the gcc build go through fine on
-# recent Ubuntu installations
-CFLAGS=-U_FORTIFY_SOURCE ../gcc-$gccver/configure --target=$target --prefix=$prefix/$target --enable-languages=c $gccconfigure
-echo "ROCKBOXDEV: gcc/make"
-$make
-echo "ROCKBOXDEV: gcc/make install to $prefix/$target"
-$make install
-cd .. # get out of build-gcc
-cd .. # get out of $builddir
-
-  # end of buildone() function
+# end of buildone() function
 }
 
+read_status_file
+if test "$selarch" != "" -o "$arch" != ""; then
+    echo ""
+    echo "Because the processing of rockboxdev.sh ended on the way, "
+    echo "processing is restarted."
+    echo ""
+    echo "Select:"
+    echo "c  - Continue"
+    echo "s  - Starts from the beginning"
+    echo ""
+
+    mode=`input`
+    case $mode in
+    [cC])
+        bflg=0
+        sa=$arch
+        for ac in $selarch
+        do
+            if test "$ac" = "$sa"; then
+                bflg=1
+                buildone $ac
+            elif test $bflg -ne 0; then
+                update_build_target $ac
+                buildone $ac
+            fi
+        done
+        rm $status_file
+        exit
+        ;;
+    [sS])
+        ;;
+    *)
+        echo "An unsupported selection."
+        exit
+        ;;
+    esac
+fi
+
+if test -d $builddir; then
+    echo "deleting files..."
+    cleardir $builddir
+else
+    mkdir -p $builddir
+fi
+
+create_status_file
+
 echo ""
 echo "Select target arch:"
 echo "s   - sh       (Archos models)"
@@ -327,36 +478,29 @@ echo "(i.e. \"s m a\" will build sh, m86k and arm)"
 echo ""
 
 selarch=`input`
+set_targets "$selarch"
 
 for arch in $selarch
 do
-echo ""
-case $arch in
-  [Ss])
-    buildone $arch
-    ;;
-  [Ii])
-    buildone $arch
-    ;;
-  [Mm])
-    buildone $arch
-    ;;
-  [Aa])
-    buildone $arch
-    ;;
-  *)
-    echo "An unsupported architecture option: $arch"
-    exit
-    ;;
-esac
-
-echo "Cleaning up build folder"
-cleardir $builddir
-echo ""
-echo "Done!"
-echo ""
-echo "Make your PATH include $pathadd"
-
+    echo ""
+    case $arch in
+    [Ss])
+        buildone $arch
+        ;;
+    [Ii])
+        buildone $arch
+        ;;
+    [Mm])
+        buildone $arch
+        ;;
+    [Aa])
+        buildone $arch
+        ;;
+    *)
+        echo "An unsupported architecture option: $arch"
+        exit
+        ;;
+    esac
 done
 
 # show the summaries: