wrs_build-all: refuse to build in the wr-switch-sw directory

Signed-off-by: Federico Vaga <federico.vaga@gmail.com>

build/wrs_build-all

@@ -23,6 +23,11 @@ if [ "$WRS_OUTPUT_DIR" = "$WRS_BASE_DIR" ]; then
     wrs_die "Please run $(basename $0) from a different directory"
 fi
 
+# Refuse to build within the wr-switch-sw directory
+if echo $WRS_BASE_DIR | grep "^$WRS_OUTPUT_DIR/./build\$" > /dev/null; then
+	wrs_die "Please run $(basename $0) from a different directory"
+fi
+
 # Check the tools
 WRS_TOOLS="curl svn git gcc g++ ar as m4 libtool gettext md5sum make"
 WRS_TOOLS="$WRS_TOOLS awk unzip patch bison flex ncursesw5-config"
@@ -150,4 +155,3 @@ if $failed_step; then
     wrs_die "One or more build steps failed"
 fi
 wrs_echo "Complete build succeeded, apparently"
-