diff --git a/releng/releng_build_os b/releng/releng_build_os
old mode 100644
new mode 100755
index f3eab23..58cb93a
--- a/releng/releng_build_os
+++ b/releng/releng_build_os
@@ -1,40 +1,40 @@
-#!/bin/sh
-
-set -e
-
-cd ..
-
-if [ ! -x configure ]; then
- printf "\n*** please run ./bootstrap first.\n"
- exit 1
-fi
-
-build()
-{
- for F in ${1}
- do
-  make clean
-  clear
-  printf "\n *** building with: %s\n" CPPFLAGS=-D${F}
-  sleep 1
-  # libcdio is not autodetected by default; should be available everywhere
-  CPPFLAGS=-D${F} ./configure --enable-libcdio; make
- done
-}
-
-OS=`uname -o`
-
-case ${OS} in
-GNU/Linux)
- printf "OS: %s\n" ${OS}
- sleep 1
- build  "__linux Libburn_use_sg_dummY Libburn_use_libcdiO"
-;;
-*)
- printf "Unknown OS: %s\n" ${OS}
- exit 1
-;;
-esac
-
-# just in case
-unset CPPFLAGS
+#!/bin/sh
+
+set -e
+
+cd ..
+
+if [ ! -x configure ]; then
+ printf "\n*** please run ./bootstrap first.\n"
+ exit 1
+fi
+
+build()
+{
+ for F in ${1}
+ do
+  make clean
+  clear
+  printf "\n *** building with: %s\n" CPPFLAGS=-D${F}
+  sleep 1
+  # libcdio is not autodetected by default; should be available everywhere
+  CPPFLAGS=-D${F} ./configure --enable-libcdio; make
+ done
+}
+
+OS=`uname -o`
+
+case ${OS} in
+GNU/Linux)
+ printf "OS: %s\n" ${OS}
+ sleep 1
+ build  "__linux Libburn_use_sg_dummY Libburn_use_libcdiO"
+;;
+*)
+ printf "Unknown OS: %s\n" ${OS}
+ exit 1
+;;
+esac
+
+# just in case
+unset CPPFLAGS