@@ -3,6 +3,20 @@

 # ffmpeg configure script (c) 2000, 2001, 2002 Fabrice Bellard

 #

+# make sure we are running under a compatible shell

+(: ${foo%%bar}) 2>/dev/null

+if test "$?" != 0; then

+    if test "x$FFMPEG_CONFIGURE_EXEC" = x; then

+        FFMPEG_CONFIGURE_EXEC=1

+        export FFMPEG_CONFIGURE_EXEC

+        exec bash "$0" "$@"

+        exec ksh "$0" "$@"

+        exec /usr/xpg4/bin/sh "$0" "$@"

+    fi

+    echo "No compatible shell script interpreter found."

+    exit 1

+fi

+

 show_help(){

   echo "Usage: configure [options]"

   echo "Options: [defaults in brackets after descriptions]"