+[# prep some default values
+for DEFAULT_LINUX in /lib/modules/$(uname -r)/{source,build} /usr/src/linux; do
+ if readlink -q -e $DEFAULT_LINUX; then
+ break
+ fi
+done
+if test "$DEFAULT_LINUX" = "/lib/modules/$(uname -r)/source"; then
+ PATHS="/lib/modules/$(uname -r)/build"
+fi
+PATHS+="$DEFAULT_LINUX"
+for DEFAULT_LINUX_OBJ in $PATHS; do
+ if readlink -q -e $DEFAULT_LINUX_OBJ; then
+ break
+ fi
+done
+AC_MSG_CHECKING([for Linux sources])