find without path may be a GNU extension, avoid it.

autogen.sh

@@ -68,7 +68,7 @@ fi
 
 # Generate po/POTFILES.in
 $XGETTEXT --keyword=_ --keyword=N_ --output=- --stringtable-output \
-	`find -name '*.[ch]'` | \
+	`find . -name '*.[ch]'` | \
 	sed -ne 's/^\/\* File: \([^:]*\):.*$/\1/p' | sort | \
 	uniq | grep -v 'regex.c' >po/POTFILES.in