Set FOP variable default value

vitcpp · vitcpp · commit c5731c9386f3 · 2023-09-15T16:16:17.000+03:00
diff --git a/doc/Makefile b/doc/Makefile
@@ -27,7 +27,7 @@ endif
 .SECONDARY:
 
 ifndef FOP
-FOP = $(missing) fop
+FOP = fop
 endif
 
 ifdef XMLLINT
