--- swig/perl/GNUmakefile.old 2019-09-02 16:37:34.566311857 +0100
+++ swig/perl/GNUmakefile 2019-09-02 16:38:36.695697656 +0100
@@ -64,3 +64,5 @@
.FORCE:
perl parse-for-doxygen.pl > all.pm; doxygen; rm -f all.pm
+
+.PHONY: generate