** BREAKER **

Changed Makefile: please do

  rm -f .bowerpackages .doc_plantuml .npmpackages \
   .phpdocinstall .plantuml .support .support_plantuml
  rm -rf doc
  make bootstrap

.gitignore

+/.doc_plantuml
+/.support
+/.support_plantuml
 /.plantuml
 /doc/plantuml
 /extension/Documentation/_make/build

Makefile

@@ -11,18 +11,21 @@ doc: phpdoc jsdoc plantuml
 t3sphinx:
 	cd extension/Documentation/_make; make html
 
-plantuml: uml/javascript/classdiagram.pu
+plantuml: uml/javascript/classdiagram.pu .support_plantuml
 	java -jar support/plantuml/plantuml.jar -tpng -o ../../doc/plantuml/javascript uml/javascript/classdiagram.pu 
 
-support:
+.support:
 	mkdir -p support
+	touch $@
 
-support_plantuml: support
+.support_plantuml: .support
 	mkdir -p support/plantuml
+	touch $@
 
-doc_plantuml:
+.doc_plantuml:
 	mkdir -p doc/plantuml/javascript
 	mkdir -p doc/plantuml/php
+	touch $@
 
 bootstrap: .phpdocinstall .npmpackages .bowerpackages .plantuml
 	npm install
@@ -35,13 +38,13 @@ jsdoc: .npmpackages
 phpdoc: .phpdocinstall
 	$(PHPDOC)
 
-.phpdocinstall: support
+.phpdocinstall: .support
 	pear config-create "`pwd`/support" "`pwd`/support/pear.config"
 	pear -c "`pwd`/support/pear.config" channel-discover pear.phpdoc.org
 	pear -c "`pwd`/support/pear.config" install phpdoc/phpDocumentor
 	touch $@
 
-.plantuml: doc_plantuml support_plantuml
+.plantuml: .doc_plantuml .support_plantuml
 	wget -O support/plantuml/plantuml.jar 'http://downloads.sourceforge.net/project/plantuml/plantuml.8039.jar?r=http%3A%2F%2Fplantuml.com%2Fdownload.html&ts=1462256908&use_mirror=vorboss'
 	touch $@