[CMake] ADD_DEPENDENCIES Adding dependency to non-existent target: doc-test

[frederic heem]

Hi,
It seems that ADD_DEPENDENCIES does not allow to add a dependency to every 
target. Here is a brief description of the problem:
A subdirectory contains a custom target to generate html from a docbook:

ADD_CUSTOM_TARGET(doc-test
                  COMMAND xmlto html 
${CMAKE_CURRENT_SOURCE_DIR}/doc/CallDocBook.xml
                  COMMENT "generate the html documentation")

Each sub-subdirectory has to generate a chapter of the docbook:

  ADD_CUSTOM_TARGET(testFoo
                    COMMAND java -jar xalan.jar -in testFoo.xml -xsl 
test.xsl -out testFooDocBook.xml)
  ADD_DEPENDENCIES(doc-test testFoo)

Unfortunately, cmake complains about ADD_DEPENDENCIES(doc-test testFoo):
ADD_DEPENDENCIES Adding dependency to non-existent target: doc-test
If ADD_DEPENDENCIES is commented, make help shows the doc-test target.
Is there a way to overcome this problem ?
Thanks,
Frederic Heem