[CMake] graphviz missing dependencies when target spans multiple subfolders

[Rich von Lehe]

I am using CMake 3.15.1.  Having found out about some of the changes with
3.13, I've started to take advantage of using 'add_subdirectory()' in
certain cases when a module is large and spans multiple source folders.

For instance:

ModuleA/CMakeLists.txt:
------------------------------------
add_library(moduleA STATIC "")

add_subdirectory(sub1)
add_subdirectory(sub2)
------------------------------------------

sub1/CMakeLists.txt
------------------------------
target_include_directories(moduleA PUBLIC .)
target_sources(moduleA
   PRIVATE
        src1.cpp
        src2.cpp
    )

target_link_libraries(moduleA
    PRIVATE
        Qt5::Widgets
        Qt5::Qml
        moduleB
    )

sub2/CMakeLists.txt
------------------------------
target_include_directories(moduleA PUBLIC .)
target_sources(moduleA
    PRIVATE
        src1.cpp
        src2.cpp
    )

target_link_libraries(moduleA
    PRIVATE
        Qt5::Quick
        moduleC
    )
-----------------------------------

I run cmake --graphviz=project.dot .

>From this, two of the files that comes out are project.dot.moduleA and
project.dot.moduleA.dependers.

The former is only this:
digraph "GG" {
node [
  fontsize = "12"
];
    "node190" [ label="moduleA" shape="diamond"];
}

There is no mention of the Qt5 or other module dependencies.


Other modules with dependencies but without the hierarchy introduced with
add_subdirectory() seem to be just fine and include their respective
dependencies in their project.dot.moduleX files.

Is this a bug or am I misusing add_subdirectory() here?  With the exception
of the graphviz output, everything builds and runs as expected with my
setup.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://cmake.org/pipermail/cmake/attachments/20191025/f42e6fcd/attachment.html>