CODEWITHSUNDEEP
cmake
Daniel Pinyol
Daniel Pinyol

Reputation: 2272

How can I get the list of dependencies of cmake target?

For instance, how can I know if my executable target E depends on my library target L?

Let's image E depends on L1 and L2, but I don't know if they depend on L.

target_link_libraries(E L1 L2)

I'd like to get the list from CMake itself before calling target_link_libraries, so that I can do some tricks if I detect that E depends on two libraries which are incompatible. I played a bit with GetPrerequisites, but this finds out dependencies on existing libraries which are on disk, not on target which are being built.

thanks

Upvotes: 43

Views: 49462

Answers (3)

user80442
user80442

Reputation: 41

I have a top level project, which contains several external sub-projects. In the CMakeLists.txt file, most of the targets are customized and not listed in the graph by default. Looking into the document at https://cmake.org/cmake/help/latest/module/CMakeGraphVizOptions.html, and it says,

GRAPHVIZ_CUSTOM_TARGETS Set to TRUE to include custom targets in the generated graphs.

Mandatory: NO

Default: FALSE

To turn it on, write a file CMakeGraphVizOptions.cmake, and put the following line in it,

SET(GRAPHVIZ_CUSTOM_TARGETS TRUE)

Wish this helps.

Upvotes: 4

LinuxDev
LinuxDev

Reputation: 335

While graphviz output likely is more intuitive, sufficiently equivalent functionality can be enabled via a simple

set_property(GLOBAL PROPERTY GLOBAL_DEPENDS_DEBUG_MODE 1)

GLOBAL_DEPENDS_DEBUG_MODE cmake.org help

Upvotes: 13

Peter Petrik
Peter Petrik

Reputation: 10195

You can use CMake's "dependency graphs generator". Please read this link for details

cmake --graphviz=test.dot . ...

Upvotes: 45

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