[CMake] Include VTK Project and Link Targets

[Nicholas Draper]

Hello,

I am having some difficulty trying to add an external project, in this
particular case the VTK (Visualization Toolkit) project, to my own project
using the *ExternalProject_Add *command. My goal is to download the project
from the git repository to a *third_party_folder* in my repo and then link
my executables against its targets.

My directory structure is as follows

   - CMakeLists.txt
   - src_folder
      - CMakeLists.txt
      - main.cpp
   - third_party_folder
      - CMakeLists.txt
   - cmake_folder
      - External-VTK.cmake


## CMakeLists.txt
cmake_minimum_version(VERSION 3.1)
project(MyProj)
list(APPEND CMAKE_MODULE_PATH

"${CMAKE_CURRENT_SOURCE_DIR}/cmake_folder")

include(ExternalProject)
add_subdirectory(src_folder)
add_subdirectory(third_party_folder)

## third_party_folder/CMakeLists.txt
include(External-VTK)

## cmake_folder/External-VTK.cmake
ExternalProject_Add(VTK

GIT_REPOSITORY https://github.com/Kitware/VTK.git

GIT_TAG                 master

SOURCE_DIR        "${CMAKE_CURRENT_SOURCE_DIR}/VTK"

BINARY_DIR          "${CMAKE_CURRENT_BINARY_DIR}/VTK")


## src_folder/CMakeLists.txt
add_executable(CylinderExample main.cpp)
target_link_libraries(CylinderExample PRIVATE ${VTK_LIBRARIES})
vtk_module_autoinit(
    TARGETS CylinderExample
    MODULES ${VTK_LIBRARIES})

This still does not seem to be doing what I want, so I was wondering if
anyone could offer some advice. I am unsure of how to get the outputted
targets from an external project. Thank you.

Nick
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://cmake.org/pipermail/cmake/attachments/20191027/ddf1a990/attachment.html>