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anderay/gist:d1c724a67bd3e55190db54dbef252ed7

Created August 14, 2024 10:18
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CMake local package
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gistfile1.txt
When project contains several subprojects in subdirectories then problem with common packages might appear.
Common for gtest - structure
> Root
- CMakeLists.txt
> source
> test
- CMakeLists.txt
> gtest
- CMakeLists.txt
> dependencies
> dependency1 (requires gtest)
- CMakeLists.txt
Here 'test' and 'dependency1' both require 'gtest' via 'find_package(GTest REQUIRED)'.
In root CMakeLists.txt gtest is added using 'add_subdirectory(getest EXCLUDE_FROM_ALL)', similarly other dependencies.
During build gtest will not be found in 'dependency1' (since GTestConfig.cmake is created after find_package() is executed).
To overcome:
- add 'set(GTest_DIR ${CMAKE_CURRENT_SOURCE_DIR}/cmake CACHE PATH "Path to GTest package config file")'
- cerate empty 'GTestConfig.cmake' file in 'cmake' directory under 'Root'
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