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Updates to FetchContent

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Henry Fredrick Schreiner 2018-04-05 13:01:02 +02:00
parent 832e24610d
commit ed2227e7a4
1 changed files with 16 additions and 4 deletions
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chapters/projects/fetch.md
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@ -8,9 +8,21 @@ The [FetchContent] module has excellent documentation that I won't try to repeat
* Use `FetchContent_GetProperties(MyName)` on the name you picked in the first step to get `MyName_*` variables. * Use `FetchContent_GetProperties(MyName)` on the name you picked in the first step to get `MyName_*` variables.
* Check `MyName_POPULATED`, and if not populated, use `FetchContent_Populate(MyName)` (and if a package, `add_subdirectory("${MyName_SOURCE_DIR}" "${MyName_SOURCE_DIR}")`) * Check `MyName_POPULATED`, and if not populated, use `FetchContent_Populate(MyName)` (and if a package, `add_subdirectory("${MyName_SOURCE_DIR}" "${MyName_SOURCE_DIR}")`)
For example, to download Catch2:
```cmake
FetchContent_Declare(
catch
GIT_REPOSITORY https://github.com/catchorg/Catch2.git
GIT_TAG v2.2.1
)
FetchContent_GetProperties(catch)
if(NOT catch_POPULATED)
FetchContent_Populate(catch)
add_subdirectory(${catch_SOURCE_DIR} ${catch_BINARY_DIR})
endif()
```
[FetchContent]: https://cmake.org/cmake/help/latest/module/FetchContent.html [FetchContent]: https://cmake.org/cmake/help/latest/module/FetchContent.html
{% hint style='working' %}
This document is a work in progress. You can raise an issue or put in a merge request on [GitLab](https://gitlab.com/CLIUtils/modern-cmake).
{% endhint %}
~