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Explicit remark about BUILD_SHARED_LIBS (#349)

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- a remark about using BUILD_SHARED_LIBS as a CACHE variable and CMP0077.
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Ihor Dutchak 2021-11-12 01:17:06 +02:00 committed by GitHub
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BUILD.cmake.md
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@ -179,6 +179,12 @@ set(BUILD_SHARED_LIBS FALSE) # HIDAPI as static library on all platforms
add_subdirectory(hidapi)
```
<details>
<summary>NOTE</summary>
If you project happen to use `BUILD_SHARED_LIBS` as a `CACHE` variable globally for you project, setting it as simple variable, as showed above _will have not affect_ up until _CMake 3.13_. See [CMP0077](https://cmake.org/cmake/help/latest/policy/CMP0077.html) for details.
</details><br>
There are several important differences in the behavior of HIDAPI CMake build system when CMake is built as standalone package vs subdirectory build:
1) In _standalone build_ a number of standard and HIDAPI-specific variables are marked as _cache variables_ or _options_.