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37 lines
1.1 KiB
Markdown
37 lines
1.1 KiB
Markdown
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# z_vcpkg_get_cmake_vars
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The latest version of this document lives in the [vcpkg repo](https://github.com/Microsoft/vcpkg/blob/master/docs/).
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**Only for internal use in vcpkg helpers. Behavior and arguments will change without notice.**
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Runs a cmake configure with a dummy project to extract certain cmake variables
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## Usage
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```cmake
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z_vcpkg_get_cmake_vars(<out-var>)
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```
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`z_vcpkg_get_cmake_vars(cmake_vars_file)` sets `<out-var>` to
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a path to a generated CMake file, with the detected `CMAKE_*` variables
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re-exported as `VCPKG_DETECTED_*`.
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## Notes
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Avoid usage in portfiles.
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All calls to `z_vcpkg_get_cmake_vars` will result in the same output file;
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the output file is not generated multiple times.
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## Examples
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* [vcpkg_configure_make](https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/vcpkg_configure_make.cmake)
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### Basic Usage
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```cmake
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z_vcpkg_get_cmake_vars(cmake_vars_file)
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include("${cmake_vars_file}")
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message(STATUS "detected CXX flags: ${VCPKG_DETECTED_CXX_FLAGS}")
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```
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## Source
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[scripts/cmake/z\_vcpkg\_get\_cmake\_vars.cmake](https://github.com/Microsoft/vcpkg/blob/master/scripts/cmake/z_vcpkg_get_cmake_vars.cmake)
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