| CMP0098 |
| ------- |
| |
| :module:`FindFLEX` runs ``flex`` in directory |
| :variable:`CMAKE_CURRENT_BINARY_DIR` when executing. |
| |
| The module provides a ``FLEX_TARGET`` macro which generates FLEX output. |
| In CMake 3.16 and below the macro would generate a custom command that runs |
| ``flex`` in the current source directory. CMake 3.17 and later prefer to |
| run it in the build directory and use :variable:`CMAKE_CURRENT_BINARY_DIR` |
| as the ``WORKING_DIRECTORY`` of its :command:`add_custom_command` invocation. |
| This ensures that any implicitly generated file is written relative to the |
| build tree rather than the source tree, unless the generated file is |
| provided as absolute path. |
| |
| This policy provides compatibility for projects that have not been updated |
| to expect the new behavior. |
| |
| The ``OLD`` behavior for this policy is for ``FLEX_TARGET`` to use |
| the current source directory for the ``WORKING_DIRECTORY`` and where |
| to generate implicit files. The ``NEW`` behavior of this policy is to |
| use the current binary directory for the ``WORKING_DIRECTORY`` relative to |
| which implicit files are generated unless provided as absolute path. |
| |
| This policy was introduced in CMake version 3.17. Use the |
| :command:`cmake_policy` command to set it to ``OLD`` or ``NEW`` explicitly. |
| Unlike many policies, CMake version |release| does *not* warn |
| when this policy is not set and simply uses ``OLD`` behavior. |
| |
| .. include:: DEPRECATED.txt |