https://github.com/edgomez/cmake-target-inspect

CMake module to inspect cmake target variables such as CMAKE_SYSTEM_NAME, CMAKE_SYSTEM_PROCESSOR before C/CXX languages are enabled
https://github.com/edgomez/cmake-target-inspect

Last synced: 3 months ago
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CMake module to inspect cmake target variables such as CMAKE_SYSTEM_NAME, CMAKE_SYSTEM_PROCESSOR before C/CXX languages are enabled

• Host: GitHub
• URL: https://github.com/edgomez/cmake-target-inspect
• Owner: edgomez
• License: mit
• Created: 2021-05-08T00:28:06.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2021-05-08T00:32:12.000Z (about 4 years ago)
• Last Synced: 2025-01-11T15:13:30.683Z (4 months ago)
• Language: CMake
• Size: 3.91 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# CMake helper module

## Description

One may want to inspect a few variables before any call to

`enable_language(C|CXX)` or `project(FOO LANGUAGES C CXX)`

is done in a project's CMakeLists.txt

For example some VSI plugins for VisualStudio mandate certain

configuration names. Detecting the platform to set

`CMAKE_CONFIGURATION_TYPES` becomes a hard problem.

How one can retrieve these information before the C/CXX languages

are enabled or `project()` is called. Only at that time,

`CMAKE_SYSTEM_NAME` and `CMAKE_SYSTEM_PROCESSOR` are fully

determined. But `CMAKE_CONFIGURATION_TYPES` are kind of frozen

internally by CMake.

Come to the rescue TargetInspector. It allows one to inspect

the variables values from a dummy project configured as closely

as possible to the current project. The inspected values are

imported back in the current scope, and evrything is done

in parallel to the currently configured cmake project so

its context is left untainted by a premature reading of the

toolchain file or any language activation...

## How to use

    list(APPEND CMAKE_MODULE_PATH "${WHERE_TARGETINSPECTOR_IS_DIR}")

    include(TargetInspect)

    target_inspect(INSPECT_VARIABLE FOO BAR OUTPUT_VARNAME INSPECTED_FOO INSPECTED_BAR)

    message("inspected FOO = ${INSPECTED_FOO}")

    message("inspected BAR = ${INSPECTED_BAR}")

Read the top directory `CMakeLists.txt` for an example.

# LICENSE

Copyright 2021 Edouard Gomez

Licensed under the terms of the MIT License

Read the file LICENSE for the complete legal text