# How to define variable？

**URL:** https://discourse.cmake.org/t/how-to-define-variable/4683
**Category:** Code
**Created:** [December 16, 2021, 8:00am UTC](https://discourse.cmake.org/t/how-to-define-variable/4683 "2021-12-16T08:00:15Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![wang\_yali](https://discourse.cmake.org/user_avatar/discourse.cmake.org/wang_yali/32/2039_2.png) [@wang\_yali](https://discourse.cmake.org/u/wang_yali)
#### Post date: [December 16, 2021, 8:00am UTC](https://discourse.cmake.org/t/how-to-define-variable/4683/1 "2021-12-16T08:00:15Z")

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![image](https://discourse.cmake.org/uploads/default/original/2X/f/feab04f250ea4431d737d3168a387652e57b7272.jpeg)

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### Author: ![ben.boeckel](https://discourse.cmake.org/letter_avatar_proxy/v4/letter/b/ea5d25/32.png) [@ben.boeckel](https://discourse.cmake.org/u/ben.boeckel)
#### Post date: [December 16, 2021, 5:42pm UTC](https://discourse.cmake.org/t/how-to-define-variable/4683/2 "2021-12-16T17:42:46Z")

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@jcfr

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### Author: ![jcfr](https://discourse.cmake.org/user_avatar/discourse.cmake.org/jcfr/32/80_2.png) [@jcfr](https://discourse.cmake.org/u/jcfr)
#### Post date: [December 16, 2021, 6:01pm UTC](https://discourse.cmake.org/t/how-to-define-variable/4683/3 "2021-12-16T18:01:46Z")

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@wang_yali Thanks for the report.

This is being discussed on the Slicer forum [here](https://discourse.slicer.org/t/3d-slicer-release-build-error-variable-slicer-wc-last-changed-date-is-expected-to-be-defined-in-slicerpackageanduploadtarget/20984), I suggest you continue the discussion there.