# On Windows CHECK\_CXX\_SOURCE\_RUNS is calling check\_source\_runs

**URL:** https://discourse.cmake.org/t/on-windows-check-cxx-source-runs-is-calling-check-source-runs/2065
**Category:** Code
**Tags:** os:windows
**Created:** [October 24, 2020, 12:30pm UTC](https://discourse.cmake.org/t/on-windows-check-cxx-source-runs-is-calling-check-source-runs/2065 "2020-10-24T12:30:28Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![bradbell](https://discourse.cmake.org/letter_avatar_proxy/v4/letter/b/e95f7d/32.png) [@bradbell](https://discourse.cmake.org/u/bradbell)
#### Post date: [October 24, 2020, 11:07pm UTC](https://discourse.cmake.org/t/on-windows-check-cxx-source-runs-is-calling-check-source-runs/2065/6 "2020-10-24T23:07:40Z")

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So this is a change to to API for check\_cxx\_source\_runs; i.e., it is not backward compatible ?

I would expect the major version of cmake to change when the API was no longer backward compatible. Are there at least release notes that list all of these sort of changes ?

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