# Building cmake on OpenVMS

**URL:** https://discourse.cmake.org/t/building-cmake-on-openvms/15707
**Category:** Code
**Created:** [June 11, 2026, 3:26am UTC](https://discourse.cmake.org/t/building-cmake-on-openvms/15707 "2026-06-11T03:26:53Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![kosborn](https://discourse.cmake.org/letter_avatar_proxy/v4/letter/k/3bc359/32.png) [@kosborn](https://discourse.cmake.org/u/kosborn)
#### Post date: [June 11, 2026, 3:26am UTC](https://discourse.cmake.org/t/building-cmake-on-openvms/15707/1 "2026-06-11T03:26:53Z")

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I am looking to port a number of open source applications to OpenVMS (x86) using GNV (i.e. gnu tools for OpenVMS) and am wanting to use cmake to help. Although OpenVMS is not listed as a supported platform in the README.rst file contained in the source tree, the bootstrap file contains many references to OpenVMS. So far I have been unsuccessful for many reasons, all related to apparent incompatibility between the OpenVMS cxx compiler and g++ (even though it does accept the -std=gnu++17 flag). I am wondering if anyone has had success in compiling cmake on OpenVMS?

Kevin