# find\_library does not find stdc++fs

**URL:** https://discourse.cmake.org/t/find-library-does-not-find-stdc-fs/4764
**Category:** Usage
**Tags:** os:linux
**Created:** [January 2, 2022, 10:28pm UTC](https://discourse.cmake.org/t/find-library-does-not-find-stdc-fs/4764 "2022-01-02T22:28:44Z")
**Posts on this page:** 1
**Showing post:** 15

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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: [March 22, 2023, 12:22pm UTC](https://discourse.cmake.org/t/find-library-does-not-find-stdc-fs/4764/15 "2023-03-22T12:22:21Z")

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> [@JKaniarz](#):
>
> What’s specifically weird is Cray’s Clang 12 _requires_ it when Clang’s documentation says it’s only required in Clang 9

Clang docs are probably talking about libc++. If Cray is using an older libstdc++, even newer Clang would need to link AFAIK (though a link to the docs in question would help).

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