# target\_precompile\_headers with MacOs and Objective-C++ (.mm) files

**URL:** https://discourse.cmake.org/t/target-precompile-headers-with-macos-and-objective-c-mm-files/3205
**Category:** Code
**Tags:** os:macos, gen:ninja, gen:makefiles
**Created:** [April 24, 2021, 7:35am UTC](https://discourse.cmake.org/t/target-precompile-headers-with-macos-and-objective-c-mm-files/3205 "2021-04-24T07:35:41Z")
**Posts on this page:** 1
**Showing post:** 2

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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: [April 26, 2021, 12:32pm UTC](https://discourse.cmake.org/t/target-precompile-headers-with-macos-and-objective-c-mm-files/3205/2 "2021-04-26T12:32:07Z")

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Probably. I don’t know how much Obj-C / Obj-C++ testing the PCH feature received. @brad.king Do you know?

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