New pre-compiled headers support in CMake 3.16

[Mr-Rayman]

CMake 3.16 provides new support for pre-compiled headers:

• The “target_precompile_headers()” command was added to specify a list of headers to precompile for faster compilation times.

• The “UNITY_BUILD” target property was added to tell generators to batch include source files for faster compilation times.

https://blog.kitware.com/cmake-3-16-0-rc1-is-ready-for-testing/

I assume these new functions replace cotire in the future ..

Best,
Stefan

[fschoenm]

Do you have to manually specify the headers you want precompiled in target_precompile_headers()? Because cotire seemed to determine the relevant headers by itself somehow. Would there be a way to use that functionality of cotire to set the headers to precompile automatically?

[Mr-Rayman]

Do you have to manually specify the headers you want precompiled in target_precompile_headers()? Because cotire seemed to determine the relevant headers by itself somehow. Would there be a way to use that functionality of cotire to set the headers to precompile automatically?

As far as I understand you have to spedify the headers manually. This is the way I do it now with new pre-compiled headers feature in CMake in it works well.