cotire and clang, modificated system header files fail build about cotire HOT 6 OPEN

Which generator due you use?

from cotire.

Makefile

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Dependencies are completely handled by the build system that CMake creates. Cotire is passive and relies on the build system triggering a re-build of the precompiled header when it is necessary. For that purpose cotire uses the IMPLICIT_DEPENDS option which makes CMake scan the precompiled header dependencies at build time. Interestingly this does not seem to work in your case.

Which compiler do you use? Do you also use a compiler wrapper (e.g., ccache)?

from cotire.

I am using Clang without any wrapper.

If I change include files inside the project everything works fine. I am talking about system wide header files, which are not included tracked by cmake in any way.

from cotire.

This still happens regularly.
CMake triggers a rebuild of every affected in-project source file but not the PCH.
It also affects GCC. There it doesn’t even warn – not even with -Winvalid-pch, it just uses the outdated PCH.

+:
I also came across Clang’s -verify-pch, although according to the above explanation that shouldn’t be necessary.

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Still an issue for me with clang

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