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Resolve "(build): PCH are always rebuilt with recent cmake versions"

Flavien BRIDAULT requested to merge 806-build-pch-are-always-rebuilt-with-recent-cmake-versions into dev

Description

This was caused by the new CMake policy CMP0116 about the usage of the DEPFILE argument of add_custom_command. Since we did not succeed to use the NEW behaviour yet, we switch back, temporarily, to the OLD behaviour.

Closes #806 (closed)

How to test it?

  • Start from a clean build, with PCH enabled (default)
  • ninja core once, observe a hundred of files are built
  • ninja core a second time, observe "ninja: no work to do." is returned
Edited by Flavien BRIDAULT

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