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felix schwitzer authored
Commit v3.8.0-rc1~123^2 (UseSWIG: Automatically scan dependencies of SWIG files for Makefiles, 2016-12-21) introduced automatic dependency scanning for files `%include`d in a swig interface definition file. This works fine as long as no such file is removed. But removing a dependent file breaks an incremental build and `make` complains about a missing dependency, see #16830. Integrate the approach proposed in the issue above into the SWIG-module, do the workaround in a conditional step as it arises only for Makefile generators. For other generators use the implementation before that commit. Fixes: #17433.
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