Hello. gcc-7 build process may recreate src/Makefile.in from src/Makefile.def and src/Makefile.tpl with something like # cd src && autogen Makefile.def right after patch application.
This would drop two thousand lines of noise in debian/patches/bootstrap-no-unneeded-libs.diff debian/patches/gdc-libphobos-build].diff plus a bit more in the Ada patches. I see no counterpart. - Gcc-7 already Build-Depends: autogen for unrelated reasons. - The generation takes less than a second on my machine.
