I'm interested in converting a project to using c++ modules. I found that when using the -MMD -MP flags g++ currently produces make dependency files that look like this: hellworld.d: helloworld.o gcm.cache/helloworld.gcm: helloworld.cpp old.h old.h: helloworld.c++-module: gcm.cache/helloworld.gcm .PHONY: helloworld.c++-module gcm.cache/helloworld.gcm:| helloworld.o
main.d main.o: main.cpp gcm.cache/helloworld.gcm gcm.cache/helloworld.gcm: main.o: helloworld.c++-module CXX_IMPORTS += helloworld.c++-module In the latest build of gcc the suffix is .c++-module shown above. In earlier versions it's c++m. These dependency files work ok in that they do create rebuilds of the helloworld.cpp file when there are changes. But they also force a rebuild of main on every run. Is there a suggestion on how to use these dependency files at the current time?
