dexonsmith requested changes to this revision.
dexonsmith added a comment.
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Herald added a subscriber: kbarton.
I don't think this is quite right. I know at least `make`-based incremental
builds wouldn't deal well with this.
Given t.cpp:
#if __has_include("missing.h")
#endif
t.d will be:
t.o: missing.h
Since the build system doesn't know how to generate missing.h, when t.cpp
changes the build system will stop dead in its tracks.
Knowing the list of files that are //potential// inputs to `t.o` seems useful,
but we should probably do that under a separate flag. And if it's a separate
flag, we might consider giving it a better name than `-MF`...
https://reviews.llvm.org/D30882
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