sammccall added inline comments.
================
Comment at: llvm/cmake/modules/FindGRPC.cmake:118
+ # DEPENDS arg is a list of "Foo.proto".
+ foreach(ImportedProto IN LISTS PROTO_DEPENDS)
+ # Foo.proto -> Foo.pb.h
----------------
kbobyrev wrote:
> sammccall wrote:
> > kbobyrev wrote:
> > > On line 89 the argument is called `DEPENDS` (also in the comments) but
> > > here it is called `PROTO_DEPENDS`, I think this is a typo?
> > the variables extracted from arguments have names derived from the argument
> > labels (DEPENDS) by prepending a prefix (in this case PROTO, the third
> > argument to cmake_parse_arguments). So DEPENDS is the arg, PROTO_DEPENDS is
> > the extracted variable.
> >
> > (I forgot to mention I did test this, checking that the ninja graph still
> > shows a dependency from Service.pb.cc.o onto Index.pb.h)
> Ahh, interesting. That's not immediately obvious :D Thanks for the
> explanation!
Agree it's not obvious - I could paste the manual for cmake_parse_arguments
here but it doesn't seem appropriate :-)
================
Comment at: llvm/cmake/modules/FindGRPC.cmake:124
+ ABSOLUTE
+ BASE_DIR "${CMAKE_CURRENT_BINARY_DIR}")
+ # Compilation of each generated source depends on ${BINARY}/Foo.pb.h.
----------------
kbobyrev wrote:
> sammccall wrote:
> > kbobyrev wrote:
> > > This relies on the protos being generated from the same directory which
> > > is probably a very restrictive requirement. I don't see a better solution
> > > other than specifying dirs/full paths to the files in arguments but that
> > > does not seem nice, too. Maybe add a FIXME?
> > > This relies on the protos being generated from the same directory
> >
> > Why? The intention was that the DEPENDS args can be relative paths
> > (Foo.proto, dir/Bar.proto, ../Baz.proto) or absolute ones
> > (${CMAKE_CURRENT_BINARY_DIR}/../SomeGenerated.proto).
> >
> > Thus resolving the extension-substituted path against
> > ${CMAKE_CURRENT_BINARY_DIR}, rather than simply appending it.
> Ah, you're right, my bad.
Added some extra comments to spell this out.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D90215/new/
https://reviews.llvm.org/D90215
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