Status: New
Owner: liuj...@google.com
Labels: Type-Defect Priority-Medium
New issue 686 by richardg...@gmail.com: Protoc does not provide a
dependency manifest output file for build tools like make
https://code.google.com/p/protobuf/issues/detail?id=686
Protobuf files can have import statements and include directories, so the
full dependency tree is not known by the build system before executing
protoc. This makes it hard for the build system to know when to schedule
any given protoc command.
Make & other build systems can use a dependency file to trigger a rebuild
when a dependency changes. GCC and other compilers expose this with the -MF
flag, which outputs a file in the format
output_filename: input_file \
input_file2 \
input_file3
...
Protobuf knows the transitive set of input files, but doesn't expose this
information in this format.
Patch to follow.
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