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I'm using protobuf to generate from .proto files to .cc/.h files. So I have my SConscript as below:

env.protoc('my.proto')
env.Program(target='pb_my',    CCFLAGS="-I.",   
        source=['pb_my.cpp',    'my.pb.cc'],       LIBS='protobuf')

I find that, the "env." commands in a SConscript is not executed in sequence(that's why targets can be build in parallel using scons -j20). But sometimes problem is, because the target of "pb_my" should be build after I generate "my.pb.cc" from "my.proto", scons will report error is second line is executed first.

So how can I specify that the second line's target should only be executed after 1st line is finished?

Thanks a lot.

Alireza
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Hind Forsum
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1 Answers1

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You cannot specify order in scons directly.

The proper way is to make sure the dependencies are specified.

Please include the code for your protobuf builder?

Likely if files output from your protobuf builder are being compiled before they are generated your protobuf builder isn't specifying them.

Also, please add output of scons --tree=prune to your question.

bdbaddog
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