fuzzbench

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I am trying to integrate a libFuzzer-based structure-aware fuzzer that works with a corpus in an internal representation form. This means that the first step of the SUT or benchmark is always decoding the received test from the internal representation, similar to protobuf-based structure-aware solutions. For this, the benchmark build needs to know which fuzzer it is building the binary for. This works, except for the coverage build, where I couldn't find a way to inform the build that a decode step is required, as it automatically prepares the libFuzzer configuration. So the question is, is there any way to communicate the name of the corpus-generating fuzzer to the build script during the coverage build?