No such function within the flex project

[MarkLee131]

Hi, I found that there is an API main2 to test within flex project, as shown in

oss-fuzz-gen/benchmark-sets/all/flex.yaml

Line 2 in b96e9fe

- "name": "main2"

However, there doesn't seem to be such a function in this project, and experiments to generate drivers for it always fail.
Can you confirm whether it's a typo (perhaps the correct one is main) or any other problem that's causing this?

[oliverchang]

@DavidKorczynski @DonggeLiu can you please take a look?

[DavidKorczynski]

This happens because the OSS-Fuzz build for flex patches the main function to enable analysis: https://github.com/google/oss-fuzz/blob/74e3c9413ac02ea72bc3be161096a390f05de846/projects/flex/build.sh#L26 As such, there is a main2 function in the binary artifacts build by the OSS-Fuzz set up, and this is the one reported.

Likely this happens because flex is not a library as such but more of a command line application, and the libfuzzer engine has its own main function, so any other mains need to be silenced.

I can think of a few solutions but they all seem a bit hacky.