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Commit 47575aab authored by Vaggelis Papoutsis's avatar Vaggelis Papoutsis Committed by Mark OLESEN
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COMP: compilation with clang (c++17) and older flex files (fixes #3337) 

- The register keyword has been removed from c++17 but old flex
  versions (version < 2.6.0) produce code including it, leading to
  compilation errors when using clang (despite disabling the diagnostic).
  gcc compiles but issues warnings.

- use '#define register' as empty as a workaround
parent 97c8e62f
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