/usr/include/ is in libsynopsis0.12-dev 0.12-10.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Synopsis/
/usr/include/Synopsis/SymbolFactory.hh
/usr/include/Synopsis/PTree/
/usr/include/Synopsis/PTree/Writer.hh
/usr/include/Synopsis/PTree/Display.hh
/usr/include/Synopsis/PTree/Encoding.hh
/usr/include/Synopsis/PTree/Visitor.hh
/usr/include/Synopsis/PTree/Node.hh
/usr/include/Synopsis/PTree/operations.hh
/usr/include/Synopsis/PTree/Atoms.hh
/usr/include/Synopsis/PTree/o.hh
/usr/include/Synopsis/PTree/NodesFwd.hh
/usr/include/Synopsis/PTree/Lists.hh
/usr/include/Synopsis/PTree/TypeVisitor.hh
/usr/include/Synopsis/Trace.hh
/usr/include/Synopsis/Timer.hh
/usr/include/Synopsis/Lexer.hh
/usr/include/Synopsis/TypeAnalysis.hh
/usr/include/Synopsis/Token.hh
/usr/include/Synopsis/config.hh
/usr/include/Synopsis/TypeAnalysis/
/usr/include/Synopsis/TypeAnalysis/OverloadResolver.hh
/usr/include/Synopsis/TypeAnalysis/TypeEvaluator.hh
/usr/include/Synopsis/TypeAnalysis/Kit.hh
/usr/include/Synopsis/TypeAnalysis/ConstEvaluator.hh
/usr/include/Synopsis/TypeAnalysis/Visitor.hh
/usr/include/Synopsis/TypeAnalysis/Type.hh
/usr/include/Synopsis/SymbolLookup/
/usr/include/Synopsis/SymbolLookup/Display.hh
/usr/include/Synopsis/SymbolLookup/Symbol.hh
/usr/include/Synopsis/SymbolLookup/Walker.hh
/usr/include/Synopsis/SymbolLookup/Scope.hh
/usr/include/Synopsis/SymbolLookup/Scopes.hh
/usr/include/Synopsis/PTree.hh
/usr/include/Synopsis/SymbolLookup.hh
/usr/include/Synopsis/Buffer.hh
/usr/include/Synopsis/Parser.hh