/usr/include/antlr/ is in libantlr-dev 2.7.7+dfsg-6ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/antlr/ANTLRException.hpp
/usr/include/antlr/ANTLRUtil.hpp
/usr/include/antlr/AST.hpp
/usr/include/antlr/ASTArray.hpp
/usr/include/antlr/ASTFactory.hpp
/usr/include/antlr/ASTNULLType.hpp
/usr/include/antlr/ASTPair.hpp
/usr/include/antlr/ASTRefCount.hpp
/usr/include/antlr/BaseAST.hpp
/usr/include/antlr/BitSet.hpp
/usr/include/antlr/CharBuffer.hpp
/usr/include/antlr/CharInputBuffer.hpp
/usr/include/antlr/CharScanner.hpp
/usr/include/antlr/CharStreamException.hpp
/usr/include/antlr/CharStreamIOException.hpp
/usr/include/antlr/CircularQueue.hpp
/usr/include/antlr/CommonAST.hpp
/usr/include/antlr/CommonASTWithHiddenTokens.hpp
/usr/include/antlr/CommonHiddenStreamToken.hpp
/usr/include/antlr/CommonToken.hpp
/usr/include/antlr/IOException.hpp
/usr/include/antlr/InputBuffer.hpp
/usr/include/antlr/LLkParser.hpp
/usr/include/antlr/LexerSharedInputState.hpp
/usr/include/antlr/MismatchedCharException.hpp
/usr/include/antlr/MismatchedTokenException.hpp
/usr/include/antlr/NoViableAltException.hpp
/usr/include/antlr/NoViableAltForCharException.hpp
/usr/include/antlr/Parser.hpp
/usr/include/antlr/ParserSharedInputState.hpp
/usr/include/antlr/RecognitionException.hpp
/usr/include/antlr/RefCount.hpp
/usr/include/antlr/SemanticException.hpp
/usr/include/antlr/String.hpp
/usr/include/antlr/Token.hpp
/usr/include/antlr/TokenBuffer.hpp
/usr/include/antlr/TokenRefCount.hpp
/usr/include/antlr/TokenStream.hpp
/usr/include/antlr/TokenStreamBasicFilter.hpp
/usr/include/antlr/TokenStreamException.hpp
/usr/include/antlr/TokenStreamHiddenTokenFilter.hpp
/usr/include/antlr/TokenStreamIOException.hpp
/usr/include/antlr/TokenStreamRecognitionException.hpp
/usr/include/antlr/TokenStreamRetryException.hpp
/usr/include/antlr/TokenStreamRewriteEngine.hpp
/usr/include/antlr/TokenStreamSelector.hpp
/usr/include/antlr/TokenWithIndex.hpp
/usr/include/antlr/TreeParser.hpp
/usr/include/antlr/TreeParserSharedInputState.hpp
/usr/include/antlr/config.hpp